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| Number | Title | Issue Date |
| 6215877 | Key management server, chat system terminal unit, chat system and recording medium A key management server is arranged at the same position as a terminal unit as viewed from a chat server. A channel secret key unique to each channel is generated by the key management server and distributed to a chat client so that the communication can ... | 04/10/2001 |
| 6212281 | Digital signature protocol A digital signature protocol generates a signature component using a hash of an encrypted message. The component and encrypted message form a signature pair that is forwarded to a recipient. The encryption message is used to retrieve the encryption key at... | 04/03/2001 |
| 6209099 | Secure data processing method and system The present invention concerns a secure data processing method and system in which the user or operator of the system can trust that all of the software and hardware components of the system have been authenticated. The invention provides a data processing sys... | 03/27/2001 |
| 6175924 | Method and apparatus for protecting application data in secure storage areas A method, apparatus and computer program product are disclosed for certifying the authenticity of an application program and for securely associating certified application programs whose certification has been verified, with persistent application data th... | 01/16/2001 |
| 6161183 | Data verifying method apparatus for creating data to be verified and data verifying apparatus A token 12 creates utilization history information and sends the information to an information processing unit 11 and simultaneously creates an verification value and stores the value in a utilization-value holding unit 21. The information processing unit... | 12/12/2000 |
| 6148405 | Method and system for secure lightweight transactions in wireless data networks The present invention is a method and system for establishing an authenticated and secure communication session for transactions between a server and a client in a wireless data network that generally comprises an airnet, a landline network and a link ser... | 11/14/2000 |
| 6141422 | Secure cryptographic multi-exponentiation method and coprocessor subsystem A system for performing high speed exponentiation in a secure environment. The system includes an interface for receiving encrypted data sent from a host system, a plurality of exponentiators capable of operating concurrently, an encyptor decrypting data ... | 10/31/2000 |
| 6118874 | Encrypted data recovery method using split storage key and system thereof When a secret is encrypted and stored, it is necessary to provide a countermeasure for the situation where a key is lost (key recovery system). In the present invention, a key recovery system for an enveloped data format in which a common key is used to e... | 09/12/2000 |
| 6084969 | Key encryption system and method, pager unit, and pager proxy for a two-way alphanumeric pager network A method and system allows encryption services can be added to an existing wireless two-way alphanumeric pager network by providing a pager proxy which is arranged to receive an encrypted message from a sending pager and re-packages it for re-transmission... | 07/04/2000 |
| 6081893 | System for supporting secured log-in of multiple users into a plurality of computers using combined presentation of memorized password and transportable passport record A system is disclosed for controlling intelligible access to secured files by means of a user-memorized password in combination with a user-associated passport record. The passport record takes on two forms, one when it is physically secured within the wo... | 06/27/2000 |
| 6072876 | Method and system for depositing private key used in RSA cryptosystem A scheme for depositing a private key used in the RSA cryptosystem which is capable of maintaining the private key more safely, without requiring a user to always carry around a storage medium. In this scheme, a private key of a user is divided into a fir... | 06/06/2000 |
| 6061790 | Network computer system with remote user data encipher methodology Computer-implemented methodology is described which allows any user to access a "network client" machine (e.g., PC, ATM machine, cell phone, or the like) which is connected to a network but which does not know the authentication of the user. With only the... | 05/09/2000 |
| 6061448 | Method and system for dynamic server document encryption A method and system are provided for secure document delivery over a wide area network, such as the Internet. A sender directs a Delivery Server to retrieve an intended recipient's public key. The Delivery Server dynamically queries a certificate authorit... | 05/09/2000 |
| 6058193 | System and method of verifying cryptographic postage evidencing using a fixed key set A method for controlling keys used in the verification of encoded information generated by a transaction evidencing device and printed on a document comprises the steps of generating a plurality of random verifier master keys to obtain a set of verifier m... | 05/02/2000 |
| 6044468 | Secure transmission using an ordinarily insecure network communication protocol such as SNMP An encryption service in a manager encrypts network management information with a secret key that can be recognized by an agent to which the message is directed. The encryption service invokes an SNMP message transmission service in the manager to form a ... | 03/28/2000 |
| 6044154 | Remote generated, device identifier key for use with a dual-key reflexive encryption security system A security system is disclosed, which system is for granting access to a host computer in response to a demand from a remote computer. The security system has a permanent encryption key mounted on the remote computer. The software portion of the system pr... | 03/28/2000 |
| 6038322 | Group key distribution A method for distributing a secret key from a key holder H to intended group members M. The method assumes that during the distribution process each party, a group member M and the key holder H, can decrypt and encrypt exchanged information such that the ... | 03/14/2000 |
| 6028933 | Encrypting method and apparatus enabling multiple access for multiple services and multiple transmission modes over a broadband communication network The specification relates to the encryption of data transmitted over a broadband multiple access bi-directional hybrid fiber/coax (HFC) network. The method supports downstream broadcast encryption from headend to cable modem, and also provides for encrypt... | 02/22/2000 |
| 6009173 | Encryption and decryption method and apparatus A method for efficient encryption and decryption (100) comprises the steps of encrypting a message (104) at a sending unit which is to be sent to a receiving unit using a message key (106) and appending to the message at the sending unit the message key e... | 12/28/1999 |
| 6005938 | Preventing replay attacks on digital information distributed by network service providers A technique for preventing replay attacks on digital information distributed by network service providers. At the beginning of a subscription period for a service, a network service provider sends entitlement messages to the subscriber which provide the s... | 12/21/1999 |
| 6002768 | Distributed registration and key distribution system and method An online conference session management system includes computer sites associated with a conference session holder, a plurality of service providers and a plurality of conference session participants. The conference session holder and each service provide... | 12/14/1999 |
| 5999629 | Data encryption security module We have recognized that there is a strong need to control and maintain the secrecy of the intelligence that may be used by computers to communicate with another, for example, by encrypting the messages that they exchange with one another. Thus, the encryp... | 12/07/1999 |
| 5987124 | Method and apparatus for encrypting long blocks using a short-block encryption procedure A system for encrypting a plaintext block using a block encryption algorithm having a block size smaller than that of the plaintext block. The plaintext block is transformed into a masked plaintext block using an invertible transformation optionally depen... | 11/16/1999 |
| 5978482 | Method and system for protection of digital information An information processing system including an encryption processing logic module and a decryption processing logic module for enabling the encryption of digital information to be decrypted with a decryption key K. The encryption processing module includes... | 11/02/1999 |
| 5970147 | System and method for configuring and registering a cryptographic device A system and method for configuring and registering a cryptographic device. The configuration phase involves loading a device serial number (DSER) and a symmetric key (SK) into non-volatile memory of the cryptographic device. The non-volatile memory is in... | 10/19/1999 |
| 5956406 | Method of setting up secure communications and associated encryption/decryption system A method of establishing secure communication between users by means of a public key encryption/decryption system comprises the following steps: a center generates a pair of keys comprising a secret key and a public key, the center's public key is supplie... | 09/21/1999 |
| 5930362 | Generation of encryption key A set of Diffie-Hellman data encryption values is generated prior to receiving a request for the data encryption values. The data encryption values are then stored in a database. The generating and storing steps are performed repeatedly thus creating a st... | 07/27/1999 |
| 5892899 | Tamper resistant methods and apparatus In accordance with a first aspect of the present invention, a security sensitive program that operates with a secret is made tamper resistant by distributing the secret in space as well as in time. In accordance with a second aspect of the present inventi... | 04/06/1999 |
| 5883960 | Method of mobile unit registration and method of IC card registration for mobile communications system, and mobile unit, IC card, and IC card insertion type mobile unit implementing such methods To prevent illegal duplication of an ID containing type mobile unit, and illegal duplication of an IC card for an IC card insertion type mobile unit, in manufacturing a COB device, a public key KECOB, corresponding to a common secret key KD | 03/16/1999 |
| 5872846 | System and method for providing security in data communication systems A system and method for providing security in data communication systems where multiple users are coupled to a common receiving system. The data is encrypted or otherwise encoded by a sender using a key. The encrypted data is then scrambled or otherwise e... | 02/16/1999 |
| 5870470 | Method and apparatus for encrypting long blocks using a short-block encryption procedure A system for encrypting a plaintext block using a block encryption algorithm having a block size smaller than that of the plaintext block. The plaintext block is transformed into a masked plaintext block using an invertible transformation optionally depen... | 02/09/1999 |
| 5870475 | Facilitating secure communications in a distribution network In a hybrid fiber-coax distribution network, communications between a central station and particular end stations are encrypted using a working key (WK) of a symmetric encryption scheme. The central station has a public and private key (PPK) of a PPK encr... | 02/09/1999 |
| 5838792 | Computer system for centralized session key distribution, privacy enhanced messaging and information distribution using a split private key public cryptosystem An article of manufacture for effecting secure communications during a communications session between users in a secured communication cryptosystem in which users are each associated with a public crypto-key and a private crypto-key, includes computer rea... | 11/17/1998 |
| 5825890 | Secure socket layer application program apparatus and method A computer program product comprising: a computer useable medium having computer readable program code means embodied therein for encrypting and decrypting information transferred over a network between a client application program running in a client com... | 10/20/1998 |
| 5812671 | Cryptographic communication system In this system parties have network access to a network secure communications gateway which stores the current encryption/decryption algorithms and keys for parties registered with the network secure communications gateway. For party A to send an encrypte... | 09/22/1998 |
| 5809144 | Method and apparatus for purchasing and delivering digital goods over a network A method for purchasing and delivering goods over a network is comprised of the steps of identifying a digital good to be purchased. A purchase price for the digital good is negotiated. After the negotiation step, an authenticated purchase request is sent... | 09/15/1998 |
| 5784463 | Token distribution, registration, and dynamic configuration of user entitlement for an application level security system and method A shared secret key distribution system which enables secure on-line registration for services provided by an application server through an application level security system or firewall utilizes an authentication token containing a server public key. The ... | 07/21/1998 |
| 5761306 | Key replacement in a public key cryptosystem Improved key management is provided by a public key replacement apparatus and method for operating over insecure networks. An active public key and the mask of a replacement public key are provided by a key server to nodes where the active key is used to ... | 06/02/1998 |
| 5748735 | Securing E-mail communications and encrypted file storage using yaksha split private key asymmetric cryptography A method is provided for securing stored files in a system having a plurality of system users with each system user having an associated asymmetric crypto-key with a public key portion and a corresponding private key portion. Each public key portion is ac... | 05/05/1998 |
| 5737416 | Method and apparatus for enabling trial period use of software products: method and apparatus for utilizing a decryption stub A method and apparatus is provided in a data processing system for securing access to particular files which are stored in a computer-accessible memory media. A file management program is provided as an operating system component of the data processing sy... | 04/07/1998 |
