| 6332192 |
Generalized user identification and authentication system |
| Dec-18-2001 |
The invention features a method for providing a user access to a secure application. The invention stores in an encrypted form the authentication information necessary to satisfy the authentication requirements... |
| 6813357 |
Exclusive key sharing method |
| Nov-2-2004 |
In a set-up phase, the base station formulates the secret key S and holds it in secret. The secret information Si which are obtained by dividing the secret key S are distributed in secret to respective... |
| 6792545 |
Enterprise computer investigation system |
| Sep-14-2004 |
A method, apparatus and system for secure forensic investigation of a target machine by a client machine over a communications network. In one aspect the method comprises establishing secure communication... |
| 6381695 |
Encryption system with time-dependent decryption |
| Apr-30-2002 |
An object of the invention is to provide an encryption system and method for inhibiting the decryption of encrypted data unless a decryption condition is satisfied. Thus, according to the present invention,... |
| 6842523 |
Encryption apparatus, cryptographic communication system, key recovery system, and storage medium |
| Jan-11-2005 |
In an encryption apparatus for encrypting a data body to contain an encrypted data body in transmission data and transmitting the transmission data to a receiver, the transmission data includes sender's... |
| 4658292 |
Enciphering key distribution system for subscription TV broadcast or catv system |
| Apr-14-1987 |
An enciphering key distribution system comprises a transmitter having an address generator for generating the addresses of those subscribers to which a first enciphered TV signal is to be distributed.... |
| 6192131 |
Enabling business transactions in computer networks |
| Feb-20-2001 |
A system for creating a log of a conversation includes a convener computer and a plurality of conversation computers interconnected by a computer network. The system includes an arbiter computer and a... |
| 5870473 |
Electronic transfer system and method |
| Feb-9-1999 |
A system and method relating to secure communications in a communication network is disclosed. The invention uses sessions having limited duration to enable parties to communicate securely in the communication... |
| 6226618 |
Electronic content delivery system |
| May-1-2001 |
Disclosed is a method and apparatus of securely providing data to a user's system. The data is encrypted so as to only be decryptable by a data decrypting key, the data decrypting key being encrypted using... |
| 6049878 |
Efficient, secure multicasting with global knowledge |
| Apr-11-2000 |
A system for secure multicast including at least one sending entity operating on a sending computer system, the sending entity with a sending multicast application running on the sending computer system.... |
| 6263435 |
Dual encryption protocol for scalable secure group communication |
| Jul-17-2001 |
A logical tree structure and method for managing membership in a multicast group provides scalability and security from internal attacks. The structure defines key groups and subgroups, with each subgroup... |
| 5245658 |
Domain-based encryption |
| Sep-14-1993 |
A domain-based encryption system which uses identical domains known only to the parties involved in the communication. An encrypted message is sent between communicating parties which consists of a stream... |
| 6584566 |
Distributed group key management for multicast security |
| Jun-24-2003 |
A method and apparatus for distributed group key management for multicast security. According to one aspect of the invention, an initiator key server distributes to a plurality of key servers a first key... |
| 6230269 |
Distributed authentication system and method |
| May-8-2001 |
An authentication system for a distributed network having multiple clients and a server enables a user to log on at any one of the clients with a password and receive his/her associated public/private... |
| 6182218 |
Digital content management system using electronic watermark |
| Jan-30-2001 |
A system for managing a digital content, particularly a digital content to which a copyright is claimed, and a system for supplying a public-key which is used in the management of the digital content are... |
| 6728878 |
Deferred billing, broadcast, electronic document distribution system and method |
| Apr-27-2004 |
An electronic document delivery system and method in which a broadcast center periodically sends a "catalog" of available documents to a receiving computer, thereby allowing a user to browse through the... |
| 6337911 |
Deferred billing, broadcast, electronic document distribution system and method |
| Jan-8-2002 |
An electronic document delivery system and method in which a broadcast center periodically sends a "catalog" of available documents to a receiving computer, thereby allowing a user to browse through the... |
| 6076077 |
Data management system |
| Jun-13-2000 |
A system for dealing in an original data content and an edited data content. A data content is handled as an object, and the data content is edited by editing a data content, functioning as an object,... |
| 6002772 |
Data management system |
| Dec-14-1999 |
To prevent piracy or leakage of data content, a cryptography technique and electronic watermark technique are combined together and used. In a data content supplied to a user, a user data is entered as... |
| 5568551 |
Data management method and system thereof |
| Oct-22-1996 |
To enable management by a center of data transferred to a user terminal from the center, an ISDN, which has a call connecting means which forms a signal channel before forming a data channel between a... |
| 6343283 |
Data copyright management system |
| Jan-29-2002 |
A data copyright management system is provided, in which a primary user edits a received data and supplies the edited data to a secondary user. The copyright management system comprises a database and... |
| 6069952 |
Data copyright management system |
| May-30-2000 |
A data copyright management system comprises a database for storing original data, a key control center for managing crypt keys, copyright management center for managing data copyrights, and a communication... |
| 5848158 |
Data copyright management system |
| Dec-8-1998 |
A data copyright management system is provided, in which a primary user edits a received data and supplies the edited data to a secondary user. The copyright management system comprises a database and... |
| 7039617 |
Currency and float ID tracking in an electronic purse |
| May-2-2006 |
The present invention relates to electronic purse systems, and in particular it relates to the improved management of multiple money flows in such systems. According to the basic principles of the present... |
| 5265164 |
Cryptographic facility environment backup/restore and replication in a public key cryptosystem |
| Nov-23-1993 |
A computer apparatus, program and method function in a data processing system to replicate a cryptographic facility. The system includes a first cryptographic facility containing a portable part which... |
| 6490352 |
Cryptographic elliptic curve apparatus and method |
| Dec-3-2002 |
An apparatus for operating a cryptographic engine may include a key generation module for creating key pairs for encrypting substantive content to be shared between two users over a secured or unsecured... |
| 6788788 |
Cryptographic communication method, encryption method, and cryptographic communication system |
| Sep-7-2004 |
A novel cryptographic communication system including ID-NIKS system with high security. Secret key generation functions and key sharing functions are not separable. Key sharing is also probabilistically... |
| 5144665 |
Cryptographic communication method and system |
| Sep-1-1992 |
A cryptographic communication method and system for performing cryptographic communication between a host computer and a given one of plural terminals connected to the host computer by way of a communication... |
| 5677954 |
Cryptical control method for personal communication |
| Oct-14-1997 |
When an incoming call corresponding to a communication number PID takes place in a switching station, the switching station retrieves user-intrinsic information UK and an incoming-communication registered... |
| 6625734 |
Controlling and tracking access to disseminated information |
| Sep-23-2003 |
A method for controlling and tracking access to disseminated information involves encrypting data using a key that is maintained in a key repository. A user requests a message ID and key from the key repository.... |
| 6668326 |
Context saving system |
| Dec-23-2003 |
A method for performing a computation task in a secure processor removably operatively associated with a host including a memory external to the secure processor. The method includes computing a portion... |
| 5588059 |
Computer system and method for secure remote communication sessions |
| Dec-24-1996 |
A computer system includes a Key Certification Agency (KCA) (12), a host computer (16), and a number of remote terminals (14). The KCA (12) uses incompatible encryption processes (96, 98) to encrypt session... |
| 6816899 |
Communications system |
| Nov-9-2004 |
A communications system comprising one or more servers and one or more clients. The servers are connected to the clients, for the provision of information to the clients. Each server is operative for sending... |
| 5832092 |
Communication system based on shared cipher key, server unit for the same system, client unit for the same system, and method of sharing cipher key in communication system |
| Nov-3-1998 |
A communication system which is capable of proper cipher communications with many and unspecific parties and of making all the entities share a common key and which does not require the change of its own... |
| 4961221 |
Communication method and system with encryption of information |
| Oct-2-1990 |
An information encryption method particularly intended for a communication system in which bidirectional multiplexed communications of the point-to-multipoint type are derived between a switching exchange... |
| 5029208 |
Cipher-key distribution system |
| Jul-2-1991 |
A cipher-key distribution system used in a one-way communication from a first party to a second party. The cipher-key distribution system is composed of a first subsystem, a second subsystem, and a common... |
| 4984271 |
Cipher system with closed cipher procedure |
| Jan-8-1991 |
A cipher system in a computer network having a host computer and terminal equipments connected by communication lines. A terminal equipment cipher process program memory area is provided in a volatile... |
| 7039191 |
Chaining key broadcasting reception system and chaining key broadcasting reception method |
| May-2-2006 |
In the chaining key broadcasting reception system, a chaining key reception unit receives a chaining key, an identifier of the key in question and a target key identifier indicative of a chaining key to... |
| 6996711 |
Certification validation system |
| Feb-7-2006 |
A certificate validation mechanism is provided for a network interface. The certificate validation mechanism maintains a certificate cache containing local copies of certificates with associated validity... |
| 5663896 |
Broadcast key distribution apparatus and method using Chinese Remainder |
| Sep-2-1997 |
A communication system utilizing low bandwidth requirements for transmitting an encoded value formulated using the Chinese Remainder procedure to receivers having a private key. The system offers the advantages... |
| 5999623 |
Broadcast data access controller communication system |
| Dec-7-1999 |
Disclosed is a method and apparatus for enabling an authorized receiver station to decrypt encrypted information broadcast by a transmitter station, and for decrypting the information within the authorized... |
| 6904406 |
Audio playback/recording apparatus having multiple decoders in ROM |
| Jun-7-2005 |
An audio playback/recording apparatus includes an audio input processing section which receives analog audio data, and converts the analog audio data to digital audio data; a playback/recording processing... |
| 6986054 |
Attack-resistant implementation method |
| Jan-10-2006 |
The present invention makes it difficult for unauthorized parties to estimate processing and a secret key based upon the waveforms of power consumption of an IC card chip by changing a processing order... |
| 6212280 |
Apparatus and methods for managing key material in heterogeneous cryptographic assets |
| Apr-3-2001 |
Apparatus and methods for managing key material in cryptographic assets are disclosed. The methods can include defining first key material to be delivered to a cryptographic asset, wherein the first key... |
| 5590200 |
Apparatus and method for securing communication systems |
| Dec-31-1996 |
A hacking prevention system and method wherein the descrambler receives a data stream including a series of authorization packets and a series of corresponding offset values. A random number is generated... |
| 5787172 |
Apparatus and method for establishing a cryptographic link between elements of a system |
| Jul-28-1998 |
A secure cryptographic network is established among operational units in a system. A public key cryptosystem is initially used to establish secure communication links. Then, each secure communication link... |
| 6094487 |
Apparatus and method for encryption key generation |
| Jul-25-2000 |
An encryption key generation system generates encryption keys at both an originating terminal and a terminating terminal of a wireless network. A central controller generates a shared secret based on the... |
| 6845160 |
Apparatus and method for depositing encryption keys |
| Jan-18-2005 |
An encryption key depositing apparatus comprising a unit that generates an encryption key for a user; and a unit that starts a process in response to the generation of the encryption key, the process allowing... |
| 6260142 |
Access and storage of secure group communication cryptographic keys |
| Jul-10-2001 |
A method and apparatus for secure group communication detects the deletion of a member of the group and uses the detected deletion to update the security credentials of a group by updating a repository... |
| 6256733 |
Access and storage of secure group communication cryptographic keys |
| Jul-3-2001 |
A method and apparatus for secure group communication allows on-demand procurement of stored security credentials of a group. In one embodiment, this is done by having a processor store at least a portion... |
