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 us affix a partial signature among a plurality of authorizing agents.
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申请公布号 |
US8364967(B2) |
申请公布日期 |
2013.01.29 |
申请号 |
US20090382721 |
申请日期 |
2009.03.23 |
申请人 |
CQRCERT, LLC;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 |
H04L9/00;G06F7/72;G06Q20/00;H04L9/08;H04L9/32 |
主分类号 |
H04L9/00 |
代理机构 |
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地址 |
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