Quantum-Resistant Blockchain Protocols For Secure Transactions

Abstract

Background: Digital signatures are crucial for ensuring the authentication of deals in a blockchain system. The introduction of quantum computing, however, can be a real danger to these types of systems, as it allows for hackers to break the widely used cryptographic systems, such as RSA, ECC and AES. To overcome this shortcoming, a quantum-resistant digital signature verification mechanism using the CRYSTALS-Dilithium algorithm is suggested for securing transactions in the post-quantum era. The method is based on a signature architecture mixture of classical and quantum -safe methods, providing backward compatibility and enhanced security. This process consists of transaction creation, digital signature, transaction broadcasting, transaction validation, and block formation and a consensus. User registration and transaction processing is carried out by smart contracts in a tamper-proof Blockchain ecosystem. In addition, the data of transactions are protected from unauthorized transactions and ensured privacy is maintained by AES. Performance investigation shows that the hybrid CRYSTALS-Dilithium algorithm has somewhat higher latency than RSA and ECC, but greatly enhances resilience to quantum attacks. In conclusion, the combination of quantum-safe cryptography and Blockchain promises to create a robust and sustainable platform for future digital transactions, providing long-term security, scalability, and interoperability for decentralized systems.