| 5651067 |
Storage and selective information transmission system for personal data |
| Jul-22-1997 |
Storage and selective information transmission system of personal data comprising at least one optical memory card on which a defined memory field for storing a multiplicity of key terms is provided, a... |
| 5646993 |
Information reproducing method and apparatus having protect function and recording medium used in apparatus |
| Jul-8-1997 |
In reproduction of information, a decoding program is reproduced from an information recording medium on which information is enciphered and recorded, and an encryption key and the decoding program, which... |
| 5644638 |
Process for protecting components of smart or chip cards from fraudulent use |
| Jul-1-1997 |
Process for protecting components of smart cards from fraudulent use, wherein the component is locked as long as an unlock order formed by a secret key has not been applied thereto, characterized in that... |
| 5638442 |
Method for remotely inspecting a postage meter |
| Jun-10-1997 |
The postage meter terminal has the ability to telecommunicate with a remote central computer for the principal purpose of remotely resetting the funding registers of the postage meter terminal. During... |
| 5636277 |
System for licensing to use software products |
| Jun-3-1997 |
A system for licensing to use software products which are encrypted and packed in a single storage medium, whereby the encrypted software products can be sold on a piece-by-piece basis and it is possible... |
| 5621795 |
System and method for fault tolerant key management |
| Apr-15-1997 |
A system and method of fault tolerant key management of cryptographic keys includes a key distribution computer and primary and secondary key management computers coupled to the key distribution computer,... |
| 5619574 |
Personal access management system |
| Apr-8-1997 |
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... |
| 5619576 |
Variable-key cryptography system |
| Apr-8-1997 |
Binary data is encrypted or decrypted using a final key. The final key is formed by manipulating one or more user keys, a base key and a block of data, and combining the manipulated keys and data using... |
| 5619572 |
Method and apparatus for providing secure communications for a requested call |
| Apr-8-1997 |
A secure communication system (100) that is capable of over-the-air-rekeying (OTAR) employs a key management controller (108) to provide secure communications for a requested call. The key management controller... |
| 5610980 |
Method and apparatus for re-initializing a processing device and a storage device |
| Mar-11-1997 |
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... |
| 5604800 |
Personal access management system |
| Feb-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... |
| 5604801 |
Public key data communications system under control of a portable security device |
| Feb-18-1997 |
A data communications system is described in which messages are processed using public key cryptography with a private key unique to one or more users (150) under the control of a portable security device... |
| 5602915 |
Process for the control of secret keys between two smart cards |
| Feb-11-1997 |
A process for controlling communication between a first and a second smart card using key-based cryptography is provided. In the disclosed process, a first identity code is stored in the first smart card... |
| 5596639 |
CD-PROM |
| Jan-21-1997 |
Data on a CD-PROM disk is selectively accessed in a secure manner by selectively encoding binary digital passwords and decryption keys onto the same disk in a separate area. Passwords and decryption keys... |
| 5594797 |
Variable security level encryption |
| Jan-14-1997 |
A method and apparatus for digital cellular telephone encryption includes a switch when a choice between compatibility security and a higher security is required. Plaintext is converted into ciphertext... |
| 5584022 |
Enciphered file sharing method |
| Dec-10-1996 |
An enciphered file sharing method is adapted to an area distributed type data processing system in which a plurality of data processing units are coupled via a network and a plurality of users share files... |
| 5563947 |
CD-PROM |
| Oct-8-1996 |
Encrypted data on a CD-PROM disk is managed by selectively encoding binary digital decryption keys onto the same disk in a separate data area. A decryption key or keys may be programmed onto the disk after... |
| 5555304 |
Storage medium for preventing an illegal use by a third party |
| Sep-10-1996 |
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... |
| 5548646 |
System for signatureless transmission and reception of data packets between computer networks |
| Aug-20-1996 |
A system for automatically encrypting and decrypting data packet sent from a source host to a destination host across a public internetwork. A tunnelling bridge is positioned at each network, and intercepts... |
| 5541995 |
Method and apparatus for decoding non-sequential data packets |
| Jul-30-1996 |
Data packets which have been sequentially encoded and transmitted, and are received out-of-sequence, are decoded, such that the proper sequence is restored. A receiving decoder is synchronized with a transmitting... |
| 5537475 |
Efficient digital signature algorithm and use thereof technical field |
| Jul-16-1996 |
A digital signature scheme wherein the signature of a message M relative to a public key is computed by means of a secret key. The scheme begins by having the user select a number x independent of M. This... |
| 5533126 |
Key protection device for smart cards |
| Jul-2-1996 |
This invention concerns a key protection device for smart cards and is characterized by the fact that: each input user key is coded using a random key and stored; protection data that corresponds to each... |
| 5530749 |
Methods and apparatus for secure hardware configuration |
| Jun-25-1996 |
Methods and apparatus are provided for electronically configuring hardware features and options. A computer chip encoding method is provided in which a predetermined code or encryption sequence is uniquely... |
| 5513261 |
Key management scheme for use with electronic cards |
| Apr-30-1996 |
In an electronic card of the type for insertion into a host electronic device for providing to the host device security parameters pertaining to the rightful holder of the card, the security parameters... |
| 5502766 |
Data enclave and trusted path system |
| Mar-26-1996 |
A data communication system providing for the secure transfer and sharing of data via a local area network and/or a wide area network. The system includes a secure processing unit which communicates with... |
| 5499298 |
Controlled dissemination of digital information |
| Mar-12-1996 |
The present invention is a method and apparatus for controlling the dissemination of digital information. Digital information is structured logically to incorporate usage history and allowable access window... |
| 5495533 |
Personal key archive |
| Feb-27-1996 |
A computing system is described having an automated management system for managing keys to encrypt and decrypt stored data on the computing system. The computing system has an authentication server; a... |
| 5485577 |
Method and apparatus for incremental delivery of access rights |
| Jan-16-1996 |
Incremental delivery of authenticated access rights to an access control processor is provided. Subgroups of the access rights are communicated to the processor in a plurality of messages. The subgroups... |
| 5483596 |
Apparatus and method for controlling access to and interconnection of computer system resources |
| Jan-9-1996 |
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... |
| 5483595 |
Paging device including password accessed stored cryptographic keys |
| Jan-9-1996 |
A paging device includes a cryptographic function and a password accessed cryptographic key look-up table associating each stored key with a password. When an cryptographic message is collected by the... |
| 5481610 |
Digital radio transceiver with encrypted key storage |
| Jan-2-1996 |
A digital radio has standardized "key" storage for several different cryptosystems (DES, VGE, VGS, etc.). Cryptographic keys are stored in a table in non-volatile memory such as EEPROM. The "keys" are... |
| 5481613 |
Computer network cryptographic key distribution system |
| Jan-2-1996 |
Novel cryptographic key distribution techniques to be used in large computer networks are disclosed. The techniques require trusted key release agent systems in each security domain. The encryptor of a... |
| 5479514 |
Method and apparatus for encrypted communication in data networks |
| Dec-26-1995 |
A secure network data communication technique that allows the designation of selected network nodes to share encryption keys with other selected network nodes. A message originating node determines nodes... |
| 5479513 |
Fast and secure encryption-decryption method based on chaotic dynamics |
| Dec-26-1995 |
A method and system for the secure encryption of information. The method comprises the steps of dividing a message of length L into its character components; generating m chaotic iterates from m independent... |
| 5467396 |
Tamper-proof data storage |
| Nov-14-1995 |
In a data processing system, stored data that is essential to a given data processing operation, such encryptographic key generation, is tamper proof in that if such data is altered, processing of the... |
| 5465300 |
Secure communication setup method |
| Nov-7-1995 |
A call is connected between secure terminals (16) through a network (12). If a network address for the call is included on an approved list (46), a secure call setup procedure (54) is performed automatically.... |
| 5452358 |
Method and apparatus for improving the security of an electronic codebook encryption scheme utilizing a data dependent encryption function |
| Sep-19-1995 |
An apparatus and method for improving the security of an electronic codebook encryption scheme comprises a transmitter unit for encoding or encrypting data and a separate authorized receiver for decoding... |
| 5452355 |
Tamper protection cell |
| Sep-19-1995 |
The present invention is directed to providing a level of security on a chip which makes accessing stored data so burdensome that it is outweighed by the cost of merely purchasing the chip through conventional,... |
| 5446796 |
Method and apparatus for settlement of accounts by IC cards |
| Aug-29-1995 |
An IC card has a card information memory area wherein there are written a master public key nA, card secret keys pU and qU, a card public key nU, a card identification number IDU, and a first master digital... |
| 5442703 |
Method for identifying corrupt encryption keys within a secure communication system |
| Aug-15-1995 |
A resource allocator (108) receives, from a first communication unit, a request to establish secure communications with at least a second communication unit. A key identifier is retrieved by the resource... |
| 5425103 |
Variable-key cryptography system |
| Jun-13-1995 |
Binary data is encrypted or decrypted using a final key. The final key is formed by manipulating one or more user keys and a base key, and combining the manipulated keys using an exclusive-OR operation.... |
| 5416841 |
Cryptography system |
| May-16-1995 |
A cryptographic system includes a conventional DES facility for encrypting data using a key of N (=56) bits. The user however need only supply a first key of n bits, which is passed to a key management... |
| 5416840 |
Software catalog encoding method and system |
| May-16-1995 |
A method and system for protecting computer program distribution within a broadcast medium involves encrypting at least a portion of the computer program S.sub.i using an encryption scheme keyed to both... |
| 5412723 |
Mechanism for keeping a key secret from mobile eavesdroppers |
| May-2-1995 |
A method is provided which allows a set of servers to maintain a set of keys, shared with a client, in the presence of mobile eavesdroppers that occasionally break into servers and learn the entire contents... |
| 5412722 |
Encryption key management |
| May-2-1995 |
A key management system permits a high degree of autonomous rekeying activity by communication units (105) in a secure communication system (100). Responsive to time reference information transmitted by... |
| 5404403 |
Key management in encryption systems |
| Apr-4-1995 |
A key management system for encryption keys removes the effect of secure communications loss during a rekey period in a secure communications system. Use of key indexes to partition encryption keys into... |
| 5392351 |
Electronic data protection system |
| Feb-21-1995 |
An electronic data protection system for protecting electronic data from illegal copying by a third party, includes: a storage medium for storing an encrypted electronic data, a medium number and encrypted... |
| 5381478 |
Cipher communication system for transaction data |
| Jan-10-1995 |
A cipher communication system for communicating transaction data between a host computer and a portable electronic device, wherein the host computer includes a first memory for storing a master key data,... |
| 5381479 |
Method for over the air rekeying of multiple communication groups |
| Jan-10-1995 |
In a secure communication system 100, communication units in different communication groups may be simultaneously rekeyed over the air by having a managing key unit 101 generate a key packet 121. This... |
| 5379344 |
Smart card validation device and method |
| Jan-3-1995 |
A validation device (2) for a smart card (1) of the kind having unprotected data storage memory (4) and protected data storage memory (5) selectively accessible by means of a user access code. The device... |
