摘要： 验证者要知道一个证实数字签名的有效性，必须得到一个称为证实者的第3 方的帮助与合作。签名者的安全性和证实签名的“不可见性”是一个证实数字签名方案必须具备的两个重要特性。考虑到RSA 是应用最广泛的公钥密码体制之一，该文提出了一种完全基于RSA 的证实数字签名方案，分析表明，该方案是一种安全高效的证实数字签名实现方案。

关键词: 证实数字签名；不可否认签名；RSA；数字签名

Abstract: Without the help and cooperation of a designated confirmer, a verifier can not determine the validity of a confirmer signature. The subscriber’s security and the confirmer signature invisibility are characteristic to a confirmer signature scheme. Considering RSA is one of the most widely used cryptosystems, this paper proposes a confirmer signature scheme based on RSA for the first time. The scheme shows that the new scheme is an implementation of secure and efficient confirmer signature.

Key words: Confirmer signature; Undeniable signature; RSA; Digital signature