Computer accessing system
US4310720A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 31, 1978 |
| Grant date | Jan 12, 1982 |
| Priority date | — |
| Expiry date | Mar 31, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S379/903
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A communications link between a computer and a remote user is effected by a portable access unit which generates a nonrecurring access code which is a function of a password and a pseudorandomly generated number. The access code is transmitted and compared with an access code generated by a computer access controller. In addition to the access code, the pseudorandomly generated number provides an encryption key which is not transmitted but corresponds to a mating encryption key generated at the controller. The mating encryption keys are utilized to set up data transmission enciphering/deciphering networks successive links are established by incremented pseudorandomly generated access codes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.