Abstract: In order to provide reliable data transmission in the era of big data,signature technology is often applied to data communication.One type of attribute based signature technology can ensure signature anonymity by allowing users to create and verify signatures without disclosing sensitive information of the signer.However,validators can also verify whether the attribute periodhas expired normally,and users who do not require signature authorization can create and use existing signature keys and attributes to sign.To solve this problem,a signature scheme based on traceable attributes with anonymous certificates is proposed.Firstly,the validity of the signer is verified by using the pseudonym ID contained in the user list in the cloud server.If an unauthorized signer creates a signature using an existing signature key and attribute,the cloud server will use the user list to verify the signer,whose identity is represented as a transfer based pseudonym ID.Next,based on signature verification to determine the storage of signed messages,cloud servers can prevent unauthorized signers from continuously generating and sending signatures.If there is a problem,the identity of the signer can be verified through tracking.If the signature obtained by the verifier is unclear or problematic,the identity of the signer can be verified through AA and TA.Finally,the anonymity of the signer is provided to the verifier,and the integrity of the message is ensured through the verification phase.This signature scheme protects signatories who abuse anonymity by disclosing their signature keys and attributes for certain purposes,as well as protecting unauthorized users from using public information to sign and send messages.

Key words: Traceability, Data security, Cryptography, Attribute signature