A new type of digital multisignature

Information security is very important in CSCW and digital signature is one of the valid methods to resolve these problems. Based on research on multisignature and proxy signature, we present a new type of signature: Multisignature with proxy, in which some signers can delegate their proxies to do the signatures. The common multisignature and the proxy multisignature are specific to this signature. Two new schemes of multisignatures mingled with proxy signers are introduced in this paper, and their security issues are analyzed as well.