A Trading Scheme of Power Blockchain Based on Identity-Based Ring Signature for Anonymity and Anti-Forgery

Privacy is important in power blockchain. For privacy of distributed power transactions, we propose a SM9-compliant anonymous transaction scheme combining identity-based cryptography and ring-signature techniques, solving the complex management problem of public key and certificate while maintaining user privacy. We prove the unforgeability and anonymity of this scheme under the stochastic prediction model, which provides a secure and trustworthy anonymous transaction mechanism in the absence of a trusted transaction center. Experiments show that compared with the RSA ring signature, the scheme in this paper is superior in terms of communication cost and resource consumption, and can provide support for distributed power transactions.