This seminar comprehensively examines the existential threat quantum computing poses to blockchain security infrastructures. Shorʹs algorithm can efficiently break ECDSA signatures used to secure Bitcoin an‎d Ethereum transactions, enabling fund theft through private-key derivation. Groverʹs algorithm reduces the security margin of hash functions by half, compromising proof-of-work mining an‎d Merkle tree integrity. The "Harvest Now, Decrypt Later" attack strategy renders todayʹs blockchain data vulnerable to future decryption. Urgent migration to quantum-resistant cryptographic frameworks has become imperative for long-term data protection. The research eva‎luates hybrid security architectures combining NIST-stan‎dardised post-quantum cryptography with quantum hardware solutions. Lattice-based algorithms such as CRYSTALS-Dilithium an‎d KYBER provide quantum-resistant digital signatures an‎d key encapsulation with acceptable performance overhead. Quantum Key Distribution protocols (BB84 an‎d E91) deliver information-theoretic security for node communications through quantum physics principles. Hybrid integration creates defence-in-depth by pairing PQCʹs authentication capabilities with QKDʹs confidentiality guarantees. This layered approach addresses the full spectrum of quantum threats while maintaining blockchain functionality. Implementation requires careful transition planning due to the blockchainʹs decentralised nature an‎d constraints on immutability. Hardware acceleration using FPGAs an‎d ASICs mitigates performance penalties associated with larger key sizes an‎d slower computation. Account abstraction mechanisms enable gradual migration without disruptive hard forks across distributed networks. The research concludes that the proactive adoption of quantum-secure frameworks is critical before cryptographically relevant quantum computers become available. Future work must focus on crypto-agility, the integration of quantum networking, an‎d stan‎dardised interoperability protocols for sustainable quantum-safe blockchain ecosystems.

2/18/2026 12:00:00 AM

89778

1404/12/01

Review of Quantum Secured Blockchain Framework for Enhancing Post-Quantum Data Security

Quantum Computing , Post-Quantum Cryptography , Blockchain Security , Quantum Key Distribution (QKD) , Shorʹs Algorithm , Groverʹs Algorithm , NIST PQC Standards , Hybrid Cryptographic Frameworks , Quantum-Resistant Signatures , Consensus Mechanisms , Self-Sovereign Identity , Crypto-Agility