发明名称 |
Multi-step digital signature method and system |
摘要 |
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.
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申请公布号 |
US5825880(A) |
申请公布日期 |
1998.10.20 |
申请号 |
US19970869253 |
申请日期 |
1997.06.04 |
申请人 |
SUDIA, FRANK W.;FREUND, PETER C.;HUANG, STUART T.F. |
发明人 |
SUDIA, FRANK W.;FREUND, PETER C.;HUANG, STUART T.F. |
分类号 |
G06F7/72;G06F21/00;G06Q20/00;H04L9/08;H04L9/32;(IPC1-7):H04L9/32 |
主分类号 |
G06F7/72 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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