Cryptography inventions 12/05

20050286718 - Apparatus and method for generating a random number: Apparatus for generating a random number includes a sampler that samples a noise signal to obtain a noise signal sample, and a provider that provides at least three noise signal threshold values selected such that a first probability of the noise signal sample being between the first and second threshold...

20050286719 - Generating entropy through image capture: Cryptographically securing second image data using a cryptographic value derived from entropy generated by capture of first image data different from the second image data and obtained by the same image capture device. With the foregoing, an image capture device, which may be networked, is able to obtain a more...

20050286720 - Encrypting/decrypting device and method, encrypting device and method, decrypting device and method, and transmitting/receiving device: The encryption/decryption device includes: a data structure analysis block for receiving encrypted data or data to be encrypted and outputting control data and also the encrypted data or the data to be encrypted as processing block input data; a data control block for determining a mode selection signal according to...

20050286721 - Providing content in a communication system: The present invention relates to a method for providing content in a communication system. The method comprises encoding content to a first part and a second part. Furthermore, the method comprises protecting the second part of the content against unauthorised use. Furthermore, the method comprises transmitting the content to user...

20050286722 - Establishing secure peer networking in trust webs on open networks using shared secret device key: A trust web keying process provides secure peer networking of computing devices on an open network. A device is initially keyed at distribution to an end user or installer with a device-specific cryptographic key, and programmed to respond only to peer networking communication secured using the device's key. The device-specific...

20050286723 - Qkd system network: QKD system networks (50, 200, 300) and methods of communicating between end-users (P1, P2) over same are disclosed. An example QKD system network (50) includes a first QKD station (A1) and a second QKD station (A2) with a relay station (58) in between. The relay station includes a single third...

20050281404 - Scalable streaming media authentication: Consumer networks, increasingly used for multimedia information and commercial content delivery, are destined to be heterogeneous. To provide QoS, it is necessary to adapt the multimedia stream to the heterogeneous network channel conditions and device capabilities. Meanwhile, security is an important component to restrict unauthorized multimedia content access and distribution....

20050281405 - Print system, control method therefor, information processing apparatus, control method therefor, program for implementing the control method, and storage medium storing the control program: A print system which are capable of inhibiting simultaneous use of the encrypted print and the box storage to thereby increase the security of print data. A host computer has an encryption function of encrypting print data, and issues a print job for the print data encrypted by the encryption...

20050281406 - Method and device to guarantee the integrity and authenticity of a set of data: Method and a device for guaranteeing the integrity and authenticity of data transmitted between a management center and one or several receiver units, wherein each receiver unit comprises a decoder (IRD) and a security unit (SC) and means for communicating (NET, REC) with the management center. The method consists in...

20050281407 - Scrambling apparatus and method in wireless communication system: An apparatus and method of protecting content from a third party in a communication system including a wired section and a wireless section. The content transferred through the wired section is scrambled separately from a transfer through the wireless section. A controller of a sending end determines scrambling algorithms and...

20050276413 - Method and apparatus to manage heterogeneous cryptographic operations: Method and apparatus for a system to perform cryptographic operations for multiple clients are described. A request to perform cryptographic operations for a context flow may be received. A determination may be made as to whether to accept the request. The context flow may be assigned to one of multiple...

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...

20050276415 - Method and apparatus for transition of encryption key during an ongoing media communication session: The disclosed embodiments provide for methods and apparatus for encrypting media using a current media encryption key (MEK), requesting a new MEK, and receiving the new MEK. The method further provides for transitioning from the current MEK to the new MEK and continuing to encrypt the media using the new...

20050276416 - Scalable layered access control for multimedia: A flexible framework for generating “scalable layered access” codestreams allows a bitstream architect to select the number of access types and the number of access layers within each access type. At least some of the access layers are encrypted (or scrambled). Some of the access layers may be left unencrypted...

20050276417 - Apparatus and method for applying ciphering in a universal mobile telecommunications system: Apparatus and a method for ciphering messages in mobile telecommunications system user equipment and network are disclosed. The apparatus is arranged to store a plurality of current ciphering configurations and/or a plurality of old (previously applied) ciphering configurations and/or a plurality of new (future) ciphering configurations. Thus different ciphering configuration...

20050276418 - Connection authentication in wireless communication network system: In response to reception of a first piece of security code generating information from a wireless terminal by directional wireless communication, a wireless station sends wireless station ID information and a second piece of security code generating information to the wireless terminal by the directional wireless communication. The wireless station...

20050271201 - Encryption circuit: An encryption circuit of a secret key cryptosystem which inputs a plain text and a secret key 4A, inputs R partial keys Kn obtained from the secret key 4A and applies repeatedly R times of round operations to the plain text so that the plain text is encrypted including: registers...

20050271202 - Cryptographic architecture with random instruction masking to thwart differential power analysis: An apparatus and method for preventing information leakage attacks that utilize timeline alignment. The apparatus and method inserts a random number of instructions into an encryption algorithm such that the leaked information can not be aligned in time to allow an attacker to break the encryption....

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...

20050271204 - Standalone hardware accelerator for advanced encryption standard (aes) encryption and decryption: Systems and methods for accelerating AES encryption and decryption operations are provided. Aspects of the method may include time multiplexing a plurality of substitution boxes (S-boxes) for instantaneous key generation and byte substitution operations. Bytes may be substituted in at least a portion of a current security key information and...

20050271206 - Information-processing system and method, information-transmission-processing apparatus, and information-reception-processing apparatus: A processing apparatus for transmitting electronic information on copyrighted work, which has a predetermined amount of data, with an electronic signature being added thereto, includes division-processing device which divides the electronic information on copyrighted work into at least two parts, electronic-signature-operating device which operates to add the electronic signature for...

20050271205 - Mpeg-21 digital content protection system: The invention is related to Digital Rights Management (DRM) or Intellectual Property Management and Protection (IPMP) for a generic digital content. The concept of IPMP Control Graph and REL-IPMP Control Graph is introduced to carry protection signalling and rights expression data. Both content packaging and terminal processing relating to the...

20050271207 - Method and system for chaotic digital signature, encryption, and authentication: The method and system for chaotic digital signature, encryption, and authentication using a chaos generator, which operates in the domain of polynomial integer numbers of arbitrary magnitude....

20050271208 - Protecting decrypted compressed content and decrypted decompressed content at a digital rights management client: Theft of decompressed digital content as the content is being rendered is prevented. A requested slow-down of the rendering of the content is detected. Transfers of relatively large amounts of data are detected. A re-compressor-based requested slow-down of the rendering of the content is detected. A re-compressor re-compressing the content...

20050271209 - Aka sequence number for replay protection in eap-aka authentication: A method of providing authentication in a wireless network including sending, from a terminal to a wireless network a request for access authorization. The method includes transmitting from a server a return message. The return message is composed using a default sequence number value. The method includes initiating a resynchronization...

20050271210 - Key management protocol: A key distribution server maintains a tree of nodes. Members of a group who are allowed access to information are associated with respective leaf nodes of the tree. The information is encrypted with a key comprising a join key field and a leave field, and these are associated with the...

20050271211 - Key management system and playback apparatus: The Information providing system includes a key management center, information transmitter and information receiver. The key management center assigns, to the receivers, confidential information and public information for decrypting the encrypted information transmitted by the information transmitter. The key management center determines the set of the receivers for which decryption...

20050265546 - Encryption/decryption method and authentication method using multiple-affine key system: In the encryption/decryption method, a random number sequence {ri} is generated on the basis of a given multiple-affine key system K and encryption is performed by an exclusive OR of the random number sequence {ri} with a plain text. Further, the multiple-affine key system K is automatically sequentially rewritten into...

20050265547 - Method and apparatus for providing a bus-encrypted copy protection key to an unsecured bus: A copy protection (CP) key used by a sending source, such as a POD, to encrypt content such as audio and/or video information is derived by a first key generator associated with a first processor and is locally encrypted by the first processor using a locally generated bus encryption key...

20050265548 - Apparatus, method and computer product for preventing copy of data: A copy prevention apparatus is provided by an operating system. A data area is shared by a plurality of applications that operate on the operating system. A data area monitoring unit monitors storing of copy prevention data into the data area and a data area copy preventing unit prevents copying...

20050265549 - Recording medium and apparatus for protecting copyrighted digital data: Copying, dubbing or reproducing copyrighted digital data can be inhibited or restricted to properly protect a copyright. AV data recorded on a pre-recorded tape is output from a reproducing unit of a first digital VCR with protective information indicating whether the copy of the AV data is inhibited or not....

20050265550 - Polynomial-based multi-user key generation and authentication method and system: A method of generating a common secret between a first party and a second party, preferably devices (101-105) in a home network (100) that operate in accordance with a Digital Rights Management (DRM) framework. The devices calculate the common secret by evaluating the product of two polynomials P(x, y) and...

20050265551 - Wireless communication system and encryption control method: In an encryption control method of a wireless communication system in which, at the time of wireless communication, encryption parameters are used to encrypt data, and the encryption parameters are used for decryption, a judgment is made as to whether an originating mobile terminal 11 and a terminating mobile terminal...

20050265552 - Wireless device authentication at mutual reduced transmit power: A system and method for facilitating the authentication of wireless devices in an environment with multiple wireless networks. A user wishing to join an operating wireless network can bring his wireless device within close physical proximity, for example, less than one meter, of a device in the network that he...

20050265553 - Voip encryption bridging by home wireless router: A home wireless router establishes a Wireless Local Area Network (WLAN) that supports wireless communications within a WLAN service area. The home wireless router establishes broadband communications via a broadband connection with a VoIP service accumulator. The home wireless router services a plurality of wireless terminals within the WLAN service...

20050265554 - Method and apparatus for the secure storage of audio signals: A method and apparatus for recording audio so that the recording can be authenticated as to both content and time of recording is provided. The system may be implemented as a central server that is accessed via one or more telephone lines, or as a stand-alone unit. The system operates...

20050265555 - Integrity protection of streamed content: The invention relates to a method, a system, an electronic device and a computer program for providing at least one content stream to an electronic device applying Digital Rights Management (DRM). In the method a master integrity key is obtained in a streaming node. An encrypted master integrity key is...

20050265556 - Signal processing circuit: A signal processing circuit is configured by connecting a plurality of basic circuits connected in series, each of the basic circuits comprising an arithmetic circuit subjecting a first input signal and a second input signal to a signal processing; a first selection circuit outputting the first input signal or an...