Smart cards
US6058481A · kind A · utility
6Cited by
29References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 26, 1998 |
| Grant date | May 2, 2000 |
| Priority date | — |
| Expiry date | Mar 26, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/0637
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
A logic machine and a circuit for producing an authentication code for authenticating smart cards which include a cycle of steps wherein a bit word is read out of a secret memory with a plurality of bit words, and words read out during previous cycles are combined. The result of the combination is used as a generator word for generating the address of the word to be read out in the next cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.