Abstract: Proxy multi-signature schemes can be implemented a proxy signature on behalf of multiple original signers. Threshold signature scheme does not require the participation of all members to form a valid signature. As long as most of the members participate, the signature is valid. This paper discusses a multi-threshold proxy signature scheme which is a combination of the two signature ways mentioned above. The program has both the multiplicity of agency, but also has the flexibility of threshold. Meanwhile, use of forward secure features, the proxy secret key for the timing of updates, both to ensure the security of the scheme, and also can control the proxy signature time of the proxy signer.

Key words: proxy signature, threshold digital signature, multisigncryption scheme, forward secure

摘要： 代理多重签名可以实现一个代理签名同时代表多个原始签名者，门限签名方案，签名的生成不需要所有成员的参与只要部分成员参与就可形成有效的签名，将这两种签名方式结合，构造一个代理多重门限签名方案。该方案既具有代理权的多重性，又具有门限的灵活性和安全性。同时，利用前向安全的特性，对代理密钥进行时间性的更新，既保证了方案的安全性，又对代理权的有效时间进行控制。

关键词: 代理签名方案, 门限签名, 多重加密, 前向安全