System and method for certifying content of hard-copy documents

Cryptography – Electric signal modification – Having production of printed copy

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

H04L 900

Patent

active

059265515

ABSTRACT:
A system and method are provided for facilitating proof that a specific item, such as a document, has been sent via a communication medium, such as the mail service of the United States Postal Service, at a specific time. A bit map image is produced, such as by scanning a hard copy document. Preferably the bit map is compressed into a data string and hashed. The hash file is signed by a certifying authority, such as the USPS, using an existentially unforgeable signature scheme. The original document, a code representation of the string, and a code representation of the signature are sent via the communication medium. As a result, the combination of materials sent provides proof of the authenticity of the content of the document.

REFERENCES:
patent: 4200770 (1980-04-01), Hellman et al.
patent: 4218582 (1980-08-01), Hellman et al.
patent: 4405829 (1983-09-01), Rivest et al.
patent: 4424414 (1984-01-01), Hellman et al.
patent: 4868877 (1989-09-01), Fischer
patent: 4995082 (1991-02-01), Schnorr
patent: 5001752 (1991-03-01), Fischer
patent: 5005200 (1991-04-01), Fischer
patent: 5136647 (1992-08-01), Haber
patent: 5157726 (1992-10-01), Merkle
patent: 5222138 (1993-06-01), Balabon et al.
patent: 5231668 (1993-07-01), Kravitz
patent: 5444779 (1995-08-01), Daniele
patent: 5465299 (1995-11-01), Matsumoto
patent: 5553145 (1996-09-01), Micali
C. Dwork, M. Naor, An Efficient Existentially Unforgeable Signature Scheme and its Applications, Advances in Cryptology-CRYPTO '94, 14th Annual International Cryptology Conference, Santa Barbara, California, pp. 234-246, Aug. 1994.
S. Goldwasser et al., "A Digital Signature Scheme Secure Against Adaptive Chosen-message Attacks", SIAM Journal of Computing, vol. 17, No. 2, Apr. 1988, pp. 281-308.
W. Diffie et al., "New Directions in Cryptography", IEEE Transactions on Information Theory, vol. IT-22, No. 6, Nov. 1976, pp. 644-654.

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

System and method for certifying content of hard-copy documents does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System and method for certifying content of hard-copy documents, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for certifying content of hard-copy documents will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-1329456

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