标准摘要
[中文适用范围]： ISO/IEC 9796 的这一部分指定了六种提供消息恢复的数字签名方案。 这些方案的安全性基于离散对数问题的难度，该问题是在有限域或有限域上的椭圆曲线上定义的。 ISO/IEC 9796 的这一部分还在哈希令牌中定义了一个可选的控制字段，它可以为签名提供额外的安全性。 ISO/IEC 9796 的这一部分指定了随机机制。 ISO/IEC 9796 本部分中指定的机制提供全部或部分消息恢复。 注：对于带有附录的基于离散对数的数字签名方案，请参见 ISO/IEC 14888-3。 [外文原描述]： A digital signature in electronic exchange of information provides the same kind of facilities that are expected from a handwritten signature in paper-based mail. Hence it is applicable to providing entity authentication, data origin authentication, non-repudiation, and integrity of data. ISO/IEC 9796-3:2006 specifies digital signature mechanisms giving partial or total message recovery aiming at reducing storage and transmission overhead. ISO/IEC 9796-3:2006 specifies mechanisms based on the discrete logarithm problem of a finite field or an elliptic curve over a finite field. ISO/IEC 9796-3:2006 defines types of redundancy: natural redundancy, added redundancy, or both. ISO/IEC 9796-3:2006 gives the general model for digital signatures giving partial or total message recovery aiming at reducing storage and transmission overhead. ISO/IEC 9796-3:2006 specifies six digital signature schemes giving data recovery: NR, ECNR, ECMR, ECAO, ECPV, and ECKNR. NR is defined on a prime field; ECNR, ECMR, ECAO, ECPV, and ECKNR are defined on an elliptic curve over a finite field.
英文名称Information technology - Security techniques - Digital signature schemes giving message recovery - Part 3: Discrete logarithm based mechanisms