Method and system for fair exchange of user information

Details Method and system for fair exchange of user information Method and system for fair exchange of user information

2003-06-30

2008-08-12

Barron, Jr., Gilberto (Department: 2136)

Cryptography

Particular algorithmic function encoding

Public key

C713S002000, C380S262000, C705S064000

Reexamination Certificate

active

07412055

ABSTRACT:
A method and system for a fair exchange of user information over a network is disclosed. The method comprises the steps of: transmitting over the network the user information encoded in association with a hidden value selected as one of a plurality of values distributed in a sequence wherein a difference between adjacent ones of said values increases and decreases symmetrically about one of the values of a known order; transmitting over said network a first set of the values and a last value in the sequence, wherein the values in said first set have increasing differences between adjacent ones of the values; and transmitting, individually, and in response to receipt of the other user's values, the remaining values in said sequence.

REFERENCES:
patent: 4944009 (1990-07-01), Micali et al.
patent: 2002/0049601 (2002-04-01), Asokan et al.
patent: 2003/0018932 (2003-01-01), Blum et al.
Williams Stallings, Cryptography and Network Security Principles and Practive, 1999, Prentice-Hall, Inc., Second Edition, pp. 149-156.
Boneh and Naor, Timed Commitments (Extended Abstract), Advances in Cryptology, Crypto '00 vol. 1880 of Lecture Notes in Computer Science, pp. 236-254, Springer-Verlag 2000.

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