发明名称 MASKED DIGITAL SIGNATURES
摘要 The present invention relates to digital signature operations using public k ey schemes in a secure communications system and in particular for use with processors having limit ed computing power such as "smart cards". This invention describes a method for creating and authenticating a digital signature comprising the steps of selecting a first session parameter k and generating a first short term public key derived from the session parameter k, computing a first signature component r derived from a first mathematical function using the short term public key, selecting a second session parameter t and computing a second signature component s derived from a second mathematical function using the second session parameter t and without using an inverse operation, computing a third signature component using the first and second session parameters and sending the signature components (r, s, c) as a masked digita l signature to a receiver computer system. In the receiver computer system computing a recovered second signature component s' by combining a third signature component with the second signature component to derive signature components ( ~, r) as an unmasked digital signature. Verifying these signature components as in a usual ElGamal or ECDSA type signature verification.
申请公布号 CA2308170(C) 申请公布日期 2009.12.22
申请号 CA19982308170 申请日期 1998.11.10
申请人 CERTICOM CORP. 发明人 JOHNSON, DONALD B.;VANSTONE, SCOTT A.;QU, MINGHUA
分类号 G09C1/00;H04L9/32;G07F7/10 主分类号 G09C1/00
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