http://www.freshpatents.com/Cryptography-dtnewntc380.php USPTO Class 380 - Cryptography en-us Wed, 30 Apr 2008 12:32:19 -0700 1000 Wednesday Thursday Friday Saturday Sunday 141 31 http://www.freshpatents.com/index.php?rss=true http://www.freshpatents.com/images/freshpatentsnav_rss.gif http://www.freshpatents.com/Security-system-for-wireless-networks-dt20080424ptan20080095359.php Wed, 30 Apr 2008 12:32:19 -0700 The invention relates to a device (21) for managing guest key records (6) in wireless home networks (1), comprising at least one interface (211) for connecting a guest key transmitter (GKT) (5), a key generator (212) and a transmission unit (213) for transmitting a generated key record (6) to the... http://www.freshpatents.com/Security-enhanced-key-exchange-dt20080424ptan20080095361.php Wed, 30 Apr 2008 12:32:19 -0700 A unique identifier of a remote device is not sent in clear text on a local interlace between the remote device and a device that can communicate with a wireless network, but a procedure for establishing an encryption key in both devices is still based on the unique identifier. Thus,... http://www.freshpatents.com/Signature-system-and-signature-method-dt20080424ptan20080095360.php Wed, 30 Apr 2008 12:32:19 -0700 A signature system in which size of data to be transmitted is small and data can be processed efficiently in a Merkle signature system having high security. A processing part 112 of a smartcard 110 divides a message to be signed into groups of specific numbers of bits, starting from... http://www.freshpatents.com/Cryptographic-key-management-in-communication-networks-dt20080424ptan20080095362.php Wed, 30 Apr 2008 12:32:19 -0700 An authentication server and a system and method for managing cryptographic keys across different combinations of user terminals, access networks, and core networks. A Transformation Coder Entity (TCE) creates a master key (Mk), which is used to derive keys during the authentication procedure. During handover between the different access types,... http://www.freshpatents.com/Cryptographic-computation-method-cryptographic-system-and-computer-program-dt20080424ptan20080095357.php Wed, 30 Apr 2008 12:32:19 -0700 A system and method for achieving secure and fast computation in hyperelliptic cryptography is realized. Fast scalar multiplication is achieve by executing computing operations including halving as computing processing in scalar multiplication with respect to a divisor D in hyperelliptic curve cryptography. For example, computing operations including halving are executed... http://www.freshpatents.com/Method-and-device-for-restoring-degraded-information-dt20080424ptan20080095358.php Wed, 30 Apr 2008 12:32:19 -0700 The present invention provides a technology which precisely restores a distribution of original information by carrying out an iterative calculation based on a distribution of degraded information and a transfer function including a phase characteristic of a transfer system. A method according to the present invention restores the original information... http://www.freshpatents.com/System-and-method-for-causing-distortion-in-captured-images-dt20080424ptan20080095363.php Wed, 30 Apr 2008 12:32:19 -0700 An image display system including an image generator configured to generate display information for at least four display primaries by applying distortion information to an input signal, where the distortion information configured to compensate for variations in human cone responses, and a display device including the at least four display... http://www.freshpatents.com/Partial-encryption-dt20080424ptan20080095364.php Wed, 30 Apr 2008 12:32:19 -0700 A multiple partial encryption device consistent with certain embodiments has an input for receiving a unencrypted video signal. An encryption arrangement produces a partially multiple encrypted video signal from the unencrypted video signal. An output provides the partially multiple encrypted video signal. This abstract is not to be considered limiting,... http://www.freshpatents.com/Method-and-apparatus-for-supporting-multiple-broadcasters-independently-using-a-single-conditional-access-system-dt20080424ptan20080095365.php Wed, 30 Apr 2008 12:32:19 -0700 A method and apparatus for brokering the enablement of the communication of encrypted media programs from a plurality of independent broadcasters to a plurality of receivers is disclosed. The system makes use of a pairing key for each provided service, which is differently encrypted by a pairing server and by... http://www.freshpatents.com/Digital-video-receiver-ecm-extract-equipment-emm-extract-equipment-scramble-key-extract-equipment-cci-extract-equipment-digital-video-receiving-system-ecm-extract-method-emm-extract-method-scramble-key-extract-method-cci-extract-method-digital-v-dt20080424ptan20080095366.php Wed, 30 Apr 2008 12:32:19 -0700 A decryption process chip has a memory in which a first decryption control unit for decrypting a scramble key by using an ECM and an EMM is downloaded from outside and stored. A stream input unit extracts a packet including the ECM based on first information obtained from the first... http://www.freshpatents.com/Methods-and-apparatus-for-confidentiality-protection-for-fibre-channel-common-transport-dt20080424ptan20080095367.php Wed, 30 Apr 2008 12:32:19 -0700 Methods and apparatus are provided for improving message-based security in a Fibre Channel network. More specifically, the present invention relates to methods and apparatus for providing confidentiality for Fibre Channel control messages encapsulated within Common Transport Information Units. Control messages transported with the Fibre Channel Common Transport protocol, and passed... http://www.freshpatents.com/Symmetric-key-generation-apparatus-and-symmetric-key-generation-method-dt20080424ptan20080095368.php Wed, 30 Apr 2008 12:32:19 -0700 Asymmetric key generation apparatus generates asymmetric key based on a different key material for each piece of data. The symmetric key generation apparatus is configured to generate a symmetric key of a practically different value for a key material of a different value. An encrypted piece of data has a... http://www.freshpatents.com/Method-of-configuring-a-node-related-node-and-configuration-server-dt20080424ptan20080095369.php Wed, 30 Apr 2008 12:32:19 -0700 when said node has been successfully identified, retrieving the set of configuration parameters stored for said node and transmitting said set of configuration parameters to said node. identifying said node by use of an identity based identification algorithm taking account of said public... http://www.freshpatents.com/Ends-messaging-protocol-that-recovers-and-has-backward-security-dt20080424ptan20080095371.php Wed, 30 Apr 2008 12:32:19 -0700 The presented messaging protocol uses three new public keys in a signed and encrypted message to achieve backward security and recovery in an environment where an attacker now and then obtains the security parameters in exposed, decrypted form. Backward security is understood to mean that an adversary cannot decrypt those... http://www.freshpatents.com/Method-for-securely-extending-key-stream-to-encrypt-high-entropy-data-dt20080424ptan20080095370.php Wed, 30 Apr 2008 12:32:19 -0700 A stream stretcher is provided for securely expanding a key stream to match fee length of a data block to be encrypted and/or decrypted. A key stream is obtained having a length of LZ bits. A length LD corresponding, to a data block to be encrypted/decrypted is obtained, where LD>LZ.... http://www.freshpatents.com/Mobile-terminal-and-gateway-for-remotely-controlling-data-transfer-from-secure-network-dt20080424ptan20080095373.php Wed, 30 Apr 2008 12:32:19 -0700 A data transfer system including mobile terminals and gateways for transferring data from a secure network to an external network under remote control using the mobile terminals. A first gateway produces and sends a first key to a second gateway through first and second mobile terminals. The second gateway produces... http://www.freshpatents.com/Playback-apparatus-and-key-management-method-dt20080424ptan20080095372.php Wed, 30 Apr 2008 12:32:19 -0700 According to one embodiment, a playback apparatus includes a memory, a key deriving unit which derives first key information for decrypting the encrypted data, and a decrypting unit which decrypts the encrypted data by using the first key information derived by the key deriving unit. the key deriving unit produces... http://www.freshpatents.com/Method-and-system-for-setting-up-a-secure-environment-in-wireless-universal-plug-and-play--upnp--networks-dt20080424ptan20080095374.php Wed, 30 Apr 2008 12:32:19 -0700 The invention describes a method of setting up a secure environment in wireless Universal Plug and Play (UPnP) networks, comprising a UPnP security console and UPnP controlled devices defined in the UPnP Device Security specification, wherein the entry of information concerning the UPnP security bootstrap as required in the UPnP... http://www.freshpatents.com/Secret-information-management-apparatus-and-secret-information-management-system-dt20080424ptan20080095375.php Wed, 30 Apr 2008 12:32:19 -0700 In a secret information management system, a secret information management apparatus comprises a secret distribution unit which secretly distributes a data key k using a (k, n) threshold secret sharing scheme and creates n distributed keys B1, B2, . . . , Bn in the decryption of data D input...