本文通過分析密鑰絕緣體制和多級代理簽名體制性質，發現他們之間存在某些本質上
的一致性，構造了一種新的多級代理簽名體制。在這個簽名體制中，代理簽名者可以將原始 簽名者的簽名權利進一步委托給新的代理簽名者，使得新代理簽名者也能夠代表原始簽名者生成有效的數字簽名。
關鍵詞：密鑰絕緣；代理簽名；多級代理

Multiple grade proxy signature scheme based on key-insulated scheme CHENG Hua’qin, GAO Feng’xiu, MA Chuan’gui （Institute of Information Engineering, Information Engineering University, Zhengzhou, 450002） Abstract: Through analyzing the relation between key-insulated scheme and multiple grade proxy signature scheme, we find there are some identities and construct a new multiple grade signature scheme based on key-insulated scheme. In this scheme, a proxy signer can delegate his signing capabilities to a new proxy signer who could generate the signature on behalf of the original signer.
Key words: key-insulated; proxy-signature; multiple-grade-proxy