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| Number | Title | Issue Date |
| 8121296 | Method and apparatus for security in a data processing system Method and apparatus for secure transmissions. Each user is provided a registration key. A long-time updated broadcast key is encrypted using the registration key and provided periodically to a user. A short-time updated key is encrypted using the broadcast key and ... | 02/21/2012 |
| 8068613 | Method and apparatus for remotely provisioning software-based security coprocessors A virtual security coprocessor is created in a first processing system. The virtual security coprocessor is then transferred to a second processing system, for use by the second processing system. For instance, the second processing system may use the virtual securi... | 11/29/2011 |
| 8000478 | Key handshaking method and system for wireless local area networks A key handshake method in a wireless local area network (LAN) capable of performing authentication between two wirelessly connected stations by exchanging keys once is provided. Because the security key for authentication can be exchanged by one 4-way handshake betw... | 08/16/2011 |
| 7945053 | Methods and apparatus for a keying mechanism for end-to-end service control protection Embodiments of the present invention provide methods and apparatus for a keying mechanism for end-to-end service control protection within wireless networks. Other embodiments may be described and claimed. ... | 05/17/2011 |
| 7936883 | Quantum key distribution protocol A quantum key distribution protocol is provided that reduces the maximum value of the leaked information amount over the same distance when an adversary makes a photon number splitting attack more than the reduction by the BB84 protocol and the SARG protocol, by mak... | 05/03/2011 |
| 7873169 | Methods, devices and systems for generating anonymous public keys in a secure communication system Methods, devices and systems for generating a plurality of public keys from one private key with the same generator of a group are described. A public key cryptosystem is also disclosed for generating a plurality of anonymous public keys all of which relate to the s... | 01/18/2011 |
| 7869605 | Method for generating group key A method is provided for generating a group key, including sharing a plurality of secret keys with a plurality of nodes adjacent to a first node of the plurality of nodes, obtaining a plurality of function values using the plurality of secret keys and a result value... | 01/11/2011 |
| 7853020 | Systems and methods for enhanced quantum key formation using an actively compensated QKD system Systems and methods for enhanced quantum key distribution (QKD) using an actively compensated QKD system. The method includes exchanging quantum signals between first and second QKD stations and measuring the quantum signal error. An error signal SE repre... | 12/14/2010 |
| 7835528 | Method and apparatus for refreshing keys within a bootstrapping architecture An approach is provided for refreshing keys in a communication system. An application request is transmitted to a network element configured to provide secure services. A message is received, in response to the application request, indicating refreshment of a key th... | 11/16/2010 |
| 7778423 | Method for establishing a common key for a group of at least three subscribers A method for establishing a common key for a group of at least three subscribers includes using a publicly known mathematical number group and a higher order element of the group g∈G. In the first step, a message corresponding to Ni: =gzi mod p is sent ... | 08/17/2010 |
| 7764795 | Key-exchange protocol using a password-derived prime One embodiment of the present invention provides a system that uses a password-derived prime number to facilitate a secure key exchange between a client and a server across a network. During operation, the client receives a password from a user. Next, the client use... | 07/27/2010 |
| 7760885 | Method of distributing encryption keys among nodes in mobile ad hoc network and network device using the same A method of distributing encryption keys among nodes in a mobile ad hoc network, and a network device using the same. In particular, a method of distributing encryption keys, which guarantees the security of a ciphertext in the mobile ad hoc network. The method of d... | 07/20/2010 |
| 7649998 | Facilitating secure data communications that use key-based encryption There is disclosed a method, apparatus, computer program and computer program product for facilitating secure data communications. The secure data communications is carried out using a secret key for encrypting data flowing between first and second entities over a c... | 01/19/2010 |
| 7636442 | Method and apparatus for migrating software-based security coprocessors A first processing system determines whether a second processing system provides a trustworthy state for supporting a virtual security coprocessor. In response to determining that the second processing system provides a trustworthy state for supporting the virtual s... | 12/22/2009 |
| 7606371 | Two-way QKD system with active compensation A two-way actively stabilized QKD system that utilizes control signals and quantum signals is disclosed. Because the quantum signals do not traverse the same optical path through the system, signal collisions in the phase modulator are avoided. This allows the syste... | 10/20/2009 |
| 7548623 | Communication system, communication device, and communication method One and the other communication terminals for performing wireless communication are connected by a cable. The one communication terminal performs control so that an encryption key is transmitted from the one communication terminal to the other communication terminal... | 06/16/2009 |
| 7519184 | Wireless communication system A small-scale wireless communication system offering advanced security level. An encryption key memory of an access point stores an encryption key list of a plurality of different encryption keys. A change information transmitter periodically transmits change inform... | 04/14/2009 |
| 7502476 | Systems and methods of enhancing QKD security using a heralded photon source Systems and method of enhancing the security of a QKD system having operably coupled QKD stations (Alice, Bob) using correlated photon pulses (P1, P2) are disclosed. The method includes generating the correlated photon pulses at Alice and detecting one... | 03/10/2009 |
| 7492905 | Rolling code security system A rolling code transmitter is useful in a security system for providing secure encrypted RF transmission comprising an interleaved trinary bit fixed code and rolling code. To provide even greater security, the transmitter is limited in the number of times it may per... | 02/17/2009 |
| 7436966 | Secure approach to send data from one system to another A secure approach for sending a original message from a sender to a receiver. The sender may encrypt the original message by performing an XOR (or XNOR) operation of the original message and a first random message (same size as original message) on a bit by basis to... | 10/14/2008 |
| 7437768 | Information processing apparatus and method, and program storage medium The CPU 11 of the personal computer 1 controls the CPU 32 of the adaptor 26 made of a semiconductor ID to compute a hash value of a content-managing music data base recorded in the HDD 21 and store it into the nonvolatile memory | 10/14/2008 |
| 7434046 | Method and apparatus providing secure multicast group communication An approach for establishing secure multicast communication among multiple members that participate in a multicast group is disclosed. In one feature, multiple multicast proxy service nodes (MPSNs) are defined and control when members join or leave the multicast gro... | 10/07/2008 |
| 7426382 | Contact validation and trusted contact updating in mobile wireless communications devices A method in a wireless communication device including receiving contact information with a signature from a source (310) not on a trusted contact list, validating (362) the signature by comparing the signature to an reference signature stored on the me... | 09/16/2008 |
| 7424615 | Mutually authenticated secure key exchange (MASKE) The invention provides a cryptographic method which includes receiving at a first entity a second public key MA. At least one of a first session key KB and a first secret SB may be generated based on the second public key MA | 09/09/2008 |
| 7421080 | Method of reconstructing a secret, shared secret reconstruction apparatus, and secret reconstruction system Secret information is shared by a group of members by giving each member a first share of the information. To reconstruct the secret information, a subgroup consisting of some or all of the members generate second shares from their first shares, and distribute the s... | 09/02/2008 |
| 7421082 | Data delivery method and data delivery system using sets of passkeys generated by dividing an encryption key A data delivery system providing multipoint delivery of encrypted digital data to specific destinations. A plurality of pieces of key information are generated on the basis of an encryption key specific to each digital data item to be delivered. The multiple pieces ... | 09/02/2008 |
| 7415114 | Quantum key system and method This invention provides a quantum key distribution (QKD) system and method for determining initial quantum keys (QKs), including an initial QKA (220) and an initial QKB (230), determining an initial QKA value of a first function applied to said initial... | 08/19/2008 |
| 7409562 | Method and apparatus for encrypting media programs for later purchase and viewing A system and method for storing and retrieving program material for subsequent replay is disclosed. The method includes accepting a receiver ID associated with a receiver key stored in a memory of the receiver, determining a pairing key for encrypting communications... | 08/05/2008 |
| 7404079 | Automatic identity protection system with remote third party monitoring This invention provides an automated system for the processing of data packets, composed of personal identifiers and personal data, such that the personally identifiable data sent by one party may be considered anonymous once received by a second party. The inventio... | 07/22/2008 |
| 7400733 | Key refresh at the MAC layer A method for encrypted communications between a first transceiver and a second transceiver is provided. The method includes sending from a first transceiver to a second transceiver a request to initiate derivation of a new encryption key. The request to initiate a n... | 07/15/2008 |
| 7380138 | Cryptographic method and apparatus First data to be sent by a first party to a second party is encrypted using an encryption key that is formed using at least a hash value generated by a keyed hash of at least one condition that typically serves as an identifier of an intended recipient of the first ... | 05/27/2008 |
| 7373507 | System and method for establishing secure communication A system and method is described in which two parties communicate a first shared random number and a second shared random number, and each independently use a combining function with inputs including the two shared random numbers to obtain a shared secret key. Secur... | 05/13/2008 |
| 7366915 | Digital license with referral information A digital license corresponds to encrypted digital content and includes a content key for decrypting same. The content key is encrypted and is decryptable by a decryption key available only to the first persona, the license thereby being tied to the first persona. T... | 04/29/2008 |
| 7363511 | Method for processing audiovisual information in an electronic device, a system, and an electronic device A method for processing audiovisual information in an electronic device comprises at least one control block for controlling the operation of the electronic device, and a memory. The audiovisual information is encrypted. The control block is provided with a protecte... | 04/22/2008 |
| 7359513 | Quantum cryptography protocol An apparatus and method for implementing a quantum cryptography system encoding bit values on approximations of elementary quantum systems with provable and absolute security against photon number splitting attacks. The emitter encodes the bit values onto pairs of n... | 04/15/2008 |
| 7359518 | Distribution of secured information Secured information is stored on a server accessible to a network. A first access component that is required to permit use of the secured information is distributed to a delegate. In the absence of a second access component, the first access component is not suffici... | 04/15/2008 |
| 7360084 | System, device, and method for controlling access in a multicast communication network A system, device, and method for controlling access in a multicast communication network uses a centralized host authentication scheme to prevent unauthorized hosts from joining a shared multicast distribution tree. Each authorized host is allocated a unique authent... | 04/15/2008 |
| 7359491 | Saving information from information retrieval systems A method and system for allowing a calling party to save information obtained from an information retrieval system. The caller may select options to save the information to a memory location, e.g., the caller's own network-based voice mail system or a temporary voic... | 04/15/2008 |
| 7352866 | Enhanced subscriber authentication protocol The present invention provides a method of authenticating a pair of correspondents in a communication system, such as in a mobile phone network by utilizing a blend of public-key cryptography and symmetric cryptography. Each session between the mobile phone and the ... | 04/01/2008 |
| 7349545 | Key agreement method in secure communication system using multiple access method A key agreement method for secure communication in a multiple access system is provided. A key agreement method for secure communication in a multiple access system, the key agreement method includes the steps of (a) a first user, modulating signals from a so... | 03/25/2008 |
