Quantum-Resistant Blockchain Using CRYSTALS-Dilithium for Secure Transactions

Abstract

Cryptographic digital signatures are essential to blockchain systems' transaction integrity and authenticity. However, traditional encryption methods like RSA and Elliptic Curve Cryptography (ECC) are under threat from the quick development of quantum computing, leaving current blockchain infrastructures open to potential quantum assaults. In order to ensure transaction verification, this study suggests a quantum-resistant blockchain system that makes use of the CRYSTALS-Dilithium postquantum digital signature technique. Interoperability between classical and post-quantum signatures is made possible by the use of a hybrid cryptographic technique. Additionally, before being stored on the blockchain, every transaction data is encrypted using the Advanced Encryption Standard (AES) to improve data confidentiality. A simulation environment that facilitates the creation and verification of multi-user transactions is used to construct and assess the suggested framework. While RSA has a shorter execution time, CRYSTALS-Dilithium gives far higher security assurances against quantum attackers, according to performance research utilizing latency measurements. The findings validate the viability and efficiency of combining encrypted data storage and quantum-resistant encryption for safe, future-proof blockchain transactions.