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| Number | Title | Issue Date |
| 8081761 | Communication encryption processing apparatus A communication encryption processing apparatus is provided in which a dedicated signal line is provided between a key management module and an encryption and decryption processing module to perform a key delivery via the dedicated signal line from the key managemen... | 12/20/2011 |
| 8059820 | Multi-factor content protection Protecting content. A recipient receives content from a publisher. Some content is managed by an access server. The access server controls the recipient's use of managed content through interaction with a trusted agent at the recipient. The content is encrypted to a... | 11/15/2011 |
| 8050411 | Method of managing one-time pad data and device implementing this method A device stores one-time pad data for use in carrying out various tasks. In order to preserve the ability to carry out important tasks that require the use of one-time data, use of the one-time pad data held by the device is controlled such that an amount of this on... | 11/01/2011 |
| 8041039 | Secret communications system and channel control method A secret communications system realizes point-to-multipoint or multipoint-to-multipoint connections of both quantum channels and classical channels. Multiple remote nodes are individually connected to a center node through optical fiber, and random-number strings K | 10/18/2011 |
| 8005227 | Key information consistency checking in encrypting data storage system A data storage system employs data encryption to increase data security, and techniques for ensuring consistency of key information maintained and used throughout the system to reduce the likelihood that data will become non-recoverable due to the use of an incorrec... | 08/23/2011 |
| 7995766 | Group subordinate terminal, group managing terminal, server, key updating system, and key updating method therefor Provided is a group subordinate terminal in a key updating system that includes a server and a group of terminals including: a group managing terminal; and group subordinate terminals including the group subordinate terminal, the group subordinate terminal comprisin... | 08/09/2011 |
| 7965845 | System and methods for efficient authentication of medical wireless ad hoc network nodes A medical ad hoc wireless network (10) is deployed in a healthcare medical facility surrounding individual patients and including wireless nodes (A, B, . . . , Z). Before deployment, each node (A, B, . . . , Z) is pre-initialized with a public key certificate... | 06/21/2011 |
| 7965846 | Client distributed system and inter-client RTP encrypting method When an SIP interface unit of a server apparatus receives an SIP message for call connection from a client apparatus and an SIP message analyzing unit can confirm that the SIP message is normal, a call controller recognizes that an RTP communication is carried out b... | 06/21/2011 |
| 7957537 | Information processing system and method using encryption key block An information processing system and method using an encryption key block sets sub-trees classified based on data processing ability of the devices (capability) in a key tree in which respective keys are corresponded to a root, nodes and leaves of a tree in which a ... | 06/07/2011 |
| 7949136 | Security circuit having an electrical fuse ROM A security circuit includes an electrical fuse read only memory (ROM) including a plurality of electrical fuse units. The electrical fuse units are arranged to correspond to bit values of an initial security key before the electrical fuse ROM is programmed. ... | 05/24/2011 |
| 7933414 | Secure data distribution Data encrypted with a scrambling key Ks are transmitted from a service provider via a master device to a plurality of client devices having unique identifiers, administered by the master device. A set of partial keys comprising a respective partial key for each resp... | 04/26/2011 |
| 7925026 | Systems and methods for providing autonomous security Systems and methods for providing autonomous security are configured to modify an original header associated with an original data packet wherein key information is added; encrypt original data associated with the original data packet in response to the key informat... | 04/12/2011 |
| 7899187 | Domain-based digital-rights management system with easy and secure device enrollment New devices (101) are added to an existing domain by obtaining domain information (e.g., domain name and private domain password) from devices (101) already in the domain that preferably are in close proximity. Once the domain information has been tran... | 03/01/2011 |
| 7885412 | Pre-generation of generic session keys for use in communicating within communications environments Generic session keys are pre-generated and stored in a pool of session keys for later use in communicating within a communications environment. The session keys that are stored in the pool are pre-encrypted with the private key of the entity storing those keys. To c... | 02/08/2011 |
| 7860255 | Content distribution server, key assignment method, content output apparatus, and key issuing center A content distribution system distributes contents. The content distribution system includes a key issuing center, a server, eight output apparatuses, and a communication path that connects them to each other. The key issuing center and each of the output apparatuse... | 12/28/2010 |
| 7860254 | Computer system security via dynamic encryption A dynamic computer system security method and system using dynamic encryption and full synchronization between system nodes. A data record from a data stream created by a source user is encrypted with an initial dynamic session key. A new dynamic session key is gene... | 12/28/2010 |
| 7848526 | Method of receiving session key in home network and method of reproducing content using the same A method of receiving a session key in a home network and a method of reproducing content using the same. The method of receiving a session key from a home server in a home network, includes: (a) whenever one of members of the home network changes, receiving and sto... | 12/07/2010 |
| 7813510 | Key management for group communications A system for key management for a plurality of nodes includes: a first key generation device (130) for generating a first set of secret keys for secure communication between the plurality of nodes; a second key generation device (130) for generating a ... | 10/12/2010 |
| 7711120 | Cryptographic key management A cryptographic coalition administrator for managing information access across multiple organizations includes a communications interface configured to communicate electronically transmit and receive information, a memory configured to store pairs of public and priv... | 05/04/2010 |
| 7706540 | Content distribution using set of session keys A method includes generating a set of session keys and encrypting content utilizing the set of session keys to generate encrypted content. The set of session keys is transmitted. The encrypted content is transmitted to a content destination, so as to enable the cont... | 04/27/2010 |
| 7653201 | Implicit certificate scheme A method of a trusted entity CA facilitating generation of a public key by an entity A in an electronic data communication system using implicit certificates. The trusted entity CA selects a unique identity distinguishing the entity A. The trusted entity CA then gen... | 01/26/2010 |
| 7627126 | Systems and methods for implementing path length control for quantum cryptographic systems A quantum cryptographic key distribution (QKD) endpoint (405) includes a QKD receiver and a feedback system (1600). The QKD receiver receives symbols transmitted over a QKD path. The feedback system (1600) controls a length of the QKD path based... | 12/01/2009 |
| 7620187 | Method and apparatus for ad hoc cryptographic key transfer Method and apparatus for obtaining a cryptographic key by dispatching a key request to a communications channel, receiving a response from one or more key sources, selecting a key source according to the received responses, preparing a requester credential, communic... | 11/17/2009 |
| 7599497 | 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 ... | 10/06/2009 |
| 7542573 | Providing apparatus, communication device, method, and program A providing apparatus provides information required for secure communication to first and second devices. The providing apparatus includes a receiving unit that receives a first parameter used by the first device for the secure communication and a second parameter u... | 06/02/2009 |
| 7539315 | Encrypted communication system, key delivery server thereof, terminal device and key sharing method Provided is a method for updating a group key in a highly secure manner and at high speed. A method includes: a step of making subscriber terminals (20) perform a part of decryption of an encrypted group key used to decrypt the information before distribution... | 05/26/2009 |
| 7499551 | Public key infrastructure utilizing master key encryption The disclosure encrypts and decrypts data using public key infrastructure with and allows an authorized third party to access and decrypt the encrypted data as required without requiring private key escrow. The disclosure utilizes a user private key, a user public k... | 03/03/2009 |
| 7483537 | Selecting cached RSA keys in response to RSA key requests A method of responding to a request for a key of a first length is provided. According to the method, the request for the key of the first length is received. Moreover, it is determined whether any one of a plurality of cached keys satisfies the request. If any one ... | 01/27/2009 |
| 7477748 | Session key distribution methods using a hierarchy of key servers Methods, apparatuses, media and signals for facilitating secure communication between a first device and a second device are disclosed. One method includes automatically identifying a common key server potentially accessible by both the first and second devices, and... | 01/13/2009 |
| 7443986 | Key allocating method and key allocation system for encrypted communication Both a management server and a validation server are installed. Both a terminal and a terminal register setting information which is usable in an encrypted communication in the management server. When carrying out the encrypted communication, the management server s... | 10/28/2008 |
| 7437568 | Apparatus and method for establishing trust Computer apparatus comprising a receiver for receiving an integrity metric for a computer entity via a trusted device associated with the computer entity, the integrity metric having values for a plurality of characteristics associated with the computer entity; a co... | 10/14/2008 |
| 7437561 | Authentication of data transmitted in a digital transmission system A method of authenticating data transmitted in a digital transmission system, in which the method comprises the steps, prior to transmission, of determining at least two encrypted values for at least some of the data, each encrypted value being determined using a ke... | 10/14/2008 |
| 7437553 | Systems and methods for providing autonomous security Systems and methods for providing autonomous security are configured to modify an original header associated with an original data packet wherein key information is added; encrypt original data associated with the original data packet in response to the key informat... | 10/14/2008 |
| 7434047 | System, method and computer program product for detecting a rogue member in a multicast group A system for multicasting a data packet in a multicast group includes a network entity, and a plurality of members of the multicast group. A member can notify the network entity of a rogue member of the group claiming an identity of a spoofed member of the group. In... | 10/07/2008 |
| 7430542 | System and method for activating a rendering device in a multi-level rights-management architecture A digital rights management system for the distribution, protection and use of electronic content. The system includes a client architecture which receives content, where the content is preferably protected by encryption and may include a license and individualizati... | 09/30/2008 |
| 7428637 | Dynamic authentication and initialization method A method for authentication of a first client in communication with a second client via an authentication server is disclosed, such that the first client and the second client are authenticated to each other, and the authentication server is authenticated to both th... | 09/23/2008 |
| 7421079 | Method and apparatus for secure key replacement A method, and a corresponding apparatus, provide for remote, secure replacement of private keys in a private key infrastructure. The method is implemented as a secure key replacement protocol (SKRP), which includes the steps of receiving a rekey request, where the r... | 09/02/2008 |
| 7421083 | System for seamlessly updating service keys with automatic recovery Application servers are programmed such that when an application server changes a compromised service key, the compromised key is saved by the application server until all tickets that may have been issued under the compromised key expire. Whenever the application s... | 09/02/2008 |
| 7418474 | Secure identification system Methods and apparatus are described which provide secure interactive communication of text and image information between a central server computer and one or more client computers located at remote sites for the purpose of storing and retrieving files describing and... | 08/26/2008 |
| 7415614 | Cryptographic authentication with ephemeral modules A method for enabling a personal computer to be authenticated by a server is provided. The method comprises the step, which includes for the user in launching the execution of a log-on procedure software, introducing personal identifiers providing access to a signat... | 08/19/2008 |
