Fully Anonymous Blockchain Constructed Based on Aggregate Signature and Ring Signature

摘要

Aiming at the problem that transaction amount and the identity of the two parties can be analyzed and predicted to reveal the privacy of the user from the open and transparent transaction information in the traditional Bitcoin system, a fully anonymous blockchain system is constructed by combining the aggregate signature and the ring signature in this paper. The scheme combines the advantages of aggregate signature and ring signature, uses aggregate signature to protect the transaction amount privacy, uses ring signature to protect the address privacy of both parties, and at the same time compresses the transaction information size while protecting the privacy, saving a certain space overhead. Through comparing with the evaluation and analysis of various blockchain privacy protection schemes, it is concluded that the scheme takes both security and performance into account, that is, the privacy protection of transaction information is greatly improved when the reasonable overhead is increased.