关键词: 基于身份, 盲签名, 代理签名, 门限签名, 多代理多盲签名

Abstract: In order to improve the practicality and flexibility of proxy blind signature，this paper proposes an identity-based threshold multi-proxy blind multi-signature scheme by adopting identity-based cryptography and secret sharing scheme.In this scheme，the administrators of the original group and proxy group can control the behavior of their members by distributing the shared secrets.After original signers and proxy signers obtain the shared secrets，some original signers can cooperatively delegate their signing capability to proxy signers，and some proxy signers can cooperatively generate threshold multi-proxy blind multi-signature.The scheme solves how to generate blind signature while multiple proxy signers sign the message on behalf of multiple original signers.By analyzing the scheme，it is concluded that the scheme has many security properties，such as unforgeability，nonrepudiation，blindness，untraceability，robustness etc.

Key words: identity-based, blind signature, proxy signature, threshold signature, multi-proxy blind multi-signature