Abstract: A forward-secure proxy multi-signature scheme is proposed on the basis of forward secure proxy signatures.Under the proposition of security of the Hash function and the strong RSA assumption，and prove that the scheme satisfies the security of general proxy multi-signature scheme and forward-security.It could not forge proxy multi-signature in the past in case the signer’s secret key that is exposed.Furthermore the primitive signers may control a proxy deadline and the proxy information need not be delivered secretly.

Key words: proxy multi-signature, forward-security, strong RSA assumption

摘要： 基于前向安全代理签名的思想，提出了一个前向安全的代理多重签名方案，并证明在强RSA假定问题下，该方案不仅满足了一般代理多重签名方案的安全性，而且签名具有前向安全性，即使代理签名人的代理签名密钥被泄露，以前所产生的代理签名依然有效。另外，原始签名人可以对代理期限进行控制，并且代理信息不需要秘密传送。

关键词: 代理多重签名, 前向安全性, 强RSA假定