| 6263437 |
Method and apparatus for conducting crypto-ignition processes between thin client devices and server devices over data networks |
| Jul-17-2001 |
A crypto-ignition process is needed to establish an encrypted communication protocol between two devices connected by an insecure communication link. The present invention introduces a method of creating... |
| 6240188 |
Distributed group key management scheme for secure many-to-many communication |
| May-29-2001 |
A group key management system and method for providing secure many-to-many communication is presented. The system employs a binary distribution tree structure. The binary tree includes a first internal... |
| 6222923 |
Method for securing system protected by a key hierarchy |
| Apr-24-2001 |
A method for securing a system protected by a predefined hierarchy of cryptographic keys, and in particular, for securing a pay TV system, against unauthorized users. An individual cryptographic key assigned... |
| 6209098 |
Circuit and method for ensuring interconnect security with a multi-chip integrated circuit package |
| Mar-27-2001 |
Circuitry implemented within a multi-chip module comprising a first integrated circuit chip and a second integrated circuit chip coupled together through an interconnect. Both the first and second integrated... |
| 6195432 |
Software distribution system and software utilization scheme for improving security and user convenience |
| Feb-27-2001 |
A software distribution system and a software utilization scheme for effectively preventing an illegal copy or a software is difficult while improving a convenience of a user. At a user side, a shared... |
| 6192132 |
Short term internet access |
| Feb-20-2001 |
Allowing a service vendor to establish a set of Internet access accounts with an Internet service provider and to have the capability of activating or deactivating an Internet access account by directly... |
| 6169805 |
System and method of operation for providing user's security on-demand over insecure networks |
| Jan-2-2001 |
Secure communication may be conducted between two or more parties over a network, e.g the Internet without prior security arrangements among the parties or agreed to encryption/decryption software. A sending... |
| 6108424 |
Mobile radio telephone station comprising a protection system for at least one authentication number and method of protecting an authentication number |
| Aug-22-2000 |
The mobile station comprises Traffic Identification Encryption means (TIE) and a memory (54) for storing at least one authentication number (A-key). According to the invention, the protection system comprises... |
| 6078888 |
Cryptography security for remote dispenser transactions |
| Jun-20-2000 |
The invention relates to providing secure transactions with a tag and POS device associated with a host network authorization system. In doing so, the tag is adapted to bi-directionally communicate with... |
| 6069957 |
Method and apparatus for providing hierarchical key system in restricted-access television system |
| May-30-2000 |
An encryption system for restricted-access television systems. Decryption keys, which are used to decrypt program material, are transmitted to customers in a restricted-access television system. The keys... |
| 6058193 |
System and method of verifying cryptographic postage evidencing using a fixed key set |
| May-2-2000 |
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... |
| 6041408 |
Key distribution method and system in secure broadcast communication |
| Mar-21-2000 |
A key distribution method and system are disclosed in which a sender and receivers share a common key information for performing a secure broadcast communication. By use of a center side apparatus, a center... |
| 6018583 |
Secure computer network |
| Jan-25-2000 |
A secure network comprises a plurality of terminals connected to a common file server. Each terminal holds in its memory an encrypted unique variable and unique first and second conjugates for each user... |
| 5987124 |
Method and apparatus for encrypting long blocks using a short-block encryption procedure |
| Nov-16-1999 |
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... |
| 5828753 |
Circuit and method for ensuring interconnect security within a multi-chip integrated circuit package |
| Oct-27-1998 |
Circuitry implemented within a multi-chip module comprising a first integrated circuit chip and a second integrated circuit chip coupled together through an interconnect. Both the first and second integrated... |
| 5790665 |
Anonymous information retrieval system (ARS) |
| Aug-4-1998 |
An information retrieval system in which data is retrieved anonymously by a user with the assistance of one or more trusted agents. |
| 5768381 |
Apparatus for key distribution in an encryption system |
| Jun-16-1998 |
An encryption/description apparatus enables encrypted communication between two stations each incorporating such an apparatus. The apparatus is arranged when acting as sender to create (at 71) a mutual... |
| 5742686 |
Device and method for dynamic encryption |
| Apr-21-1998 |
An apparatus and method for dynamic encryption of information including data, voice, and graphics, consisting of a random access memory containing encryption and decryption programs and the information... |
| 5729609 |
Method for producing a common key in two devices, in order to implement a common cryptographic procedure, and associated apparatus |
| Mar-17-1998 |
The invention relates to a method and an apparatus for producing a key that is common to two devices that belong to different sets and are intended to implement a common cryptographic procedure. Each device... |
| 5706347 |
Method and system for authenticating a computer network node |
| Jan-6-1998 |
A method and system for verifying the identity of a computer network node is provided. As part of the session initiation process between two partner nodes planning to exchange sensitive encrypted data,... |
| 5638444 |
Secure computer communication method and system |
| Jun-10-1997 |
Communication between a plurality of computers which are intercoupled or networked is provided in confidential form using password protection in combination with a special hardware token which is used... |
| 5602917 |
Method for secure session key generation |
| Feb-11-1997 |
A symmetric procedure avoids the problems with prior art systems using modifiers with master keys and generates a secure session key from a secret master key and an additional pair of randomly selected... |
| 5467398 |
Method of messaging in a communication system |
| Nov-14-1995 |
A communication system (100) employs a method of messaging between a subscriber unit (105) and an infrastructure communication center (101). A messaging key associated with a subscriber unit reference... |
| 5455862 |
Apparatus and method for encrypting communications without exchanging an encryption key |
| Oct-3-1995 |
An encryption/decryption unit (EDU) and method for determining a data encryption key used in encrypting and decrypting data transmitted over a non-secure communication link. Each EDU includes a central... |
| 5301247 |
Method for ensuring secure communications |
| Apr-5-1994 |
A method for initiating secure communications between two stations. In this method, a first portion of a session data encryption key (DEK1) is randomly generated by an EDU in one of the stations. The DEK1... |
| 5268962 |
Computer network with modified host-to-host encryption keys |
| Dec-7-1993 |
In a computer network, each pair of host computers that need to exchange data packets establish a single host-to-host encryption/decryption key. Then, whenever one host computer sends a data packet to... |
| 5253294 |
Secure transmission system |
| Oct-12-1993 |
In a secure digital transmission system that may utilize the Data Encryption Standard, the message signal is encrypted according to a predetermined algorithm and a key. The key is selected from a library... |
| 5237611 |
Encryption/decryption apparatus with non-accessible table of keys |
| Aug-17-1993 |
An encryption/decryption unit (EDU) that handles management of encryption keys used in the secure exchange of data over non-secure communication links. Each EDU includes a central processing unit (CPU)... |
| 5227613 |
Secure encrypted data communication system having physically secure IC cards and session key generation based on card identifying information |
| Jul-13-1993 |
A secure encrypted data communication system between IC cards inserted in respective terminals. In order to encrypt plain text sent from a first terminal to a second terminal, a first IC card (51) receives... |
| 5222136 |
Encrypted communication system |
| Jun-22-1993 |
A system for exchanging encrypted data between selected devices at stations comprising a network. The system includes an encrypted communications device (ECOM) (12) that selectively encrypts data from... |
| 5202922 |
Data communication system |
| Apr-13-1993 |
When a final session is performed between a host device and an IC card, common key data stored in the host device is encrypted by an updated session key and transmitted to the IC card in which the encrypted... |
| 5081678 |
Method for utilizing an encrypted key as a key identifier in a data packet in a computer network |
| Jan-14-1992 |
The nodes in a computer network utilize an encrypted key as a key identifier in a data packets transferred between nodes which eliminates the need for a receiving node to perform a memory look up operation... |
| 5007083 |
Secure computer |
| Apr-9-1991 |
A computer or communication system having physically secure vault means which include data source, receiver and decoder-encoder (cryptosystem). Data outside the vault means is coded and thereby protecting... |
| 5001750 |
Secret communication control apparatus |
| Mar-19-1991 |
A secret communication control apparatus used to effect secret communication with communication equipment, for example, facsimile equipment, which transmits picture information by use of public communication... |
| 4985919 |
Secure communication control system |
| Jan-15-1991 |
Encoder/decoders are associated with conventional local and far-end communications equipment such as facsimile machines. Information to be faxed is encoded at one end, transmitted to the other end, and... |
| 4866707 |
Secure messaging systems |
| Sep-12-1989 |
A secure messaging system with several terminals and many system (control) messages transmitted between the various terminals. These messages can deliberate, accidentally change sequence, or be deleted... |
| 4731840 |
Method for encryption and transmission of digital keying data |
| Mar-15-1988 |
A method for the encryption, transmission, and subsequent decryption of digital keying data. The method utilizes the Data Encryption Standard and is implemented by means of a pair of apparatus, each of... |
| 4578532 |
Method and apparatus for code transmission |
| Mar-25-1986 |
A transmission code required for decoding an encoded transmission of messages between a transmitting station and a receiving station is first transmitted from one station to the other. Previously identified... |
| 4503287 |
Two-tiered communication security employing asymmetric session keys |
| Mar-5-1985 |
Communications security between a host computer and another remote computer or terminal is ensured by a means of a two-tiered cryptographic communications security device and procedure. A master key is... |
| 4193131 |
Cryptographic verification of operational keys used in communication networks |
| Mar-11-1980 |
In a data communication network providing communication security for communication sessions between a first station and a second station where each station has cryptographic apparatus provided with an... |
