Cryptography inventions 06/06

20060140397 - Method for transmitting messages between an emitter and at least on receiver and system for implementing said method: P

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...

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...

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...

20060140402 - Enciphering apparatus and method, deciphering apparatus and method as well as information processing apparatus and method: The invention provides an enciphering apparatus and method, a deciphering apparatus and method and an information processing apparatus and method by which illegal copying can be prevented with certainty. Data enciphered by a 1394 interface of a DVD player is transmitted to a personal computer and a magneto-optical disk apparatus...

20060140401 - System and method for protecting computer software from a white box attack: Methods and systems related to increasing the cryptographic security of keys used by software with cryptographic functions. This is done by increasing the mathematical complexity of the software. The components and functions used by the software are first determined and, using these components, functions, and the data exchanged between them,...

20060140403 - Multiple transform utilization and application for secure digital watermarking: Multiple transform utilization and applications for secure digital watermarking. In one embodiment of the present invention, digital blocks in digital information to be protected are transformed into the frequency domain using a fast Fourier transform. A plurality of frequencies and associated amplitudes are identified for each of the transformed digital...

20060140405 - Protecting content objects with rights management information: A method for protecting a content object with rights management information begins by creating a content object. Permissions are assigned to the content object, an encryption key is generated, and a content protection utility is cloned. The cloned content protection utility, the encryption key, and the permissions are appended to...

20060140404 - System for managing encrypted code, data processor and electronic apparatus: After receiving and storing the ID code A of an AV data transmitter (3), a remote controller (5) for managing ID receives the ID code A or B of any one of AV data receiver 4a or 4b. When the ID code A of the AV data receiver 4a is...

20060140406 - Signal processing: A method of processing an information signal comprising: applying a signal modification process to an information signal resulting in a processed signal, said signal modification process being controlled by at least one control parameter; comparing the processed signal with the information signal to determine a measure of perceptual quality of...

20060140407 - Optical machine locking method and system: A method for assuring the authorized nature of encrypted transmissions between a plurality of communicators using a plurality of stand-alone communication processing devices, said method comprising the steps of: a) determining unique characteristics of at least one of said stand-alone communication processing devices involved in said encrypted transmissions between said...

20060140408 - Hardware-based encryption/decryption employing dual ported key storage: A system for the encryption and decryption of data employing dual ported RAM for key storage to accelerate data processing operations. The on-chip key storage includes a dual-ported memory device which allows keys to be loaded into memory simultaneous with keys being read out of memory. Thus, an encryption or...

20060140409 - Method and apparatus for preventing unauthorized data from being transferred: A method and apparatus for preventing the transfer of unauthorized data among a wireless transmit/receive unit (WTRU), an external network, and at least one access point in a wireless communication system includes the WTRU recording a subject and storing the recording as data in a memory of the WTRU. The...

20060140410 - Wireless communication device and wireless communication method: A wireless communication device for wirelessly transmitting data from a plurality of data sources to a different device. The wireless communication device includes: an authentication unit that authenticates the different device; an encryption unit that encrypts the data from the data source using a cipher key; a communication unit that...

20060140411 - Ciphering key management and distribution in mbms: A method for key management and assignment in MBMS service, the method includes following steps: the group key locates in the root node on the highest layer, which only has child nodes and doesn't have parent nodes; private keys corresponding to users locate in leaf nodes; the described intermediate node...

20060133603 - Integer division method which is secure against covert channel attacks: The invention relates to a cryptographic method involving an integer division of type q=a div b and r=a mod b, wherein a is a number of m bits, b is a number of n bits, with n being less than or equal to m, and bn−1 being non-null and the...

20060133604 - System and method for securing data from a remote input device: An input device with an integrated security module communicates with a processing component over an insecure medium. The insecure medium may be a wireless network, software stack, or the like. According to one embodiment, the security module is integrated into an existing chip of the input device. Data generated by...

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...

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....

20060133607 - Apparatus and method for generating a secret key: An apparatus comprises a circuit for generating a secret root key having bits representative of threshold voltages, and an error correction module for correcting errors in bits of the secret root key to produce a corrected secret root key. A method of generating a secret root key and a data...

20060133608 - Shrinking key generator for parallel process: A parallel processing shrinking key generator is provided. The parallel processing shrinking key generator includes: a selection linear feedback shift register (LFSR); a source LFSR; a selection logic circuit for selecting one of a source bit of the source LFSR and a predetermined input bit according to a selection bit...

20060133609 - Authentication tag for s/w media: An authentication apparatus includes a reading or recording medium equipped with an authentication tag, and a reading and recording drive that includes a transmitter and a coupler chip, wherein the authentication tag and the transmitter are capable of communicating with each other when the reading medium or the recording medium...

20060133610 - Method and system for a secure high bandwidth bus in a transceiver device: A transceiver system for receiving content contained in a secure digital broadcast signal including a first component for generating a data stream from a received digital broadcast signal coupled to a first encryption/decryption unit configured to encrypt the data stream generated from the digital broadcast signal. Transceiver system includes a...

20060133611 - Method of use data compression technology: A new method of use for compressing technology which allows for a continuous stream of data to be transmitted over pre-existing transmittal lines is described. The highly advanced data compression technology (1) allows large amounts of data, such as video data, to be compressed into small sizes. The compressed data...

20060133613 - Authentication method of ad hoc network and wireless communication terminal thereof: On ad hoc networks in which connection relationships among communication terminals constantly change, the processing load increases when authentication is performed each time a connection relationship changes. According to this invention, when communication terminals possess the same common key, mutual authentication is conducted with that common key, and when communication...

20060133612 - System and method of preventing alteration of data on a wireless device: A system and method for securing data on a wireless device. A secured zone is defined by a boundary sensor. A data processing system is coupled to the boundary sensor and a wireless device. If the data processing system detects that the signal strength of the wireless device has fallen...

20060133614 - Key synchronization mechanism for wireless lan (wlan): A key synchronization mechanism for wireless LANs is provided where the access point (AP) does not start using a new encryption key until the first data frame correctly encrypted with the new key is received from the station (STA). The new key is used from this point on, until the...

20060133616 - Cipher device using rc4 algorithm and method thereof: An encryption/decryption device and a method thereof use an RC4 algorithm to reduce a waiting time for encryption/decryption thereby avoiding data process delay. The encryption/decryption device includes a management unit, an encryption/decryption unit, and a first interface. The management unit includes a WEP seed key generator for generating a WEP...

20060133615 - Method and system for using a portable computing device as a smart key device: A first data processing system, which includes a first cryptographic device, is communicatively coupled with a second data processing system, which includes a second cryptographic device. The cryptographic devices then mutually authenticate themselves. The first cryptographic device stores a private key of a first asymmetric cryptographic key pair and a...

20060133617 - Data transmission system and data transmission method: A data transmission system includes a server and a terminal which communicates with the server. The server includes a key storage unit, data encryption unit, key transmission unit, and server encrypted-data transmission unit. The key storage unit stores a plurality of keys to encrypt data. The data encryption unit generates...

20060126826 - Apparatus and method of encoding and decoding information: A method for encoding and decoding information, the method comprising the steps of: (a) using at least one mathematical function; (b) producing an encryption algorithm using the mathematical functions such that the algorithm has at least two parameters; (c) defining a decode key of a data stream by defining the...

20060126827 - Encryption methods and apparatus: An encryption and decryption system is provided. The system includes multiple sub-key tables, each sub-key table associated with an identifying number and multiple cipher engines arranged serially, each cipher engine capable of executing a different encryption operation on an input data stream using a sub-key table and producing an output...

20060126829 - Image encryption method: An image encryption method for protecting data security and privacy is provided. A preferred embodiment and several alternate embodiments of the invention are disclosed. The method comprises mapping from the original data to a sequence of random numbers and creating a cipherimage based on that, wherein the cipherimage is the...

20060126828 - Inverse calculation circuit, inverse calculation method, and storage medium encoded with computer-readable computer program code: In an inverse calculation circuit, an inverse calculation method, and a storage medium encoded with a computer readable computer program code, a random number generator generates a first random number and a second random number; and an inverter receives a plurality of first bits expressing a first element of a...

20060126830 - Montgomery transform device, arithmetic device, ic card, encryption device, decryption device and program: According to an aspect of the invention, Montgomery arithmetic can be achieved while omitting division in an input stage. That is, the aspect of the invention is configured to obtain a Montgomery transform result m′ (=mR mod p) of n-bit from an input m of 2n-bit without using the division,...

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...

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...

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...

20060126834 - M6 block cipher system and method for encoding content and authenticating a device: An M6 block cipher system and method for encoding content and authenticating a device may use an M6 core. The M6 block cipher system may include a rotate constant selector selecting one or more rotate constants from a plurality of input rotate constants for output based on a selection signal...

20060126835 - High-speed gcm-aes block cipher apparatus and method: A high-speed Galois Counter Mode-Advanced Encryption Standard (GCM-AES) block cipher apparatus and method is provided. The apparatus can operate at a low clock frequency of 125 MHz and provide a 2 Gbps link encryption function in an Optical Line Termination (OLT) and an Optical Network Unit (ONU) of an Ethernet...

20060126836 - System and method for dynamic generation of encryption keys: In accordance with an aspect of the present invention, a method for dynamically encrypting and decrypting digital information using a dynamically generated keys is provided. The method includes, obtaining digital information to be encrypted and identifying a file that is to be used in generating a dynamic key. The identified...

20060126837 - Digital recording device for detecting copy protection signal and method thereof: A digital recording device and method are disclosed for determining whether to permit signal copying by using a normally received copy generation management system (CGMS) signal. The digital recording device includes a signal input unit to receive an analog signal, a CGMS signal detector to detect a CGMS signal from...

20060126838 - Method and system for facilitating communication: According to some embodiments of the present invention, two or more devices may establish an encrypted communication session by using a first set of directional transmitters, receivers and/or transceivers so as to transmit one or more unique identification strings over a first directional communication link. By deriving an encryption/decryption key...

20060126839 - Digital broadcasting receiving apparatus: Channel selection unit selects a channel of a desired program from a digital broadcast signal in which an ECM and an EMM are multiplexed. Separation unit separates the ECM and the EMM. EMM decoder decodes the EMM. A first key is obtained from the decoded EMM. ECM decoder decodes the...

20060126840 - Conditionally blocking reproduction of content items: A reproduction device (200) is arranged to conditionally block the reproduction of a particular content item (324). The reproduction has a unit (202) to obtain a content reference identifier (330) identifying the particular content item (324) and a storage unit (204) for storing the content reference identifier (330). A resolution...

20060126841 - Method and apparatus for a security system for wireless networks: A Method and Apparatus for a Security System for Wireless Networks is described. The technique involves encryption and decryption at the Physical layer. It also develops a criterion for choosing the encryption/decryption methodology for a particular embodiment for communication systems typically using a Viterbi Decoder and describes how the difficult-to-invert...

20060126842 - Method and system for generation of cryptographic keys and the like: A method, and deterministic random bit generator system operating in accordance with the method, for generating cryptographic keys and similar secret cryptographic inputs which are hard to guess. A seed is input from an entropy source; and an initial state is generated as a function of the seed. When a...

20060126843 - Method and apparatus for increasing the speed of cryptographic processing: Encrypting data in as cascaded block cipher system may be accomplished by applying a first encryption algorithm using a secret shared between first and second parties as a key to generate a secret inner key; applying a second encryption algorithm for a predetermined number of rounds using the secret inner...

20060126844 - Method and apparatus for achieving crypto-syncronization in a packet data communication system: A method and apparatus for achieving crypto-syncronization in a packet data communication system employing cryptographic communications. In a transmitter, a state vector is incremented at a predetermined rate and is provided to an encryption module. The encryption module uses the state vector to sequentially encrypt the data frames. During periods...

20060126845 - System and method for providing security for a wireless network: A system and method for providing secure communication between nodes (102, 106, 107) in a wireless multihopping communication network (100). The system and method achieve secure communication in a multihopping wireless network (100) by, for example, providing a transport medium for transmission of multihopping authentication messages (400) by the infrastructure...

20060126846 - Device authentication system: A device authentication system comprises a terminal device, a data communications device connected to the terminal device, and a service provider. Device information stored in the terminal device is encrypted in order to produce authentication information. Transmission is carried out with respect to user information of the data communications device...

20060126848 - Key authentication/service system and method using one-time authentication code: Provided are a key authentication/service system and method using one-time authentication code. In the system and method, a key management client sends a key management server a message requesting transmission of a message for generating authentication code required to request a key management service. Next, the key management server creates...

20060126849 - Microprocessor with program and data protection function under multi-task environment: In a microprocessor, a program key for decrypting a program and a data key for encrypting/decrypting data processed by the program are handled as cryptographically inseparable pair inside the microprocessor, so that it becomes possible for the microprocessor to protect processes that actually execute the program, without an intervention of...

20060126847 - System and method for establishing secure communications between devices in distributed wireless networks: A method of establishing secure communications between devices in a network is described. According to an embodiment, messages included in pairwise temporal key (PTK) command frames and group temporal key (GTK) command frames are defined. According to another embodiment, service primitives representing message exchanges between management entities within a device...

20060126850 - Apparatus, system, and method for transparent end-to-end security of storage data in a client-server environment: The present invention includes one or more clients in communication with a server. The client desires to send a storage construct to the server for storage. The client negotiates a transmission key with the server. The client generates a storage key associated specifically with the storage construct. The client encrypts...

20060115079 - Method and system for decoding single antenna interference cancellation (saic) and redundancy processing adaptation using burst process: Aspects of a method and system for decoding single antenna interference cancellation (SAIC) and redundancy processing adaptation using burst process are provided. A wireless receiver may decode bit sequences based on a first decoding algorithm that may utilize redundancy in the data and that may impose physical constraints. The receiver...

20060115080 - Methods and apparatus for preventing a third party from overhearing a telephone conversation: Methods and apparatus are provided for preventing a third party from listening to a conversation between at least two participants on a telephone. The telephone generates an audio stimulus signal that is presented through a secondary speaker. The audio stimulus signal may be, for example, pseudorandom noise or a cancellation...

20060115081 - Method and apparatus for security over multiple interfaces: A secure digital system including a number of ICs that exchange data among each other. Each of the ICs includes a key generator for generating a cipher key; a memory for securely storing the generated cipher key; an authenticating module for authenticating neighboring ICs of a respective IC; an encryption...

20060115082 - Authentication system with visual encryption using polarisation of light: An authentication system 600 includes optical authentication devices 620, 630, 640. Each optical authentication device includes an optical layer 622, 632, 642. The optical layer includes a representation of a first image visually encrypted under control of an encryption key. The encrypted first image uniquely identifies the respective authentication device....

20060115083 - Partial encryption and pid mapping: A method of selecting data for multiple carriage partial encryption consistent with certain embodiments involves examining unencrypted packets of data in a digital audio/video data stream to identify a packet type; and selecting packets of the identified packet type for multiple partial encryption, wherein the amount of data to be...

20060115084 - Conditional access for a multimedia broadcast service using a wireless terminal: The present invention relates to conditional access for receiving a broadcast service. The present invention comprises requesting reception of a service from a wireless cellular communication network, receiving at least one encryption key from the wireless cellular communication network for decrypting encrypted service data, wherein the at least one encryption...

20060115085 - Communication system having plurality of nodes sharing a common cipher key, cipher key dispatching apparatus for use in the system, and anti-theft apparatus utilizing information derived from cipher key utilization: A communication system has a plurality of nodes that perform encrypted communication via a LAN, each using an identical common cipher key. The common cipher key is replaced at fixed or irregular intervals, by being transmitted from a main node in a broadcast mode via the LAN to respective secondary...

20060115086 - Self-authenticating quantum random number generator: A quantum random number generator uses measurements of a quantum state to generate a random value and to authenticate that the quantum state had the required properties for generation of a random series having the desired statistics. One exemplary embodiment generates an entangled photon pair in the singlet Bell state,...

20060115087 - Scrambler, descrambler and method, and disc apparatus: The descrambler receives scrambled data generated from byte data associated with an encoding sequence Q and a scramble value corresponding to the sequence Q in a processing sequence P. The descrambler includes a scramble value generation section that generates a scramble value of the encoding sequence Q of input data,...

20060115088 - Method and apparatus for end-to-end clear transport protocol: A communication system provides a clear channel link for transport of encrypted payload across a network of the communication system. When a source access network receives, via an air interface, a frame that is formatted pursuant to an air interface protocol and that comprises encrypted payload, the source access network...

20060115089 - Key distribution: Methods and systems are provided for trusted key distribution. A key distribution or an identity service acts as an intermediary between participants to a secure network. The service provisions and manages the distribution of keys. The keys are used for encrypting communications occurring within the secure network....