A Lattice-based Linkable Ring Signature Scheme for Blockchain Privacy Protection

This paper presents a new blockchain scheme using a linkable ring signature algorithm based on lattice cryptography. This scheme counters quantum attacks on blockchain transaction signatures. The signature algorithm ensures correctness, anonymity, and unforgeability using trap generation and rejection sampling. It’s resilient to quantum attacks due to lattice cryptography’s hardness. Compared to other lattice-based algorithms, it offers reduced signature generation and verification time, minimized signature length, lower storage requirements, and better scalability. Implementing this scheme supports blockchain transaction security and privacy, promoting blockchain’s sustainable development and widespread application. This research enhances blockchain security against quantum attacks, paving the way for more secure and efficient blockchain-based apps.