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cs.CR2025
Enhanced Rényi Entropy-Based Post-Quantum Key Agreement with Provable Security and Information-Theoretic Guarantees
Ruopengyu Xu, Chenglian Liu
This paper presents an enhanced post-quantum key agreement protocol based on Rényi entropy, addressing vulnerabilities in the original construction while preserving information-the…
cs.CR2025
Tight Quantum-Security Bounds and Parameter Optimization for SPHINCS+ and NTRU
Ruopengyu Xu, Chenglian Liu
The imminent threat of quantum computing necessitates quantum-resistant cryptosystems. This paper establishes tight security bounds for two NIST PQC finalists: SPHINCS+ (hash-based…
cs.CR2025
Towards Enhanced Quantum Resistance for RSA via Constrained Rényi Entropy Optimization: A Theoretical Framework for Backward-Compatible Cryptography
Ruopengyu Xu, Chenglian Liu
The advent of quantum computing poses a critical threat to RSA cryptography, as Shor's algorithm can factor integers in polynomial time. While post-quantum cryptography standards o…