Cryptographic communication method and system
US5144665A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1991 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Feb 21, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/302
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
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 network by using a data key designated by the given terminal or the host, wherein the host computer includes a cryptographic processing unit which includes a processing part for performing a public key cryptographic processing by using a pair of a public key and a private key and a common key cryptographic processing by using a common key, and an internal memory for storing master common key and master private key, a storage for recording as user private key information those data that result from the public key cryptographic processing performed by using a master public key on a plurality of user private keys which are in paired relation to user public keys held in the user terminals, respectively, and control means for performing input/output control between the storage and the cryptographic processing means.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.