一种安全的(t,n)共享签名方案

A secure( t,n )shared signature scheme

基于离散对数问题 ,本文给出了一种安全的 (t,n)共享签名方案。该方案是数字签名方案和 (t,n)门陷方案的集成 ,并保留了他们的优点。在该方案中 ,签名者利用其个人密钥可以生成信息签名的密文并送给特定的验证组 ,采用 (t,n)门陷方案的该验证组 n位中的 t位能共享对信息进行恢复的权力。该方案与 Harn的 (t,n)方案及其改进方案相比 ,所要求的通信代价小 ,数据传输更安全。

Based on discrete logarithms problem,this paper proposes a secure ( t,n ) shared signature scheme. The scheme integrates signature scheme and the ( t,n ) threshold scheme,and preserves the merits inherent in them.In the scheme,the signer may generate a ciphertext of signsture for a message by using the own personal key,and transmit the ciphertext to a specified group of verifiers which adoptes ( t,n ) threshold scheme.Any t out of n verifiers in the group can share the authoring for message recovery.Compared with Harn's ( t,n ) scheme and its further modification,the proposed scheme requires smaller communication cost,and achieves more secrecy of data transmission.