发明名称 |
Hybrid signature scheme |
摘要 |
A signature scheme is provided in which a message is divided in to a first portion which is hidden and is recovered during verification, and a second portion which is visible and is required as input to the verification algorithm. A first signature component is generated by encrypting the first portion alone. An intermediate component is formed by combining the first component and the visible portion and cryptographically hashing them. A second signature component is then formed using the intermediate component and the signature comprises the first and second components with the visible portion. A verification of the signature combines a first component derived only from the hidden portion of the message with the visible portion and produces a hash of the combination. |
申请公布号 |
US8793500(B2) |
申请公布日期 |
2014.07.29 |
申请号 |
US201213421589 |
申请日期 |
2012.03.15 |
申请人 |
Certicom Corp.;Pitney Bowes Inc. |
发明人 |
Vanstone Scott Alexander;Gallant Robert;Lambert Robert J.;Pintsov Leon A.;Ryan, Jr. Frederick W.;Singer Ari |
分类号 |
H04L9/28 |
主分类号 |
H04L9/28 |
代理机构 |
Novak Druce Connolly Bove + Quigg LLP |
代理人 |
Novak Druce Connolly Bove + Quigg LLP |
主权项 |
1. A method at a correspondent of digitally signing a message comprising a recoverable portion and a visible portion, said method comprising a processor of the correspondent:
encoding said recoverable portion using an encryption function to obtain a first signature component; computing an intermediate signature component as a function of said first signature component and said visible portion; computing a second signature component by applying a signing scheme to said intermediate as a function of said first signature component, said visible portion and a private key associated with said correspondent; and providing a signature comprising said first signature component, said second signature component and said visible portion as signature components. |
地址 |
Mississauga CA |