Verification of electronic signatures

Details Verification of electronic signatures Verification of electronic signatures

2011-03-08

2011-03-08

Truong, Thanhnga B (Department: 2438)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S178000, C713S180000, C713S155000

Reexamination Certificate

active

07904725

ABSTRACT:
A system verifies an electronic signature. The electronic signature may be associated with timestamps, each including a time value. A timestamp verification module detects invalid certificates in a certificate chain of the electronic signature and records an earliest invalidity time value of the invalid certificates. The verification module also verifies the timestamps associated with the electronic signature and records the time value of the earliest valid timestamp. A declaration module declares the electronic signature as valid if the time value of the earliest valid timestamp is earlier than the earliest invalidity time value of the one or more invalid certificates. The electronic signature may alternatively or additionally be associated with countersignatures. A countersignature verification module verifies the countersignatures associated with the electronic signature, and the declaration module declares the electronic signature as valid if all of the countersignatures are determined to be valid.

REFERENCES:
patent: 4868877 (1989-09-01), Fischer
patent: 5659616 (1997-08-01), Sudia
patent: 6301658 (2001-10-01), Koehler
patent: 2002/0029337 (2002-03-01), Sudia et al.
patent: 2005/0210256 (2005-09-01), Meier et al.
patent: 2007/0186111 (2007-08-01), Durand
patent: 2007/0220259 (2007-09-01), Pavlicic
patent: 2001-0040248 (2001-05-01), None
International Search Report PCT/US2007/003701, Aug. 6, 2007, pp. 1-9.
“XML Advanced Electronic Signatures (XAdES)”, version 1.2.2, Apr. 2004.

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