Portable data carrier provide with access protection by...

Details Portable data carrier provide with access protection by... Portable data carrier provide with access protection by...

2000-12-20

2008-10-21

Revak, Christopher A (Department: 2131)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

C713S194000, C380S044000

Reexamination Certificate

active

07441125

ABSTRACT:
The invention relates to a data storage medium having a semiconductor chip which has at least one memory in which an operating program is stored which contains a number of commands, with each command producing signals which can be detected from outside the semiconductor chip. According to the invention, the data storage medium is designed such that data which is used more than once for a calculation process is scrambled using different functions.

REFERENCES:
patent: 5222139 (1993-06-01), Takaragi et al.
patent: 5991415 (1999-11-01), Shamir
patent: 6064740 (2000-05-01), Curiger et al.
patent: 6615354 (2003-09-01), Ohki et al.
patent: 6870929 (2005-03-01), Greene
patent: 6907126 (2005-06-01), Inada
patent: 2001/0053220 (2001-12-01), Kocher et al.
patent: 2002/0010679 (2002-01-01), Felsher
patent: 0 682 327 (1995-11-01), None

Affiliated with

Also associated with

Rating

Portable data carrier provide with access protection by... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Portable data carrier provide with access protection by..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Portable data carrier provide with access protection by... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4008446