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Class 380/279 - Key distribution center


Subclass of Class 380 - Cryptography
Definition: Subject matter wherein distribution of a key is from
No. of patents: 385
Last issue date: 12/20/2011


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NumberTitleIssue Date
8081761Communication 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
8059820Multi-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
8050411Method 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
8041039Secret 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
8005227Key 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
7995766Group 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
7965845System 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
7965846Client 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
7957537Information 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
7949136Security 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
7933414Secure 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
7925026Systems 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
7899187Domain-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
7885412Pre-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
7860255Content 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
7860254Computer 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
7848526Method 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
7813510Key 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
7711120Cryptographic 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
7706540Content 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
7653201Implicit 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
7627126Systems 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
7620187Method 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
7599497Key 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
7542573Providing 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
7539315Encrypted 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
7499551Public 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
7483537Selecting 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
7477748Session 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
7443986Key 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
7437568Apparatus 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
7437561Authentication 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
7437553Systems 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
7434047System, 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
7430542System 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
7428637Dynamic 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
7421079Method 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
7421083System 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
7418474Secure 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
7415614Cryptographic 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
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