In the last few years, along with digital signature study thoroughly, many special of digital signature were produced, such as proxy signature, blind signature, multi-signature, threshold signature and group signature etc.

• 随着数字签名研究的深入，近几年来，产生了不少特殊的数字签名，如代理签名、盲签名、多重签名、门限签名和群签名等。 由这些签名又产生了很多更特殊的签名，如代理多重签名、多重代理签名、多重代理多重签名和门限群签名等等。