Multi-step digital signature method and system
OwnerFrank W. Sudia, Peter C. Freund +1inventors
InventorsFrank W. Sudia, Peter C. Freund, Stuart T.F. Huang
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OwnerFrank W. Sudia, Peter C. Freund +1inventors
InventorsFrank W. Sudia, Peter C. Freund, Stuart T.F. Huang
Estimating the term…
A multi-step signing system and method uses multiple signing devices to affix a single signature which can be verified using a single public verification key. Each signing device possesses a share of the signature key and affixes a partial signature in response to authorization from a plurality of authorizing agents. In a serial embodiment, after a first partial signature has been affixed, a second signing device exponentiates the first partial signature. In a parallel embodiment, each signing device affixes a partial signature, and the plurality of partial signatures are multiplied together to form the final signature. Security of the system is enhanced by distributing capability to affix signatures among a plurality of signing devices and by distributing authority to affix a partial signature among a plurality of authorizing agents.
A digital signing method comprising steps of:
A system for affixing digital signatures to electronic documents comprising:
A system of interlocked rings of signing devices for affixing digital signatures to electronic documents comprising:
Dependencies are inferred from the claim text.