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| Number | Title | Issue Date |
| 8175277 | Intercepting a communication session in a telecommunication network Intercepting a secure communication session includes distributing a key from a key distribution point to establish a secure communication session between a first endpoint and a second endpoint. A secure channel is established between the key distribution point and a... | 05/08/2012 |
| 8175278 | Key management messages for secure broadcast The present invention involves establishing a top-level key and optionally also a verification tag. The top-level key is used as the MDP key for encrypting a broadcast medium. Only the part of the key message that contains the encrypted top-level key is authenticate... | 05/08/2012 |
| 8170214 | QKD transmitter and transmission method In order to facilitate alignment of a QKD transmitter and QKD receiver, the transmitter is provided with a retro-reflector for returning to the receiver a photon beam originating at the latter. The transmitter is arranged to polarization modulate the retro-reflected... | 05/01/2012 |
| 8160257 | Tape failover across a cluster A security appliance that encrypts and decrypts information is installed in each of redundant multi-paths between a host system and a back up tape storage system. The host system is arranged to detect failures in a primary path to the tape system being used. When th... | 04/17/2012 |
| 8150040 | Key providing system, terminal device, and information processing method A terminal device improved with a digraph generation method in a key distribution method of various types of broadcast encryption systems is provided. The terminal device includes an acquiring unit for acquiring information related to a set, which is selected from a... | 04/03/2012 |
| 8150041 | Secure computation of private values An embodiment may include a system having a communication unit and a processing unit. The communication unit may be configured to receive an encrypted private value of a party, the encrypted private value being generated from a private value with a public-key encryp... | 04/03/2012 |
| 8144877 | Method and apparatus for updating a key in an active state A method for updating a key in an active state is disclosed according to the embodiments of the present invention. The method includes steps of: initiating a key update by a user equipment in the active state or a network side when a pre-defined condition is met; up... | 03/27/2012 |
| 8135134 | Systems and methods for managing cryptographic keys A common interface for managing cryptographic keys is provided. A request to manage a cryptographic key may be received in a first interface format, translated to a common interface format, and then executed remotely from the first interface. Return arguments may th... | 03/13/2012 |
| 8130964 | Systems and methods for identity-based encryption and related cryptographic techniques A method and system for encrypting a first piece of information M to be sent by a sender [100] to a receiver [110] allows both sender and receiver to compute a secret message key using identity-based information and a bilinear map. In a one embodiment,... | 03/06/2012 |
| 8130963 | Method and apparatus for secure key delivery for decrypting bulk digital content files at an unsecure site Rather than downloading each content document on demand from the publisher location to the user site, at the publisher location, each content document is encrypted and then multiple encrypted documents are assembled into a distribution archive that is itself encrypt... | 03/06/2012 |
| 8121295 | Method, apparatus, and system for controlling playout of media To manage playout of digital media by a media player, a wireless communication device (WCD) will include partitioned data storage including discrete partitions having distributor-modules corresponding with various media distributors, and including a digital rights m... | 02/21/2012 |
| 8107630 | Apparatus and method for managing stations associated with WPA-PSK wireless network Provided are a method and apparatus for managing a station by providing an encrypted key to the station in a wireless network under a Wi-Fi Protected Pre-Shared Key (WPA-PSK) environment. In the method, a registrar determines whether a new station is a guest station... | 01/31/2012 |
| 8098826 | QKD system laser autocalibration based on bit-error rate A method of autocalibrating the timing of the laser in a quantum key distribution (QKD) system is disclosed. The laser generates photon signals in response to a laser gating signals from a controller. The method includes first performing a laser gate scan to establi... | 01/17/2012 |
| 8098828 | 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 c... | 01/17/2012 |
| 8098827 | Data processing system, data processing method, and program providing medium The inventive data processing apparatus enables own memory device to store a plurality of key distribution approval data files each containing such a header data comprising a number of “link-count” data units each designating actual number of applicable contents... | 01/17/2012 |
| 8059819 | Systems and methods for distributing updates for a key at a maximum rekey rate A method for distributing updates for a key is described. One or more update requests are received per unit of time. The number of received update requests per unit of time is multiplied by a maximum update period to estimate the number of active nodes in a group. T... | 11/15/2011 |
| 8054974 | Opportunistic use of null packets during encryption/decryption The use of keys to encrypt data in a transmitter and to decrypt encrypted data in a receiver are synchronized in accordance with a synchronization signal that opportunistically replaces a null packet in an MPEG transport stream. Additionally or alternatively, key re... | 11/08/2011 |
| 8054975 | Method and system for managing key of home device in broadcast encryption (BE) system A method and a system for managing a key of a home device in a broadcast encryption system are provided. A hierarchical structure of a group set comprising a plurality of nodes corresponding to the home server and a plurality of nodes corresponding to the home devic... | 11/08/2011 |
| 8054973 | 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 lay... | 11/08/2011 |
| 8054976 | Quantum key distribution apparatus and method A quantum key distribution (QKD) system is provided that makes use of a quantum signal of polarized photons and comprises a QKD device and complimentary QKD apparatus. The QKD device has a QKD subsystem comprising one of a QKD transmitter and receiver for inter-work... | 11/08/2011 |
| 8050409 | Threshold and identity-based key management and authentication for wireless ad hoc networks As various applications of wireless ad hoc network have been proposed, security has become one of the big research challenges and is receiving increasing attention. The present invention provides for a distributed key management and authentication approach by deploy... | 11/01/2011 |
| 8050410 | Distributed encryption methods and systems A method and system for providing communication over arbitrary distances with a desired probability of security is disclosed. In accordance with one embodiment of the invention shares of a random key are encoded, the random key for effecting communication of a messa... | 11/01/2011 |
| 8045716 | System and method for the concealment of device input parameters A system and method for concealing input parameters that are being loaded into a device. In one embodiment, the system provides a transformed interface, in which a device into which the parameters are loaded contains a series of inverse transformation keys. The para... | 10/25/2011 |
| 8036387 | Method for the transmission of management data This invention relates to a method for the transmission of management data to at least one multimedia unit or a group of multimedia units. This method is characterized in that said management data is sent in the form of at least one authorization message encrypted b... | 10/11/2011 |
| 8023657 | Cryptography and certificate authorities in gaming machines The casino gaming system includes gaming machines and a gaming server having keys. A network bus interconnects the gaming machines and the gaming server. The network bus provides a communication link to transmit information between the gaming machine and the gaming ... | 09/20/2011 |
| 8023658 | Method and apparatus for updating a key in an active state A method for updating a key in an active state is disclosed according to the embodiments of the present invention. The method includes steps of: initiating a key update by a user equipment in the active state or a network side when a pre-defined condition is met; up... | 09/20/2011 |
| 8019084 | Automated banking machine remote key load system and method A card activated cash dispensing automated banking machine is provided that is operative to send a message to a host banking system, which message includes data representative of a request to transfer an encrypted terminal master key from the host banking system to ... | 09/13/2011 |
| 8014528 | Method for accessing a user operable device of controlled access A method is provided for accessing a user operable device having limited access ability. The method comprises transmitting an inquiry from a mobile device of a user via a wide area transmission network to a key authority for obtaining an access key for accessing fun... | 09/06/2011 |
| 8005226 | Information sending system, information sending device, information receiving device, information distribution system, information receiving system, information sending method, information receiving method, information distribution method, apparatus, sending method of information receiving device, playback method of apparatus, method of using contents and program storing medium Content data encrypted with a content key, the content key encrypted with an individual key specific to an information sending device, and the individual key encrypted with a distribution key that is updated in a predetermined cycle, and supplied are sent to an info... | 08/23/2011 |
| 7995762 | Key issuing method, group signature system, information processing apparatus, and program There is provided in accordance with the present invention a key issuing method for being performed by a user apparatus in a group signature system including the user apparatus and an issuer apparatus connected to the user apparatus through a network. ... | 08/09/2011 |
| 7995765 | Sharing a secret using hyperplanes over GF(q) A method and system distributes N shares of a secret among cooperating entities using hyperplanes over GF(q), such that the secret can be reconstructed from K of the N shares (where K≦N). In one embodiment, the method constructs a K-tuple that contains the secret ... | 08/09/2011 |
| 7995763 | User apparatus and program A user apparatus cannot acquire as many distribution keys Ki, . . . as a threshold value, to restore a content encryption key KM, unless it decrypts as many encrypted sub-content items as the threshold value after it has played back a sub-conte... | 08/09/2011 |
| 7995764 | Sharing a secret using hyperplanes over GF(2) A method and system distributes N shares of a secret among cooperating entities using hyperplanes over GF(2m), such that the secret can be reconstructed from K of the N shares (where K≦N). In one embodiment, the secret is represented as a secret bit str... | 08/09/2011 |
| 7983423 | Re-keying based on pre-generated keys A system and method for pre-generating encryption keys for re-keying stored ciphertext. The encryption keys are illustratively distributed to LKMs and therefrom to the security appliances communicating with each other. A minimum number of un-used pre-generated encry... | 07/19/2011 |
| 7983422 | Quantum cryptography A method of establishing a shared secret random cryptographic key between a sender and a recipient using a quantum communications channel is described. The method comprises: generating a plurality of random quantum states of a quantum entity, each random state being... | 07/19/2011 |
| 7978859 | Private and controlled ownership sharing The present invention relates to a method, a device and a system for preventing unauthorized introduction of content items in a network containing compliant devices and enabling users in the network to be anonymous. A basic idea of the present invention is to provid... | 07/12/2011 |
| 7957536 | Method for key administration for cryptography modules The invention relates to a method for a central key station (SS), for setting a new key (nK) in a cryptography module (KM) without a public key being stored in the cryptography module (KM), the authenticity of the new key (nK) being secured by a protocol. According ... | 06/07/2011 |
| 7940936 | Public key generation method in elliptic curve cryptography and public key generation system executing the method A public key generation method in Elliptic Curve Cryptography (ECC), and a public key generation system performing the method are provided. The public key generation method includes reducing a sequence length of the signed ternary τ-adic representation of the priva... | 05/10/2011 |
| 7940935 | Content playback apparatus, content playback method, computer program, key relay apparatus, and recording medium A content playback apparatus reduces load concentration on a specific server apparatus that manages content keys of encrypted content, while protecting copyrights of the content. The content apparatus makes playback of content recorded in a recording medium sold pos... | 05/10/2011 |
| 7933413 | Key exchange verification Key exchanges between peer-to-peer devices can be vulnerable to man in the middle attacks. Verification of the key exchanges can be made on a channel, network and/or device different from the channel, network and/or device used for the key exchange to determine whet... | 04/26/2011 |
