DefinePK

Abstract

Exponential advancements in quantum computing threaten existing cryptographic structures, including Merkle Trees, due to their dependence on classical hash functions and public-key encryption schemes. The paper presents QRMT as a new cryptographic structure that implements zk-STARKs along with lattice-based cryptography and hash function randomization to achieve improved security and better performance. Benchmarks demonstrate that QRMT reduces proof generation time by 28–32% compared to classical Merkle Trees under Grover’s algorithm attacks, while maintaining logarithmic-scale verification efficiency. The QRMT utilizes a hash selection strategy that consists of SHAKE-256 Blake3 and Poseidon hash functions, which protect against Grover’s algorithm attacks. The metadata encryption measures security through Kyber1024, which uses lattice-based public-key encryption to replace RSA and prevent attacks using Shor’s algorithm. Kyber1024 generates keys in ~0.005 ms, which is 75 ms faster than RSA-4096’s. The zk-STARK-verified process allows for trustless and extensive proof verification while protecting confidential information. Our proof-of-concept instance maintains efficient behavior because proof creation and verification times grow at less than a logarithmic rate while the data collection expands. This framework creates quantum resistance for blockchain security, which enables distributed secure systems and establishes new cryptographic technology options.