A certificateless ring signature scheme based on lattice

Abstract

For the problems that ring signature needs key escrow, has some security risks, and cannot avoid malicious key generation center (KGC) in the post-quantum era, we design a certificateless ring signature scheme based on lattice (L-CRSS). In our scheme, the bimodal Gaussian distribution is used to improve the security and efficiency. Compared with the previous ring signature scheme based on lattice, our design does not need key escrow, does not disclose the signer's identity, can avoid malicious KGC, achieves the constant signature size, and has higher security and efficiency in the post-quantum era.Finally, under random oracle model (ROM), we prove that our scheme is anonymous against the full-key exposure, and existentially unforgeable against adaptive chosen message attacks (EUF-CMA).

Efficient Ring Signature for Cross-chain Data Sharing in Blockchain-enabled Cold-chain Logistics System

“…For the scheme in Ref. [26], these three items are all bigger than that in this RS scheme. Therefore, this RS scheme is efficient than similar schemes.…”

“…With the rapid developments of quantum computing, post-quantum encryption becomes more and more popular and practical for information systems to resist the quantum attacks in the coming quantum computer age. Some ring signature schemes with lattice assumptions have been introduced in recent years, which are constructed with different lattice assumptions and applied in different areas [25][26]. For the cold-chain logistics data sharing in BCCLS, the ring signature is more suitable to establish a secure verification mechanism among many different cold-chain logistics workers and devices.…”