Aggregate Signature with Single-Transaction Verification for Blockchain

Blockchain has gradually become one of the important technologies concerned by many cross fields. Since the concept of blockchain has been proposed and implemented, a large number of new environments (such as smart cities, smart grids, electronic medicine, etc.) have been enabled by blockchain, while more security features, such as tamper resistance and traceability, have been realized. The verification of transaction records in the blockchain is particularly important for the implementation of the blockchain. Some researchers have achieved the recording and signing of transaction information on the blockchain through specific structures. However, the aggregation of transaction signatures and the verification of single transactions are still worthy of further study. An aggregate signature is proposed in this paper for blockchain, supporting single-transaction verification. This scheme can increase the flexibility of blockchain transaction information verification. When the committer deletes a single signature and only retains the aggregation result, it can effectively verify a single transaction. The analysis shows that the signature generated in this scheme is unforgeable and the verification of a single transaction is efficient.