Crytographic system and process and its application
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Mar 19, 1991
Grant Date -
N/A
app pub date -
Mar 7, 1988
filing date -
Mar 6, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The subject of the present invention is a cryptographic system, having two inverse permutations, which can be implemented in a (micro) computer whose data processing resources are relatively limited. The two inverse permutations are processed with one and the same table, and the data zones, before and after permutation, occupy only one and the same memory zone. Applied to the DES cryptographic system, this can in particular be implemented in the memory card for the purpose of ensuring the security of transmissions between the card and a communication system; in particular the card reader of this system.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully