Hybrid cryptographic protocol was proposed by integrating quantum-safe algorithms (Kyber and Dilithium) together with a classical ECDSA-based signature scheme to verify secure proof on blockchain. Since quantum computers pose some loopholes in existing cryptography algorithms, the proposed mechanism addresses those vulnerabilities by maintaining compatibility with the existing infrastructure. The protocol integrates post-quantum key exchange to derive shared secrets securely. The shared secrets are used to enable hybrid encryption for efficient data protection. Additionally, the implementation uses a dual-signature approach, using quantum safe and classical signatures. These signatures are combined to ensure robust and tamper-resistant proof verification. The deployed solution validates its feasibility and efficiency for smart contract-based verification. The protocol maintains backward compatibility with existing systems while providing strong resistance to quantum attacks. Benchmark results demonstrate the system’s scalability and robustness under high transaction loads, with efficient gas usage for on-chain proof validation. This approach paves the way for post-quantum secure applications, including verifiable proofs, secure key exchanges, and decentralized systems resilient to quantum adversaries.
Hybrid cryptographic protocol was proposed by integrating quantum-safe algorithms (Kyber and Dilithium) together with a classical ECDSA-based signature scheme to verify secure proof on blockchain. Since quantum computers pose some loopholes in existing cryptography algorithms, the proposed mechanism addresses those vulnerabilities by maintaining compatibility with the existing infrastructure. The protocol integrates post-quantum key exchange to derive shared secrets securely. The shared secrets are used to enable hybrid encryption for efficient data protection. Additionally, the implementation uses a dual-signature approach, using quantum safe and classical signatures. These signatures are combined to ensure robust and tamper-resistant proof verification. The deployed solution validates its feasibility and efficiency for smart contract-based verification. The protocol maintains backward compatibility with existing systems while providing strong resistance to quantum attacks. Benchmark results demonstrate the system’s scalability and robustness under high transaction loads, with efficient gas usage for on-chain proof validation. This approach paves the way for post-quantum secure applications, including verifiable proofs, secure key exchanges, and decentralized systems resilient to quantum adversaries.
The advent of quantum computing threatens the cryptographic security of traditional blockchain systems, potentially rendering current encryption techniques obsolete. This paper explores quantum-resistant blockchain protocols that leverage post-quantum cryptographic algorithms to ensure secure transactions. We analyze various quantum-safe cryptographic methods, such as lattice-based, hash-based, and multivariate polynomial cryptography, evaluating their feasibility for blockchain applications. Through comparative analysis, we discuss their computational efficiency and security guarantees. Our findings suggest that integrating quantum-resistant cryptographic techniques into blockchain frameworks is essential for future-proofing decentralized systems. This paper explores the integration of quantum-resistant cryptographic algorithms within blockchain technology. The proposed approach utilizes CRYSTALS-Dilithium for digital signatures, ensuring secure transaction verification in a post-quantum era. While Kyber is a robust key exchange mechanism, it is not suitable for signing transactions. The implementation is tested on standard hardware, demonstrating feasibility without requiring specialized quantum computing infrastructure.
Blockchain systems are fundamentally dependent on classical cryptographic primitives, which are increasingly threatened by the rapid advancement of quantum computing. In cross-chain communication and interoperability protocols, where safe asset transfer and validation across heterogeneous networks are crucial, this danger is especially serious. Ensuring quantum-resilient interoperability is crucial for preserving security, trust, and long-term sustainability as next-generation blockchain ecosystems move toward multi-chain architectures. Relays, bridges, and atomic swaps are examples of existing interoperability methods that mostly rely on public-key cryptography, which is susceptible to quantum assaults like Shor's algorithm. In the post-quantum era, this vulnerability puts digital assets and cross-chain transactions at risk of compromise. This paper suggests a quantum-resilient cross-chain interoperability protocol framework to overcome this difficulty and allow safe and effective communication between various blockchain platforms. The suggested design incorporates post-quantum cryptographic techniques, such as hash-based and lattice-based signature algorithms, with consensus bridging and cross-chain transaction validation procedures. Additionally, a hybrid cryptographic transition model is presented to provide a progressive transition towards quantum-safe primitives while guaranteeing backward compatibility with current classical systems. The proposed structure greatly increases resilience against quantum attackers while maintaining interoperability efficiency, according to experimental evaluation. Robustness against replay attacks, signature forging, and key compromise under quantum threat models is confirmed by security analysis. The suggested protocol ensures strong and quantum-resilient interoperability in next-generation blockchain infrastructures by offering a scalable and future-ready foundation for safe multi-chain ecosystems.
The rise of quantum computers threatens the security of current TLS protocols, which rely on elliptic curve and RSA-based primitives that quantum algorithms like Shor's can break. This creates a “store now, decrypt later” risk, where attackers may collect encrypted data today to decrypt it in the future once quantum capabilities advance. This study introduces a novel hybrid TLS protocol that seamlessly integrates classical (ECDSA and X25519) and post-quantum (CRYSTALS-Dilithium5 and CRYSTALS-Kyber1024) primitives. The proposed method generates a composite X. 509 certificate dual-signed with ECDSA and Dilithium5. It conducts a key exchange that concatenates an X25519 Diffie-Hellman shared secret with a Kyber KEM shared secret, followed by HKDF-SHA256 key derivation. The entire protocol is implemented in Go, leveraging the OQS liboqs-go library alongside Go's standard crypto packages. Experimental validation via a proof-of-concept demonstrates successful hybrid certificate validation and secure session establishment with both classical and post-quantum peers. These results confirm that hybrid cryptographic integration can provide quantum-resilient security while preserving compatibility with existing TLS deployments.
The advent of quantum computing poses a threat to the bases of classical cryptographies and thus the RSA and ECC are susceptible to attacks at the time of a poly with Shors algorithm. The present paper proposes QUBE-Crypto (Quantum Unbreakable Blockchain-Enhanced Cryptography) which is a new multi-layered protocol that facilitates a synergistic combination of Quantum Key Distribution (QKD) that can provide information-theoretic key protection, Post-Quantum Digital Signatures (Dilithium-5, SQIsignHD) that offer computational authentication resilience, blockchain-based immutable identity anchoring and Pseudorandom Quantum State (PRS) challenges that can provide unforgeable verification. Unlike existing approaches that address quantum threats in isolation, QUBE-Crypto provides end-to-end quantum-safe communication by combining provably secure key exchange, quantum-resistant signatures, decentralized trust, and clone-proof authentication. The protocol is formally specified through a five-phase algorithm encompassing initialization, QKD-based session key establishment, PRS-based challengeresponse authentication, blockchain-anchored verification, and encrypted message exchange. Applications span IoT security, smart cities, digital voting, and decentralized identity systems requiring resilience against both classical and quantum adversaries.
As the advent of quantum computing threatens traditional cryptographic protocols, hybrid classical-quantum secure communication infrastructures have emerged as a critical frontier in cybersecurity. This paper explores the integration of post-quantum cryptographic algorithms—specifically CRYSTALS-Kyber for key encapsulation and CRYSTALS-Dilithium for digital signatures—into hybrid communication architectures designed to resist quantum-level attacks. Leveraging lattice-based cryptographic primitives, both algorithms have been selected for standardization by NIST due to their robust security and performance characteristics. This study evaluates their implementation in real-world communication stacks, assesses latency and throughput under hybrid channel configurations, and proposes a layered security architecture combining classical and quantum-resilient mechanisms. Furthermore, it examines key management, digital trust, and infrastructure scalability in a post-quantum context. Simulation results and hardware-based validations are used to determine practical deployment feasibility in critical sectors such as finance, defense, and healthcare. The findings offer a comprehensive framework for securing data in transitional computing eras, ensuring forward secrecy, and maintaining operational integrity against future adversarial quantum threats.
The rise of quantum computing poses a serious threat to the cryptographic backbone of decentralized systems like Ethereum's Plasma chains, which rely on classical cryptography. This paper introduces a novel approach, integrating post-quantum cryptography (PQC) with hybrid frameworks that blend quantum-resistant algorithms with traditional cryptographic techniques. This hybrid approach ensures strong quantum-resistant security while maintaining Plasma's scalability, performance, and compatibility with Ethereum's ecosystem. This study focuses on critical plasma components like state transitions, fraud proofs, and exit strategies, that are most vulnerable to quantum attacks, proposing hybrid cryptography for low risk, high frequency transactions, while leveraging post-quantum solutions like Kyber and NTRU for securing long-term commitments and high-risk processes. By establishing clear decision criteria to determine when hybrid cryptography should take precedence over pure PQC, based on factors such as computational efficiency, security demands, and system interoperability. The insights set a new standard for Plasma's quantum resilience, ensuring it stays secure and adaptable as quantum computing evolves, paving path for decentralized finance to thrive in the face of quantum threats.