In response to the drawbacks of low portability of secret key in signature algorithms, an attribute-based secret key signature algorithm (ASKS) is constructed in this paper. In the process of generating user public keys using attributes, polynomial based on the secret sharing technology and the fuzzy vault idea are used to protect user attribute features. Because ASKS does not require users to store attribute features, it does not require users to store keys, which eliminates the communication overhead of the secret key.