Cryptography inventions 07/06

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...

20060165232 - Method and apparatus to encrypt video data streams: A method and system for encrypting a video data stream, the video data stream partitioned into units based upon a type of data contained within the units. The method comprising: determining for each unit the type of data contained within the unit; and encrypting a particular unit or a portion...

20060165233 - Methods and apparatuses for distributing system secret parameter group and encrypted intermediate key group for generating content encryption and decryption deys: A key issuing center (11) distributes a system secret parameter group that is information necessary for generating a content key used for encrypting a content to a server (12), and an encrypted intermediate key group set that is information necessary for generating a content key used for decrypting the content...

20060165234 - Audio scrambler and recorder for cellular telephones: A security device for a cellular telephone includes a cellular telephone interface for coupling the device to the cellular telephone, a microphone, a speaker, and an analog scrambler coupling the microphone and the speaker to the cellular telephone interface. The scrambler is able to scramble voice audio from the speaker...

20060165235 - Method for control of gaming systems and for generating random numbers: An apparatus for implementing a game having a deterministic component and a non-deterministic component wherein a player uses the game through at least one player interface unit. Each player interface unit generates a player record indicating player-initiated events. A random number generator provides a series of pseudo-random numbers and a...

20060165236 - Wireless personal area network having authentication and associated methods: A wireless personal area network (WPAN) system includes a plurality of WPAN devices using encrypted wireless communication therebetween when in an enabled state and not wirelessly communicating when in a disabled state. At least one of the WPAN devices includes a WPAN identity reader for reading at least one identifying...

20060159257 - Apparatus and method for detecting a potential attack on a cryptographic calculation: An apparatus for detecting a potential attack on a crypto-graphic calculation performing a calculation with at least one parameter includes first means for providing a parameter masked according to a first masking algorithm, first means for performing the calculation with the masked parameter in order to obtain a masked result...

20060159258 - Processor for encrypting and/or decrypting data and method of encrypting and/or decrypting data using such a processor: In order to provide a processor for encrypting and/or decrypting data and a method of encrypting and/or decrypting data using such a processor, which are characterized by a lower storage requirement and greater safety against attacks on the rounding key generation than previously known and which are preferably embodied as,...

20060159259 - Encryption and signature schemes using message mappings to reduce the message size: According to some embodiments of the invention, a message is processed before encryption so that the encryption method generates a short ciphertext. The message processing can be viewed as a mapping (610) that maps the message into another message that generates the short ciphertext. The mapping is reversible at least...

20060159260 - Method and communication system employing secure key exchange for encoding and decoding messages between nodes of a communication network: A method encodes and decodes messages between nodes of a wireless communication network. A first node, such as a fob, is mated with a second node, such as a base station, of the wireless communication network. A time duration of the mating is determined in the fob. The time duration...

20060159261 - Mpeg-4 encoding/decoding method, medium, and system: An MPEG (Moving Picture Experts Group)-4 encoding/decoding method, medium, and system. The decoding method may include detecting information for identifying an array structure of binary data describing a scene, and decoding the binary data based on the detected information. Since, a conventional process of converting data into a binary file...

20060159262 - Device for marking and restoring multimedia signals: The invention concerns a device for processing a signal comprising a signal transforming module (5) capable of producing a transformed signal (xi) from an original signal and a mixing module (10) for marking the transformed signal with a marking message (M). The mixing module (10) comprises: a formatting module (14)...

20060159263 - Scrambled state display method of broadcasting signal: A scrambled state display method of a broadcasting signal is disclosed whereby discrimination is made as to whether cable TV broadcasting signal is a scrambled A/V stream and it is displayed on a screen. If a channel switchover command is inputted, a tuner is made to tune to a broadcasting...

20060159264 - System for denying access to content generated by a compromised off line encryption device and for conveying cryptographic keys from multiple conditional access systems: A method for forwarding messages containing cryptographic keys from a conditional access system that controls a population of set-top boxes to an encryption renewal system. The method includes storing a fictitious address of a virtual set-top box; generating a message based on the fictitious address, the message containing a cryptographic...

20060159265 - Communications system and method for transmitting voice and/or data: A communications system, particularly a PMR system, for transmitting voice and/or data, for a plurality of individual subscribers, is characterized in that each subscriber has at least one subscriber terminal, at least one object characterization is assigned to each subscriber terminal, and upon the object communication request of a subscriber,...

20060159266 - Protection of digital content using block cipher crytography: Protection of digital content using a specific application of block cipher cryptography is described. The digital content is encrypted using an encryption key and a calculated initialization vector. The digital content includes a plurality of strides of data and each stride includes a string of data to be encrypted and...

20060159267 - Device, method, and program for random number generation, encryption, and decryption recording medium: Random number generating, encrypting, and decrypting apparatus, method thereof, program thereof, and recording medium thereof are provided. Random numbers for cryptographic applications are generated by a CA core. The CA core is composed of one-dimensional, two-state, and three-neighbor cell automaton. A total of three inputs for the own cell and...

20060159268 - Method and system for device authentication in home network: A method and system for authenticating a home device in a home network, includes generating a home key for authentication of the home device, receiving a secret key corresponding to the home device from the home device, encrypting the home key with the received secret key, and transmitting the encrypted...

20060159269 - Cryptographic system for resource starved ce device secure upgrade and re-configuration: A system for key management and securing communications channels is presented for the upgrade of compact electronic devices via a communications channel by service providers such as the original manufacturer and, possibly, a number of authorized third party service providers. The manufacturer, acting as a trusted authority, generates and distributes...

20060159271 - Method of local data distribution preserving rights of a remote party: A method and system of data distribution of musical data preserving the rights of a remote party employing cryptographic keys both a public key and a private key whereby a recipient must know a secret key in order to read some protected data. The sender must know a key to...

20060159270 - User key management method for broadcast encryption (be): A broadcast encryption (BE) for acquiring an encryption key which is used to decrypt a session key by a node receiving services, with less computation overhead. A plurality of subgroups, each consisting of at least one of a plurality of nodes, are generated, and layers are formed according to a...

20060159272 - Information processing system and method: An enabling key block (EKB) used in an encrypted key distributing tree structure is generated by forming a simplified 2-branch or multi-branch type tree with a terminal node or leaf which is capable of decrypting on the basis of a key corresponding to a node or a leaf of the...

20060159273 - Unauthorized-alteration detecting method, unauthorized-alteration detecting program, and recording medium having recorded the program: A false alteration detecting method using an electronic watermark method of fragile type by number theoretic transform. A processing section sets parameters P, N, α of number theoretic transform (S101), and reads original image blocks fi,j(x,y) (S103), conducts number theoretic transform of fi,j(x,y) to calculate the number theoretic transform blocks...

20060153363 - Plasma display apparatus: This document relates to a plasma display apparatus, and more particularly, to a plasma display apparatus that drives electrodes. A plasma display apparatus according to an embodiment of the present invention comprises a plasma display panel comprising a scan electrode and a sustain electrode, a driver for driving the scan...

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...

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...

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...

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...

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...

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...

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...

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...

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;...

20060153373 - System and method of transmission of generalized scalable bit-streams: A method of encrypting a transmission unit of a generalized scalable bit-stream includes, encrypting a plurality of logic units of the transmission unit using a unique encryption key for each logic unit, where the unique encryption keys for the transmission unit form a set of encryption keys. The method further...

20060153375 - Data security in wireless network system: For data protection in a wireless network system, a frame, including its Medium Address Control (MAC) header and payload, is encrypted with an initialization vector modified at each set state in a wireless network system, such that wirelessly transmitted data is prevented from being exposed to unauthorized users....

20060153374 - System and method for secure communication of electronic documents: The present invention is directed to a system and method for secure communication of electronic documents to a document processing device. A document processing request containing electronic document data is received containing document data in an unencrypted form. A seed value is then received and used to generate a random...

20060153376 - Enhanced ansi x9.17 and fips 186 pseudorandom number generators with forward security: Disclosed herein are apparatuses and methods for generating pseudorandom numbers by making the existing ANSI and FIPS PRNGs forward secure and eliminating the need for re-keying them. A forward secure ANSI PRNG is created which includes an enhanced block cipher that is non-invertible even if the key becomes known and...

20060153377 - Traceable method and system for encrypting and/or decrypting data, and recording media therefor: A traceable method for encrypting and/or decrypting data broadcast by at least one transmitter towards several decoders includes the steps: during encryption of broadcast data, the transmitter implements (in 86) at least one first secret function to transform an unencrypted message into an encrypted message; and during decryption of the...

20060153378 - Read/write media key block: A recorder system contains a media key block (MKB) and selectively writes protected content into a recording medium according to the following content protection logic, to combat theft of the protected content: If the medium does not have a MKB, then the recorder writes its stored MKB into the medium...

20060153379 - Partial encryption and pid mapping: A method consistent with certain embodiments carried out at a television provider headend involves receiving a feed of scrambled television content in the form of a stream of packets; descrambling the scrambled television content to produce a stream of clear packets; selecting a packet for multiple encryption; duplicating the packet...

20060153380 - Personal cryptoprotective complex: The invention relates to information protection and user identification. The technical result consists in functionality enhancement including: information encryption and decryption; electronic document authentication using an electronic digital signature; protection of electronic documents against copying, exchange of copy-protected electronic documents; settlements by means of electronic payment facilities; protection of software...

20060153381 - Method and apparatus for writing and using keys for encrypting/decrypting a content and a recording medium storing keys written by the method: Content encryption information on content data recorded on a recording medium. A plurality of encryption keys used for encrypting a plurality of data clips containing content data is stored in a key file and index information for associating each of the plurality of encryption keys with a data segment encrypted...

20060153382 - Extremely fast data encryption, decryption and secure hash scheme: An extremely fast data encryption, decryption and secure hash scheme encrypts or hashes data of any size, and can be implemented in a variety of software or hardware based data processing devices. A key and data are prepared for processing by separating them into a series of four byte integers,...

20060153385 - Auto configuration of portable computers for use in wireless local area networks: A method and apparatus for the configuration of a wireless network adapter is disclosed. A wireless network adapter is provided with software that enables the adapter to recognize and connect with one or more networks. Software profiles are loaded onto or created on the adapter. The software profiles each correspond...

20060153384 - Extensible architecture for untrusted medium device configuration via trusted medium: An extensible architecture for untrusted medium (e.g., wireless) device configuration via trusted medium. The architecture can be employed to associate a device that utilizes an untrusted medium (e.g., wireless connection). Association is effected using a trusted medium, for example, a wired connection. The architecture can facilitate configuration of the device...

20060153383 - Method for securing the recording mode of a home automation device: A method of securing the learning mode of a device includes an assembly of at least one command transmitter, communicating with a command receiver capable of driving an element providing for the security and/or the comfort of a building and capable of being switched to learning mode by one or...

20060153387 - Key management method for home network and home network device and system using the same: A method of managing a home network key in a home network environment, which has a key management server for managing the home network key and a plurality of home network devices, includes: allowing a home network device to generate device unique information and to transmit the device unique information...

20060153386 - Multiple matching control method: The aim of this invention is to pair a security module with one or more host apparatuses in an environment in which the host module has no connection with the management centre. This aim is achieved thanks to a pairing control method between a first device such as a removable...

20060153388 - Integrated and monolithic package structure of acoustic wave device: An integrated and monolithic package structure of acoustic wave device is provided that includes a first device, a conjunction layer, a second device and a conductive layer. The first device is placed in a way of face up, the second device is placed in a way of face down, and...

20060147039 - Data encryption method cryptographic system and associated component: An encryption method in which a clear message (m) is formatted with a formatting function (p), and in which the result of the formatting step is exponentiated using a public key (N, e) in accordance with the relationship c=μ(m)e mod N, c being an encrypted message, μ(m) being the result...

20060147040 - Rijndael block cipher apparatus and encryption/decryption method thereof: A rijndael block cipher apparatus including an operational unit that efficiently performs a round operation for encrypting/decrypting a rijndael block cipher and an encryption/decryption method thereof are disclosed. The rijndael block cipher apparatus is mounted in a mobile terminal such as a cellular phone and a PDA or a smart...

20060147041 - Des algorithm-based encryption method: Applicable in communications systems in the sending of data among user equipment of nodes connected to a network. It is characterised in that it comprises generating random keys (6) that are different for each packet, which are used for enciphering each packet by means of the DES enciphering algorithm, and...

20060147042 - Method of distributing scrambled services and/or data: p

20060147043 - Server, computer memory, and method to support security policy maintenance and distribution: In a particular embodiment, a server module deployed on a server is disclosed. The server module is connected to a wireless network access node. The server module includes a database containing user information for multiple wireless devices. Each element in the database is attributable to at least one authorized wireless...

20060147044 - Copy-protected data carrier: The present invention relates to a data carrier comprising an information layer (1) itself comprising a specific area (4) able to deliver a first optical signal and a second optical signal when illuminated by a light source. Said data carrier also comprises an additional layer (2) able to deliver an...

20060147045 - Method and apparatus for writing and using keys for encrypting/decrypting a content and a recording medium storing keys written by the method: Content encryption information on content data recorded on a recording medium. A plurality of encryption keys is used for encrypting or decrypting a plurality of clip files containing content data in such a way that each of the plurality of encryption keys is used for encrypting or decrypting the whole...