Administration and utilization of secret fresh random numbers in

Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

713168, 713200, 713170, 713171, 713178, 380268, 380259, 380278, 380281, 380283, 380 46, H04L 900

Patent

active

061516767

ABSTRACT:
In a public key cryptosystem employing the El-Gamal algorithm, secret fresh random numbers are generated at a server and private keys of users, as encrypted with a symmetric algorithm by using individual user identifying keys determined by hashing the users' respective passphrases or biometric information (fingerprint, voiceprint, retina scan, or face scan) are maintained in a store accessible to the server, and the fresh random numbers and encrypted private keys are transmitted to the user equipment when needed via a network which is not secure. In order to prevent an attacker from discovering the random numbers or employing formerly used random numbers in a block replay attack, an interchange in the nature of a challenge response protocol is employed which passes at least one secret fresh random number from the server to the user equipment while also authenticating the user to the server. In this interchange, a first random number to be distributed to the user for use in signing a document and a second random number which is to be used by the user in forming a signature of a hashing together of the first and second random numbers as part of the challenge response protocol, are supplied to the user equipment in encrypted form together with a freshness value, and a signature by the server of a hashing together of the first and second random numbers and the freshness value.

REFERENCES:
patent: 4956863 (1990-09-01), Goss
patent: 5136646 (1992-08-01), Haber et al.
patent: 5148479 (1992-09-01), Bird et al.
patent: 5406628 (1995-04-01), Beller et al.
patent: 5434918 (1995-07-01), Kung et al.
patent: 5475763 (1995-12-01), Kaufman et al.
patent: 5481720 (1996-01-01), Loucks et al.
patent: 5590199 (1996-12-01), Krajewski, Jr. et al.
patent: 5608801 (1997-03-01), Aiello et al.
patent: 5638448 (1997-06-01), Nguyen
patent: 5719940 (1998-02-01), Ahn et al.
patent: 5778065 (1998-07-01), Hauser et al.
"Applied Cryptography", 2nd Ed., Bruce Schneier: Aut., John Wiley & Sons, Oct. 18, 1995 pp. 32-56.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Administration and utilization of secret fresh random numbers in does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Administration and utilization of secret fresh random numbers in, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Administration and utilization of secret fresh random numbers in will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1267229

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.