Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2005-08-30
2005-08-30
Barrón, Gilberto (Department: 2132)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C713S178000, C713S179000, C713S187000
Reexamination Certificate
active
06938157
ABSTRACT:
A system can process a digital representation (DF) of a document with a one-way cryptographic hash function (CHF) to yield a digital fingerprint (DFP) value that is associated with the DF. A document identification number (DID) is created, uniquely associated with the DFP, and with DID and DFP are associated optional credential information (C). A registration certificate DFC that represents an optional electronic signature associated with the document and that includes the DID and DFP is promulgated and archived at a plurality of storage locations. The system can authenticate whether a putative document is the original document by generating a digital fingerprint value for the putative document and comparing it to DFP retrieved from various of the storage locations. Authentication can confirm that the electronic signature is unaltered.
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Barrón Gilberto
Dinh Minh
Dorsey & Whitney LLP
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