REGISTER now for FREE 
|
FREE patent keyword monitoring and additional FREE benefits. REGISTER now for FREE
|
|
|
Cryptography > Particular Algorithmic Function Encoding > Public Key Public KeyPublic Key patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.11/22/07 - 20070269041 - Method and apparatus for secure messaging Methods and systems for secure messaging are disclosed. One method includes generating a first key associated with the sender. The method further includes encrypting a message from the sender to the recipient using the first key. The method also includes encrypting the first key with a second key. The method ... 10/25/07 - 20070248225 - System and method for encrypted group network communication with point-to-point privacy Various embodiments of the disclosed subject matter provide methods and systems for improved efficiency and security in secure gateway-to-secure gateway network communication. Embodiments provide systems and methods for generating a sender secure gateway private identity, obtaining a receiver secure gateway public identity, generating an encryption key using the sender secure ... 10/25/07 - 20070248224 - Method for elliptic curve public key cryptographic validation Communication and validation of information transfer from a transmitter to a receiver is achieved by generating a cipher (400) from a message m (410) using parameters of an elliptic curve, a generator point P (406) on the elliptic curve and a public key Q (416) of the receiver. The cipher ... 10/18/07 - 20070242822 - System, device, method, and program for communication A communication device performing wireless communication with another communication device includes a private value generating unit, a calculating unit, and an encryption key generating unit is provided. The private value generating unit generates a first private value to be kept secret from outside parties. The calculating unit performs a predetermined ... 10/11/07 - 20070237325 - Method and apparatus to improve security of cryptographic systems A device having cryptographic capabilities is provided as including a security system connected to a microcontroller block, whereby the security system includes a non-volatile memory and a finite state machine. The finite state machine manages the device to maintain the content of an encryption key stored within the non-volatile memory ... 10/04/07 - 20070230688 - Secret communication system and method for generating shared secret information A user request can be reflected in the degree of security of an updated key in quantum key distribution. A sender and a receiver are connected through optical fiber. A quantum transmitter in the sender and a quantum receiver in the receiver carry out basis reconciliation and error correction through ... 09/27/07 - 20070223689 - Computer architecture for a handheld electronic device with a shared human-machine interface Mobile PDA computer system (300) includes a secure user processor (302), a non-secure user processor (306), a cryptographic engine (304), and a shared human/machine interface (HMI) (308). The secure user processor (302) can be comprised of a first trusted microprocessor and a first trusted operating system executing on the first ... 09/13/07 - 20070211894 - Encryption processing apparatus, encryption processing method, and computer program An encryption processing apparatus for performing a scalar multiplication of kP+lQ based on two points P and Q on an elliptic curve and scalar values k and l or a scalar multiplication of kD1+lD2 based on divisors D1 and D2 and scalar values k and l may include a scalar ... 09/13/07 - 20070211893 - Encryption and verification using partial public key A method and device for using a partial public key in a cryptosystem. The cryptosystem may be based on a group, such as an elliptic curve over a finite field. The device includes a first memory for storing system parameters of the cryptosystem and a second memory for storing a ... 09/13/07 - 20070211892 - Authenticated device, authenticating device and authenticating method An authenticated device 200 includes a memory unit 220 to store at least one algorithm identifier and at least one encryption key identifier, a transmitting unit 212 to transmit at least one algorithm identifier and at least one encryption key identifier stored by the memory unit 220 to an authenticating ... 09/06/07 - 20070206787 - Method and system for secure transmission of an encrypted media stream across a network Embodiments of the invention provide a method and system for sending a session key file encryption key for use in the secure transmission of an encrypted media stream across a network. A logging node receives a double encrypted session key file encryption key. The session key file encryption key is ... 09/06/07 - 20070206786 - Rfid security system A process for handling secret data. In an RFID tag, a cryptography key protecting the secret data is written while with a first holder, a threshold cryptography share is stored, or an arbitrary value is obtained for an identity-based encryption (IBE) algorithm. The cryptography key can then be read and ... 08/16/07 - 20070189521 - Data transmission apparatus, data receiving apparatus and data communication method A highly concealable data communication apparatus which is based on an astronomical complexity and causes an eavesdropper to take a significantly increased time to analyze a cipher text, is provided. In a multi-level code generation section 111a, a random number sequence generation section 141 generates, based on predetermined key information ... 08/16/07 - 20070189520 - Systems and methods to facilitate transition from communication to commerce A method and system to facilitate the conversion from communications to commerce. In one embodiment, a method includes: establishing a communication session between a first user and a second user; facilitating communications between the first user and the second user for a first period of time of the communication session; ... 08/16/07 - 20070189519 - Detecting compromised ballots A facility for discerning corruption of an electronic ballot is described. The facility sends from a first computer system to a second computer system an encrypted ballot that reflects a ballot choice selected by a voter. The facility then sends a confirmation from the second computer system to the first ... 08/16/07 - 20070189518 - 3-d quaternion quantum fractal encryption An encryption method based on a controlled permutation algorithm using a three-dimensional quaternion quantum fractal image to establish a nearly infinite range of data from which encryption keys can be derived. The data of the fractal is converted at base 16 to yield millions of possible combinations for each pixel ... 08/16/07 - 20070189517 - Pseudo public key encryption According to the present invention, a secret key cryptosystem and tamper-proof hardware are used to realize a pseudo public key cryptosystem at a low cost. A trap-door one-way function is substantially realized with the use of tamper-proof hardware. Each user performs communication using equipment provided with hardware having the same ... 08/16/07 - 20070189516 - Diffused asymmetric encryption/decryption method This invention discloses an asymmetric encryption/decryption method processed by diffusion algebra, and more particularly to a multiplication method using one-dimensional matrix displacement and addition to generate a ciphertext by multiplying a public (or private) key with a plaintext or obtain the plaintext by multiplying the private (or public) key with ... 08/16/07 - 20070189515 - Public key cryptosystem and associated method utilizing a hard lattice with o(n log n) random bits for security A public key cryptosystem utilizes a hard lattice with O(n log n) random bits for security. The system comprises a public-key cryptosystem whose hardness assumption is a clearly stated mathematical problem with a long history and comprises a short key, reaching a balance between the favorable properties of the hardness ... 08/02/07 - 20070177727 - Method of a public key encryption and a cypher communication both secure against a chosen-ciphertext attack The public-key encryption method uses the sender-side apparatus by the creator of a ciphertest and creates the ciphertext of a plaintext x (∈ {0, 1}n), in y1=f (x0k1G(r)), y2=H (x0k1G(r))r with respect to the published trapdoor-equipped unidirectional function f and the random functions G, H. Meanwhile, the receiver of the ... 08/02/07 - 20070177726 - Digital signatures on a smartcard A digital signature scheme for a “smart” card utilizes a set of prestored signing elements and combines pairs of the elements to produce a new session pair. The combination of the elements is performed partly on the card and partly on the associated transaction device so that the exchange of ... 08/02/07 - 20070177725 - System and method for transmitting and receiving secret information, and wireless local communication device using the same A system and method for transmitting and receiving secret information, a device using the same, and a wireless local communication device. The system for transmitting and receiving secret information includes at least one device to generate a ciphertext using public key information that is received over a location-limited channel; and ... 07/19/07 - 20070165845 - Method and system for generating a secret key from joint randomness A method and system for generating a secret key from joint randomness shared by wireless transmit/receive units (WTRUs) are disclosed. A first WTRU and a second WTRU perform channel estimation to generate a sampled channel impulse response (CIR) on a channel between the first WTRU and the second WTRU. The ... 07/19/07 - 20070165844 - System and method for protecting master encryption keys A system and method for protecting master transport encryption keys stored on a computing device. Master transport encryption keys are used to secure data communications between computing devices. In one example embodiment, there is provided a method in which a copy of a master transport encryption key is generated and ... 07/19/07 - 20070165843 - Trapdoor pairings Systems and methods are described for trapdoor pairing. In one implementation, a trapdoor pairing is a cryptographic primitive generated by determining a bilinear pairing between an elliptic curve group and another group and selecting a parameter of the bilinear pairing, such as a group order or an isogeny between curves, ... 07/12/07 - 20070160203 - Receiver non-repudiation via a secure device Techniques for assuring a receiver's non repudiation of a communication are provided via cooperation with a secure device. A secure device operates within a local environment of a receiver and exchanges certificates with a sender via the receiver. The sender encrypts data in a communication with the receiver. Separately, the ... 07/12/07 - 20070160202 - Cipher method and system for verifying a decryption of an encrypted user data key A cipher method for verifying a decryption of an encrypted user data key used to encrypt user data prior to an encryption of the user data key with an encryption key. The cipher method involves a decryption of the encrypted user data key with a decryption key in response to ... 07/12/07 - 20070160201 - Key management for network elements The invention provides an establishment of a secret session key shared Between two network elements (NEa, NEb) belonging to different network domains (NDa, NDb). A first network element (NEa) of a first network domain (NDa) requests security parameters from an associated key management center (KMC) (AAAa). Upon reception of the ... 07/12/07 - 20070160200 - Encryption communication system If the communication partner of a client node (A1a) is an encryption communication target node (C1), a DNS Proxy unit (A12a) in the client node rewrites a response to a name resolution request for the communication partner node of an application from the actual IP address of the communication partner ... 06/28/07 - 20070147606 - Selective privacy guarantees Systems and methods are provided for selectively determining privacy guarantees. For example, a first class of data may be guaranteed a first level of privacy, while other data classes are only guaranteed some lesser level of privacy. An amount of privacy is guaranteed by adding noise values to database query ... 06/21/07 - 20070140480 - Key update system, key management device, communication terminal, and key information construction method for multihop network The invention provides a key update system for a multihop network system including an authentication management device that manages keys using a hierarchical structure. That device constructs key information having a hierarchical structure in accordance with the structure of the multihop network. In addition, that device determines respective encryption keys ... 06/21/07 - 20070140479 - Privacy-preserving data aggregation using homomorphic encryption A method and system for collecting data from devices using a homomorphic encryption of the data is provided. A collection system of a device adds contributions to homomorphically encrypted data and forwards the requests to another device. When the device receives a reply to the request, it uncombines its contribution ... 05/31/07 - 20070121937 - Site-specific access management A system for ensuring access management of a given site by providing integrated and comprehensive assessment of persons, livestock or objects that are given access to the site. The system includes a database of information about the site and potential accessors, a communication and scanning device to collect, retrieve and ... 05/31/07 - 20070121936 - Zero-knowledge proof cryptography methods and devices A cryptography method involving a keyholder having a number m≧1 of private keys Q1, Q2, . . . , Qm and respective public keys G1, G2, . . . , Gm, each pair of keys (Qi, Gi) (where i=1, . . . , m) satisfying either the relationship Gi=Qiv mod ... 05/31/07 - 20070121935 - Method for countermeasuring in an electronic component The invention relates to a method for countermeasuring in an electronic component while using a public key cryptographic algorithm. The invention involves the use of a public key cryptographic algorithm containing an exponentiation calculation y=gˆd, in which g and y are elements of specified group G noted in a multiplicative ... 05/24/07 - 20070116270 - Calculating unit for reducing an input number with respect to a modulus A calculating unit for reducing an input number with respect to a modulus, wherein the input number has input number portions of different significances, wherein the input number portions represent the input number with respect to a division number, wherein the modulus has modulus portions of different significances, and wherein ... 05/24/07 - 20070116269 - System and method for updating keys used for public key cryptography A provider system is disclosed for providing a sequence of public keys to a receiver system, wherein each public key of the sequence is related to a private key and is applicable for a public key cryptography procedure. The provider system can include a computing unit and a sending unit. ... 05/17/07 - 20070110233 - System and method for providing extensible controls in a communities framework A communities framework is disclosed which contains resources in a repository. The repository contains data stored in nodes wherein each node has data associated with a collaboration resource and each resource has a set of properties or attributes. A server can provide a content object for wrapping the node wherein ... 05/17/07 - 20070110232 - Encryption apparatus, decryption apparatus, and method A method whereby an encryption apparatus encrypts a message on the basis of a fibration X(x, y, t) serving as a public key when private keys are two or more sections corresponding to fibration X(x, y, t)=0 of an algebraic surface X, the method comprises embedding plaintext M obtained by ... 05/17/07 - 20070110231 - System and method for providing notifications in a communities framework A community enables user membership in a distributed collaborative computing environment. The members can have access to a repository of resources. Dynamic notifications between client and server can be provided. A member can be logged onto a client which pings the server computer through no interaction of the user. A ... 05/10/07 - 20070104323 - Method and system for providing privacy to sender of a mail piece Methods and systems for keeping information related to the sender of a mail piece private, while still allowing authorized parties to easily obtain the sender information if desired, is provided. Sender information for a mail piece is encrypted utilizing an identity-based encryption (IBE) scheme. The encryption key used to encrypt ... 05/03/07 - 20070098154 - Simultaneous scalar multiplication method In computing point multiples in elliptic curve schemes (e.g. kP and sQ) separately using, for example, Montgomery's method for the purpose of combining kP+sQ several operations are repeated in computing kP and sQ individually, that could be executed at the same time. A simultaneous scalar multiplication method is provided that ... 05/03/07 - 20070098153 - Cryptographic processing apparatus A cryptographic processing apparatus includes a holding unit adapted to hold data of a processing target, an intermediate data holding unit adapted to hold information generated during the cryptographic processing as intermediate data, a circuit reconfiguration processor which reconfigures a first circuit which generates round key information on the basis ... 05/03/07 - 20070098152 - Encryption/decryption of stored data using non-accessible, unique encryption key Encryption and decryption of data stored from a computing system to a storage medium is disclosed wherein the processing employs a non-accessible encryption key that is unique to the computing system. The unique encryption key can be embedded in non-removable hardware of the computing system or generated, e.g., from identification ... 04/26/07 - 20070092075 - Image public key generation method A method for generating an image public key uses a predefined image as an input to the RSA algorithm to calculate a public key that includes the predefined image information. Translating the public key into an image generates an image public key. Therefore, the method allows a user to use ... 04/12/07 - 20070081667 - User authentication based on asymmetric cryptography utilizing rsa with personalized secret A method for authenticating a user to a computer system is disclosed, comprising using a first input and a second input in producing a digital signature in response to a challenge. The digital signature is valid when the first input matches a personalized secret and the second input matches a ... 04/12/07 - 20070081666 - Transmitted information verification device and transmitted information verification method A transmitted information verification device of the invention includes: a transmitted information capture module that captures encrypted transmission object information transferred on a network, as encrypted transmitted information; a comparative information generation module that encrypts transmission object information, which is included in an encryption record created by a managed device, ... 04/05/07 - 20070076866 - Secure interface for versatile key derivation function support Improper re-use of a static Diffie-Hellman (DH) private key may leak information about the key. The leakage is prevented by a key derivation function (KDF), but standards do not agree on key derivation functions. The module for performing a DH private key operation must somehow support multiple different KDF standards. ... 04/05/07 - 20070076865 - Hashing byte streams into elements of the shafarevich-tate group of an abelian variety Systems and methods for cryptographically processing data as a function of a Cassels-Tate pairing are described. In one aspect, a Shafarevich-Tate group is generated from an abelian variety. A Cassels-Tate pairing is determined as a function of elements of the Shafarevich-Tate group. Data is then cryptographically processed as a function ... 03/29/07 - 20070071237 - Custom static diffie-hellman groups Methods for choosing groups for a static Diffie-Hellman key agreement protocol to inhibit active attacks by an adversary are provided. In mod p groups, an even h is chosen of value approximately (9/16)(log2n)2, values r and n are determined using sieving and primality testing on r and n, and a ... 03/22/07 - 20070064932 - Accelerated verification of digital signatures and public keys Accelerated computation of combinations of group operations in a finite field is provided by arranging for at least one of the operands to have a relatively small bit length. In a elliptic curve group, verification that a value representative of a point R corresponds the sum of two other points ... 03/22/07 - 20070064931 - Elliptic curve point multiplication Systems and methods configured for recoding an odd integer and elliptic curve point multiplication are disclosed, having general utility and also specific application to elliptic curve point multiplication and cryptosystems. In one implementation, the recoding is performed by converting an odd integer k into a binary representation. The binary representation ... 03/15/07 - 20070058804 - System and method for automatic redirection of a product under transport using an environmental sensor Systems and methods disclosed herein use environmental sensor technology to enhance the tracking and transporting capabilities of a product delivery system. The systems and methods provide the capability to track and verify the environmental condition(s) to which a product is subjected during its transportation or movement through a supply chain. ... 03/15/07 - 20070058803 - Information processing apparatus, verification processing apparatus, and control methods thereof An information processing apparatus comprising, a first generation unit adapted to generate data to be signed by dividing a digital document into regions, a second generation unit adapted to generate first digest values of the data to be signed and identifiers used to identify the data to be signed, a ... 03/08/07 - 20070053511 - Method and apparatus for providing privacy of user identity and characteristics in a communication system A methods and apparatus for providing privacy of user identity and characteristics in a communication system. A public key and a private key is generated, corresponding to a transceiver. The public key is transmitted to a wireless communication device. The wireless communication device encrypts one or more an initial messages ... 03/08/07 - 20070053510 - Method and system of managing and filtering electronic messages using cryptographic techniques Undesirable electronic messages, such as the unsolicited broadcast e-mail known as spam, is not only a nuisance, but wastes both computer and user resources. Conversely, desirable electronic messages with sensitive content is important to secure, so that it is not forged, tampered or revealed. Accordingly, the present invention provides cryptographic ... 03/01/07 - 20070047735 - Method, system and computer program for deploying software packages with increased security A software distribution method (300) with security add-on is proposed. Particularly, any software package to be deployed to selected target endpoints is encrypted (312-315) with a symmetric key (generated dynamically). The symmetric key is in turn encrypted (318-321) with a public key of each target endpoint. A multi-segment software package ... 02/15/07 - 20070036353 - Authentication and encryption methods using shared secret randomness in a joint channel The present invention relates to secret key generation and authentication methods that are based on joint randomness not shared by others (JRNSO), in which unique channel response between two communication terminals generates a secret key. Multiple network access points use a unique physical location of a receiving station to increase ... 02/08/07 - 20070030961 - Personal authenticating multi-function peripheral A method and apparatus of printing a document in a secure manner, includes receiving, by a printer, print data that has been encrypted using a printer public key. The printer-public-key-encrypted print data is decrypted by the printer using a printer secret key, to obtain decrypted print data as well as ... 01/18/07 - 20070014397 - Storage device and information processing device A memory card, which is a storage device connectable to a terminal, includes a buffer memory in which externally-provided data is stored, a flash memory, and a controller which controls reading and writing of data from and to these memories. The controller saves a divided input data in the non-volatile ... 01/11/07 - 20070009098 - Communication system and method for controlling the same For an error rate QBER, threshold values are preset, including a threshold value Qbit for frame synchronization processing, a threshold value Qphase for phase correction processing, and a threshold value QEve for eavesdropping detection. Upon the distribution of a quantum key from a sender to a receiver, when the measurement ... 12/21/06 - 20060285683 - Method for cryptographically processing a message, method for generating a cryptographically processed message, method for performing a cryptographic operation on a message, computer system, client computer, server computer and computer program elements A method for cryptographically processing a message is disclosed, wherein a first partial cryptographic key and a second partial cryptographic key, which correspond to a decomposition of a private cryptographic key, are used, the message is processed using the first partial cryptographic key resulting in a first partially processed message, ... 12/14/06 - 20060280298 - Rotation of keys during encryption/decryption Data is encrypted according to a plurality of data keys. During the encryption of the data, the data keys are rotated according to a data key rotation pattern, and the rotation of the data keys includes repetitive use of the data keys during the encryption of the data. The encrypted ... 10/19/06 - 20060233359 - Apparatus, method and system for providing a broadcasting service in a digital broadcasting system with a single frequency network An apparatus, method, and system for providing a broadcasting service in a Digital Multimedia Broadcasting (DMB) system with a Single Frequency Network (SFN). Networks of shadow and non-shadow regions can be distinguished in the digital broadcasting system. A conditional access system can be used in the shadow region. A terminal ... 09/14/06 - 20060204003 - Cryptographic communication system and method Cryptographic communication between communication terminals can be realized even when a plurality of cryptographic algorithms are present, and secure cryptographic communication for a longer time is realized without increasing a processing overhead at each of the communication terminals. A key management server manages cryptographic algorithms that can be used by ... 09/07/06 - 20060198516 - Systems and methods for generating random addition chains An addition chain is first generated, and then an integer x is derived from it. Doubling and star steps may be implemented in the addition chain. This approach eliminates the computationally expensive step of generating the addition chain from an exponent, and therefore can greatly reduce the computation time of ... 08/10/06 - 20060177053 - Data processing apparatus, data recording apparatus, data playback apparatus, and data storage method A data encryption processor encrypts a data set received from a controller in accordance with a predetermined encryption algorithm, and generates a data set in which encrypted data C is inserted into a data area, and encrypted data B is inserted into a padding area. The data encryption processor passes ... 07/27/06 - 20060165231 - Method of elliptic curve encryption A method of elliptic curve encryption includes, (a) selecting an elliptic curve Ep (a,b) of the form y2=x3+ax+b mod (p) wherein a and b are non-negative integers less than p satisfying the formula 4 a3+27b2 mod (p) not equal to 0; (b) generating a large 160 bit random number by ... 07/13/06 - 20060153372 - Smart card and method protecting secret key A smart card and method protecting a secret key, wherein the method may include receiving a ciphertext and a secret key, generating a table, receiving at least one random number chain, executing a logic operation for the secret key and the random number chain, and decoding the ciphertext. The smart ... 07/13/06 - 20060153371 - Generating digital signatures using ephemeral cryptographic key Generating a digital signature utilizing a cryptograph key includes: receiving into a computer system input data from a user (UID); generating within the computer system a cryptographic key as a deterministic function of the UID; clearing from the computer system the UID; generating within the computer system a digital signature ... 07/13/06 - 20060153370 - Generating public-private key pair based on user input data Keys of a public-private key pair are provided by: receiving into a computer system input data from a user (UID); generating within the computer system a first key as a deterministic function of the UID; and generating within the computer system a second key as a deterministic function of the ... 07/13/06 - 20060153369 - Providing cryptographic key based on user input data A cryptographic key is provided based on user input data (UID) by: receiving into a computer system the UID; generating within the computer system the cryptographic key as a deterministic function of the UID; and clearing from the computer system the UID following the generation of the cryptographic key. The ... 07/13/06 - 20060153368 - Software for providing based on shared knowledge public keys having same private key Facilitating communication using a digital signature includes: communicating software to a first party; receiving from the first party public keys of public-private key pairs generated using the software; and recording in a database the public keys in association with information pertaining to the software. The key pairs have the same ... 07/13/06 - 20060153367 - Digital signature system based on shared knowledge A method in a digital signature system includes providing a public key of a first party to a second party for later verification of a digital signature. The method includes: identifying domain parameters of an elliptic curve, including a generating point; transforming the generating point into a second generating point ... 07/13/06 - 20060153366 - Verifying digital signature based on shared knowledge A method of verifying a digital signature of a first party that was generated using an elliptic curve digital signature algorithm (ECDSA) includes the steps of receiving a public key from the first party; receiving a digital signature from the first party, the digital signature being for an electronic message; ... 07/13/06 - 20060153365 - Providing digital signature and public key based on shared knowledge A public key and digital signature is provided using a private key of a public-private key pair in an elliptic curve digital signature algorithm (ECDSA) by: identifying domain parameters of an elliptic curve for use in elliptic curve cryptography, the domain parameters including an initial generating point; transforming the generating ... 07/13/06 - 20060153364 - Asymmetric key cryptosystem based on shared knowledge An asymmetric key cryptosystem is provided using a private key of a public-private key pair by: identifying domain parameters of a finite cyclic group, the domain parameters including an initial generating point; transforming the initial generating point into a new generating point as a deterministic function; generating the public key ... 06/29/06 - 20060140400 - Trapdoor one-way functions on elliptic curves and their application to shorter signatures and asymmetric encryption The present invention provides a new trapdoor one-way function. In a general sense, some quadratic algebraic integer z is used. One then finds a curve E and a rational map defining [z] on E. The rational map [z] is the trapdoor one-way function. A judicious selection of z will ensure ... 06/29/06 - 20060140399 - Pre-calculation mechanism for signature decryption According to one embodiment, a method is disclosed. The method includes generating an RSA signature of a document at a first device, performing decryption pre-calculations on the RSA signature at the first device to generate a transformed encrypted signature, transmitting the transformed encrypted signature data to a second device for ... 06/29/06 - 20060140398 - Method for defence against differential power analysis attacks In order to refine a method for defence against at least one attack made by means of differential power analysis on at least one hyperelliptic cryptosystem, in particular at least one hyperelliptic public key cryptosystem, which is given by at least one hyperelliptic curve (C) of any genus (g) over ... 06/22/06 - 20060133606 - Crypto-wireless-tag The crypto-wireless-tag containing a data set, which is characterized in that it comprises at least one block of crypto data. ... 06/22/06 - 20060133605 - Authentication processing device and security processing method The present invention is relative with an authentication apparatus for performing security processing, based on PKI, responsive to the results of processing for authentication for the input information for authentication. The apparatus includes an inputting unit (12) for entering the information for authentication, an authenticating unit (21) for authenticating the ... 06/15/06 - 20060126833 - Protection of electronic data There is disclosed a scheme for secure distribution of content in a manner that users will perceive as fair, while enforcing restrictions on the use of the content in accordance with the intentions of the content originator. The scheme provides a method of encrypting data set comprising: generating a seed ... 06/15/06 - 20060126832 - Id-based signature, encryption system and encryption method An ID-based encryption and signature technique, according to which more efficient and higher speed processing is possible. In generation of public parameters, an element P of a group G1 of order q is selected, and then, g=e(P, P) calculated in advance is added to the public parameters. At the time ... 06/15/06 - 20060126831 - Systems, methods, and media for adding an additional level of indirection to title key encryption Systems, methods and media for encrypting and decrypting content files are disclosed. More particularly, hardware and/or software for adding an additional level of indirection to a title key encryption scheme are disclosed. Embodiments may include generating by a cryptographic system a binding key based on binding information. Embodiments may also ... 05/18/06 - 20060104439 - Method and system for shifting key agreement status and information storage medium A method for shifting a key agreement status in a public-key cryptographic protocol that allows key agreement between three devices includes the steps of, under condition that allow key agreement between three devices including a first device, a second device, and a dummy device, reaching key agreement between the first ... 05/11/06 - 20060098817 - Method of and apparatus for encoding a signal in a hashing primitive A process (100, 200, 300) receives at least one block of plaintext material (161, 163, 271, 273) and initializes intermediate text (150, 250). The intermediate text (150, 250) is larger than 58 octets. An updating process includes the invocation of at least one round function (171, 172, 282, 282). Each ... 05/11/06 - 20060098816 - Process of and apparatus for encoding a signal A cryptographic process includes an initialization process, invokes at least one round function (171, 172, 281, 282) and has an output function. The initialization process initializes intermediate text (150, 250) which has more than 58 octets. Each round function (171, 172, 281, 282) updates the intermediate text. Each round function ... 05/04/06 - 20060093137 - Elliptic curve cryptosystem apparatus, elliptic curve cryptosystem method, elliptic curve cryptosystem program and computer readable recording medium storing the elliptic curve cryptosystem program An elliptic curve cryptosystem apparatus performing an elliptic curve cryptosystem process has a coordinate transforming unit for transforming coordinates (X:Y:Z) on a point P on an elliptic curve over a finite field GF(pˆm) to coordinates (r1×(X−s1):r2×(Y−s2):r3×(Z−s3)) (where, p is a prime number, m is an integer not less than 1, ... 04/27/06 - 20060088157 - Public key encryption apparatus According to an aspect of this invention, there is provided a public key encryption apparatus comprising a device generating a single photon, a device generating a random number, a storage device storing the random number as a private key, a device which transmits a single photon encoded by the private ... 04/13/06 - 20060078110 - Apparatus and method for generating a key for broadcast encryption An apparatus and method for generating a key for a broadcast encryption. The apparatus includes a node secret generator for managing a user that receives broadcast data in a tree structure and for generating a unique node secret for each node in the tree structure. The apparatus also includes an ... 04/13/06 - 20060078109 - Information processing apparatus, information processing method, and program An information processing apparatus performing cryptographic processing for providing a service by using an integrated circuit chip includes an authentication unit authenticating an operator operating an external device; a storage unit storing an access control list that has identification information, identifying the operator, associated with information indicating the cryptographic processing ... 03/09/06 - 20060050870 - Information-centric security A system for encrypting a data encryption key includes a key encryption key generator configured to receive a public portion of a label, the label including an asymmetric key pair of the public portion and a private portion, the key encryption key generator being further configured to process the public ... 03/02/06 - 20060045263 - Method and apparatus for efficient generation of modulo inverse for public key cryptosystems A method, an apparatus, and a computer program are provided for efficiently determining an inverse multiplicative modulo. In many public-key cryptographic algorithms, an inverse modulo is usually calculated in key generation. However, because many Reduced Instruction Set Computers (RISCs) do not have the hardware support for division, good results are ... 02/16/06 - 20060034456 - Method and system for performing perfectly secure key exchange and authenticated messaging A system and method for the cryptographic exchange of information is provided which affords maximum security, process simplicity and participant convenience to any software application, business process or device used to communicate messages. The system provides the ability to openly exchange encryption keys for each communication between participants in a ... 02/09/06 - 20060029224 - System and recording medium for securing data and methods thereof A system and recording medium for securing data and methods thereof including a modular exponentiation. One embodiment includes first masking a message, second masking an exponent, and executing a modular exponentiation based at least one of the first and second maskings. Another embodiment includes first masking a message, second masking ... 01/19/06 - 20060013389 - Cryptographic method and apparatus A cryptographic method and apparatus is provided in which an identifier-based encryption process is used to encrypt a message with an identifier string that specifies conditions to be checked by a trusted entity before providing a decrypted form of the encrypted message, or enabling its decryption. A further trusted entity ... 12/15/05 - 20050276414 - Cryptographic method and apparatus A cryptographic method and apparatus is provided in which a first party receives and modifies a public key for which there exists a corresponding private key held by a second party. The public key is modified by exponentiating at least one element of the received public key using as exponent ... 12/08/05 - 20050271203 - Encryption apparatus, decryption apparatus, key generation apparatus, program, and method According to each embodiment of this invention, an encryption apparatus, decryption apparatus, and key generation apparatus based on a public-key cryptographic scheme whose security is based on the divisor finding problem of obtaining a divisor on an algebraic surface which is a difficult problem that has not been solved by ... 10/06/05 - 20050220300 - Public key cryptographic methods and systems Systems and methods are disclosed for establishing secure communications to a group rather than to an individual recipient. The systems and methods presented include mechanisms for encryption to a group, decryption by one or more group members, digital signature generation and verification, and the addition/removal of group members. ... 10/06/05 - 20050220299 - Public key cryptographic methods and systems Methods are disclosed for improving public key cryptography schemes, such as RSA and its variants, to allow for decryption of messages using less than all of the prime factors of the modulus that is used for encryption of said messages. ... 10/06/05 - 20050220298 - Cryptographic method for distributing load among several entities and devices therefor The invention concerns a cryptographic method whereby a second entity (B) verifies by means of a public key, a proof provided by a first entity (A), which consists in the generation by the first entity (A) of a first random number r much higher than any first integer s included ... 09/29/05 - 20050213753 - User interface of electronic apparatus and method for controlling the user interface It is an object of the present invention to provide a user interface of an electronic apparatus capable of ensuring better operability and greater convenience and a method for controlling the user interface. A user interface of an electronic apparatus of this invention includes a key discrimination unit that discriminates ... 09/15/05 - 20050201555 - System, method and apparatus for secure computation on encrypted data The present invention provides a system, method and apparatus for secure computation on encrypted data that may include a server, a source(s) of encrypted data communicably coupled to the server and a key holder(s) communicably coupled to the server. The server is capable of receiving a request invoking a computation(s) ... 09/08/05 - 20050195975 - Digital media distribution cryptography using media ticket smart cards FIG. 7 of the drawings depicts an overall view of this invention which relates to a new method or process for a system used to do digital media distribution in an architecture of public key cryptography called the digital media distribution cryptography architecture (100) which is implemented in computer hardware, ... 09/01/05 - 20050190911 - System and method for using a streaming protocol An initialization vector (IV) is employed to decrypt a block of a stream that has been encrypted with Cypher Block Chaining (CBC) encryption, without requiring decryption of previous blocks within the stream. For example, a listener who accesses a distribution point to retrieve encrypted content authenticates himself to an application ... 08/25/05 - 20050185792 - Data processing apparatus for digital copyrights management Data processing apparatus distributes a public key certificate and information about a private key to a user terminal as activation information separately from a terminal module. In the case where the public key certification is vulnerable, it transmits only the activation information again. ... 08/25/05 - 20050185791 - Circuits for calculating modular multiplicative inverse The modular exponentiation function used in public key encryption and decryption systems is implemented in a standalone engine having at its core modular multiplication circuits which operate in two phases which share overlapping hardware structures. The partitioning of large arrays in the hardware structure, for multiplication and addition, into smaller ... 08/04/05 - 20050169464 - Message deciphering method, system and article A method for decrypting the encrypted messages sent by a transmission device to a first electronic device associated with a first trusted authority and to a second electronic device (ME). In one embodiment, first and second tokens are generated and exchanged, respectively, by the first and second electronic devices, which ... 07/28/05 - 20050163314 - Method and apparatus for compressing rabin signatures A method and apparatus are disclosed for compressing Rabin signatures. The disclosed compression scheme compresses a Rabin signature, s, for a user having a public key, n, based on a continued fraction expansion of s/n. The continued fraction expansion of s/n can be performed by (i) computing principal convergents, ui/vi, ... 07/21/05 - 20050157874 - Cryptography for secure dynamic group communications 3) the last player Up sends a downflow Fln to all other players in the dynamic group, where the downflow Fln comprises information based on a random value xn, a random value vn, and the previous upflow Fln−1. New players may join the dynamic group in a similar fashion. Players ... // - 2) each player after the first Up sends an upflow Flp, comprising information based on a random value xp, a random value vp, and the previous upflow Flp−1; - ... // - 1) a first player U1 initiates an upflow to the next player, the upflow based on a random value x1, a random value v1, and “g”, a generator of a finite cyclic group where a computational solution to a Diffie-Hellman problem is hard; - ... 07/21/05 - 20050157873 - Simplified method of rsa Message signed by X ... 07/14/05 - 20050152542 - Public key encryption for groups A system is comprised of a user and a group, wherein the group is comprised of a group leader and a group of M members where M is equal to or greater than one. The group leader generates a group public key and a group leader “master” private key. The ... 06/23/05 - 20050135610 - Identifier-based signcryption Identifier-based signcryption methods and apparatus are disclosed both for signing and encrypting data, and for decrypting and verifying data. The signcryption methods use computable bilinear mappings and may be based, for example, on Weil or Tate pairings. Known, efficient, signing/verifying processes are judiciously combined with particular encryption/decryption processes to achieve ... 06/23/05 - 20050135609 - Gigabit ethernet passive optical network for securely transferring data through exchange of encryption key and data encryption method using the same A Gigabit Ethernet passive optical network (GE-PON) for securely transferring data through exchange of an encryption key comprises an optical line terminal (OLT) for encrypting a secret key using a public key received through a transmission medium, transmitting the encrypted secret key, encrypting data using the encrypted secret key, and ... 06/09/05 - 20050123131 - Cryptographic system comprising an encryption and decryption system and a key escrow system, and the associated equipment and devices The present invention concerns a cryptographic system, combining the so-called discrete logarithm and factorization principles, comprising an encryption and decryption system and a key escrow system, and the associated equipment and devices. It is particularly intended to be used in electronic systems of the type comprising chip cards, PCMCIA cards, ... 06/02/05 - 20050117746 - Systems and methods for compression of key sets having multiple keys Systems, methods and modulated data signals are described herein that provide an efficient way to derive a single key from which a user can extract virtually any number of data encryption keys. A database is logically divided into segments and a small prime number is associated with each segment. An ... 06/02/05 - 20050117745 - Data encryption and decryption method using a public key A data encryption method using a public key includes encoding data into a first code using a first public key, selecting a predetermined error vector, encoding the selected error vector into a second code using a second public key, and generating a ciphertext by adding the first and second codes. ... ### FreshPatents.com Support |