| 5848159 |
Public key cryptographic apparatus and method |
| Dec-8-1998 |
A method and apparatus are disclosed for improving public key encryption and decryption schemes that employ a composite number formed from three or more distinct primes. The encryption or decryption tasks... |
| 5841874 |
Ternary CAM memory architecture and methodology |
| Nov-24-1998 |
The present invention encompasses a method of storing ternary data that includes the steps of (1) initializing a conversion register by storing binary-to-ternary mask data in a conversion register; (2)... |
| 5841865 |
Enhanced cryptographic system and method with key escrow feature |
| Nov-24-1998 |
The invention provides a cryptographic system and method with a key escrow feature that uses a method for verifiably splitting users' private keys into components and for sending those components to trusted... |
| 5835597 |
Software-efficient pseudorandom function and the use thereof for decryption |
| Nov-10-1998 |
A software-efficient pseudorandom function maps an index and an encryption key to a pseudorandom bit string useful for constructing a stream cipher. The method begins by preprocessing the encryption key... |
| 5835596 |
International cryptography framework |
| Nov-10-1998 |
A cryptographic framework consists of four basic service elements that include a national flag card, a cryptographic unit, a host system, and a network security server. Three of the four service elements... |
| 5822430 |
System for encoding encryption/decryption information into IFF challenges |
| Oct-13-1998 |
An IFF system produces a challenge in which some or all of the anti-interference pulses that are inserted between adjacent bits of an encrypted message are replaced with "information pulses" that convey... |
| 5812666 |
Cryptographic key management and validation system |
| Sep-22-1998 |
A Key Management System for generating, distributing and managing cryptographic keys used by an information transaction system that employs cryptographic means to produce evidence of information integrity.... |
| 5809148 |
Decryption of retransmitted data in an encrypted communication system |
| Sep-15-1998 |
The method generally includes the steps of receiving (201) a message (100) comprising a message indicator (101) and a plurality of encrypted blocks (103 through 111). When at least one block of the plurality... |
| 5802175 |
Computer file backup encryption system and method |
| Sep-1-1998 |
A system and method for generating, storing and retrieving cryptographic keys to be utilized in a processor-based system. In one embodiment, a Touch Memory ("TM") containing unique information is used... |
| 5799090 |
pad encryption method and software |
| Aug-25-1998 |
A pad encryption software architecture includes space on a floppy for storing the pad to be used with the encryption software. The pad is XOR generated with random numbers subject to redetermined offsets.... |
| 5799080 |
Semiconductor chip having identification/encryption code |
| Aug-25-1998 |
A code mechanism is provided in an integrated circuit for identifying the integrated circuit such as by serial number or for use in enabling the circuit and equipment housing the circuit. Fuses, antifuses,... |
| 5796839 |
Encryption method, encryption apparatus, recording method, decoding method, decoding apparatus and recording medium |
| Aug-18-1998 |
There are provided an encryption method, an encryption apparatus, a recording method, a decoding method, a decoding apparatus and a recording medium in which encryption keys can be managed with ease by... |
| 5796830 |
Interoperable cryptographic key recovery system |
| Aug-18-1998 |
A cryptographic key recovery system that is interoperable with existing systems for establishing keys between communicating parties. The sender uses a reversible key inversion function to generate key... |
| 5796824 |
Storage medium for preventing an irregular use by a third party |
| Aug-18-1998 |
A storage medium stores encrypted electronic data, a medium personal number which is unique for each storage medium and encrypted permission information. At least the medium personal number is written... |
| 5790677 |
System and method for secure electronic commerce transactions |
| Aug-4-1998 |
An electronic commerce system facilitates secure electronic commerce transactions among multiple participants. Each electronic commerce transaction involves at least one commerce document defining the... |
| 5790668 |
Method and apparatus for securely handling data in a database of biometrics and associated data |
| Aug-4-1998 |
A person wanting an entitlement, such as welfare, typically inputs his fingerprint to a database. On a match with a fingerprint already in the database, a profile of the person with the matching fingerprint... |
| 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... |
| 5787173 |
Cryptographic key management method and apparatus |
| Jul-28-1998 |
A system for the secure communication of a message from a transmitting user to a receiving user using a split key scheme. Each user generates a key component using a cryptographic engine. The key component... |
| 5787170 |
Database system with local information remotely supported with dynamic information |
| Jul-28-1998 |
A database system comprises an individual station with berth means for receiving an optically readable information carrier with local information. The system reads the carrier and furthermore receives... |
| 5784464 |
System for and method of authenticating a client |
| Jul-21-1998 |
A key management unit of a service provider system generates an individual key corresponding to a portable module connected to a service client making an access request and informs an authenticating unit... |
| 5784462 |
Digital signal receiver capable of receiving data encrypted and transmitted in online processing |
| Jul-21-1998 |
In a decoding processing circuit of a digital signal receiver, a first comparison circuit detects that a prefix of packet data is inputted in a shift register on the basis of a count value of a counter... |
| 5774544 |
Method an apparatus for encrypting and decrypting microprocessor serial numbers |
| Jun-30-1998 |
A method and apparatus for encrypting and decrypting a microprocessor serial number. First and second encryption keys and a serial number are provided in microprocessor machine specific registers. The... |
| 5771291 |
User identification and authentication system using ultra long identification keys and ultra large databases of identification keys for secure remote terminal access to a host computer |
| Jun-23-1998 |
A method of providing user identification and authentication using ultra long identification key codes and/or ultra large databases of identification key codes in a manner providing secure access to a... |
| 5768389 |
Method and system for generation and management of secret key of public key cryptosystem |
| Jun-16-1998 |
A method and a system for generating and managing a secret key of a public key cryptosystem, in which the secret key is generated inside a tamper resistant device, and stored into a storage region in a... |
| 5757911 |
Encryption communication process and terminal for encryption communication |
| May-26-1998 |
An encryption communication terminal includes an encryption key table 9a for registering secret encryption keys and an encryption box 9b for storing received encrypted data. When encrypted data is received,... |
| 5757907 |
Method and apparatus for enabling trial period use of software products: method and apparatus for generating a machine-dependent identification |
| May-26-1998 |
A method and apparatus is provided for distributing a software object from a source to a user. A software object is encrypted with an encryption operation utilizing a long-lived encryption key. It is directed... |
| 5751814 |
File encryption method |
| May-12-1998 |
A file encryption method is provided which includes the steps of encrypting the text of the message to be sent, concatenating the encrypted text together with a password to the end of a decryption application... |
| 5745576 |
Method and apparatus for initialization of cryptographic terminal |
| Apr-28-1998 |
The present invention provides a method and apparatus for initializing cryptographic terminals in a cryptographic system. The invention provides a base key that is common to all controllers produced by... |
| 5745575 |
Identification-friend-or-foe (IFF) system using variable codes |
| Apr-28-1998 |
An Identification-Friend-or-Foe System Using Variable Codes (IFF System) lizes variable codes and pre-selected encryption/decryption technology to querry potential targets as to their battlefield affiliation... |
| 5742682 |
Method of manufacturing secure boxes in a key management system |
| Apr-21-1998 |
A method of manufacturing a secure box in a Key Management System that includes a plurality of functionally distinct secure boxes initializes a first manufacturing box if one does not exist. The method... |
| 5727061 |
Personal access management systems |
| Mar-10-1998 |
A multi-component system for linking a user to a product or service provider includes a user processing device, a storage device, and a provider device. The storage device stores provider-specific application... |
| 5724426 |
Apparatus and method for controlling access to and interconnection of computer system resources |
| Mar-3-1998 |
A compact, physically secure, high-performance access controller (16, 18) is electrically connected to each access-managed resource (12, 14) or group of resources (10) in a computer system. Whenever access... |
| 5717756 |
System and method for providing masquerade protection in a computer network using hardware and timestamp-specific single use keys |
| Feb-10-1998 |
An authentication session key is generated on a trusted machine based upon an identifier of its CPU, hardware configuration, and a timestamp. The trusting machine retrieves this same information about... |
| 5717755 |
Distributed cryptographic object method |
| Feb-10-1998 |
A system for increasing the security of a computer system, while giving an individual user a large amount of flexibility and power. To give users the most power and flexibility, a standard object that... |
| 5696825 |
Personal access management system |
| Dec-9-1997 |
A multi-component system for linking a user to a product or service provider includes a user processing device, a storage device, and a provider device. The storage device stores provider-specific application... |
| 5696827 |
Secure cryptographic methods for electronic transfer of information |
| Dec-9-1997 |
Cryptographic methods and apparatus are disclosed relating to practical cryptographic systems for electronic transfer of information. Specifically, inventive techniques are described to allow the use of... |
| 5694472 |
Personal access management system |
| Dec-2-1997 |
A multi-component system for linking a user to a product or service provider includes a user processing device, a storage device, and a provider device. The storage device stores provider-specific application... |
| 5694471 |
Counterfeit-proof identification card |
| Dec-2-1997 |
A system and method for preventing counterfeiting of an identification or transaction card, and for verifying that the user of the card is an authorized user, involves the use of a unique, unalterable... |
| 5689564 |
Personal access management system |
| Nov-18-1997 |
A multi-component system for linking a user to a product or service provider includes a user processing device, a storage device, and a provider device. The storage device stores provider-specific application... |
| 5689565 |
Cryptography system and method for providing cryptographic services for a computer application |
| Nov-18-1997 |
A cryptography system architecture provides cryptographic functionality to support an application requiring encryption, decryption, signing, and verification of electronic messages. The cryptography system... |
| 5689560 |
Method and apparatus for enabling trial period use of software products: method and apparatus for allowing a try-and-buy user interaction |
| Nov-18-1997 |
A method and apparatus is provided for distributing software objects from a producer to a potential user. The software object is reversibly functionally limited, preferably through encryption, and loaded... |
| 5689561 |
Computer-based trading card system and method |
| Nov-18-1997 |
A collection system using a CD ROM computer system wherein the collection items (or more specifically their unlocking keys) are contained in various floppy disks. With the disks inserted into the computer... |
| 5687237 |
Encryption key management system for an integrated circuit |
| Nov-11-1997 |
A microcontroller is in bus communication with an improved integrated circuit for providing data to the integrated circuit and reading data from the integrated circuit. The integrated circuit selectively... |
| 5680456 |
Method of manufacturing generic meters in a key management system |
| Oct-21-1997 |
A method of manufacturing transaction evidencing devices, such as digital postage meters, includes the steps of generating a master key in a logical security domain of a Key Management System; installing... |
| 5680458 |
Root key compromise recovery |
| Oct-21-1997 |
A method of recovering from a compromise of a root key which is the private key of a first public key-private key pair, the method including the steps of electronically sending out an emergency message... |
| 5677956 |
Method and apparatus for data encryption/decryption using cellular automata transform |
| Oct-14-1997 |
A method and apparatus for encrypting and decrypting data using a transform which is a function of input data and a basis. After the input data is received, the basis is generated from key values specifying... |
| 5675652 |
Computer readable device implementing a software-efficient pseudorandom function encryption |
| Oct-7-1997 |
A software-efficient pseudorandom function maps an index and an encryption key to a pseudorandom bit string useful for constructing a stream cipher. The method begins by preprocessing the encryption key... |
| 5673034 |
Security system comprising three apparatuses sharing a time-varying code |
| Sep-30-1997 |
Complex, time varying codes (e.g., pseudo-random sequences) are used in an access regulating system that includes three types of synchronized apparatuses. The first apparatus is a central computer, or... |
| 5661803 |
Method of token verification in a key management system |
| Aug-26-1997 |
A method of token verification in a Key Management System provides a logical device identifier and a master key created in a logical security domain to a transaction evidencing device, such as a digital... |
| 5659618 |
Multi-size cryptographic key system |
| Aug-19-1997 |
A system is employed for providing two different levels of protection for cryptographic devices transmitting digital information. The system is independent of the cryptographic algorithm used and works... |
