摘要： 目前，所有的ElGamal型广播多重数字签名方案都存在一个问题：签名时需要签名者之间或签名者与签名收集者之间交换多次数据以获取同一签名参数，从而导致系统的通信量增大，且易受攻击。该文给出了一种新的基于离散对数问题的广播多重数字签名方案。该方案不需要签名者在签名时多次交换数据以获取同一参数，因此具有更高的实用性和安全性。

关键词: 数字签名, 多重签名, 广播, ElGamal

Abstract: All of the existing ElGamal type broadcasting digital multisignature schemes have a problem: Data should be exchanged many times among signers to get the same signature parameter which would lead to high communication and insecurity. A new sequential multisignature scheme based on discrete logarithm problem without the mentioned problem is proposed. The new scheme is applicable and secure.

Key words: Digital signature, Multisignature, Broadcasting, ElGamal

中图分类号: 

• TN918.2