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.
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.
The advent of quantum computing poses an existential threat to contemporary cryptographic standards, particularly those securing decentralized blockchain networks and cloud infrastructures.Classical public-key cryptosystems such as RSA, ECC, and DH, which rely on factorization and discrete logarithm problems, are rendered obsolete by Shor's algorithm, necessitating the transition toward post-quantum cryptographic (PQC) solutions.This study explores the integration of PQC algorithms, including lattice-based, hash-based, code-based, multivariate, and isogeny-based cryptographic mechanisms, within blockchain-ledger technologies and cloud architectures to ensure long-term security against quantum adversaries.A comparative analysis is conducted to evaluate computational efficiency, key size implications, communication overhead, and security resilience under quantum attack models.The research highlights the adaptation of PQC within blockchain consensus mechanisms, smart contract execution, and cryptographic primitives such as digital signatures, zero-knowledge proofs, and secure multi-party computation (MPC).Additionally, it examines the impact of PQC on cloud security, addressing challenges in quantum-safe key exchange protocols, homomorphic encryption for secure computations, and cross-platform interoperability within hybrid quantum-classical cloud ecosystems.Real-world implementations and benchmarking data provide insights into the feasibility of large-scale adoption, shedding light on standardization efforts by NIST and industry consortia.The study concludes with future directions, emphasizing the need for efficient PQC algorithm optimization, lightweight cryptographic frameworks for IoT-driven blockchain applications, and scalable post-quantum identity management systems.By establishing quantum-resistant security frameworks, this research underscores the imperative need for early adoption to mitigate cryptographic vulnerabilities in the impending post-quantum era.
Quantum computing is progressing at a fast rate and there is a real threat that classical cryptographic methods can be compromised and therefore impact the security of blockchain networks. All of the ways used to secure blockchain like Rivest–Shamir–Adleman (RSA), Elliptic Curve Cryptography (ECC) and Secure Hash Algorithm 256-bit (SHA256) are the characteristic of the traditional cryptographic techniques vulnerable to attack by quantum algorithms: Shor’s and Grover’s algorithms: can efficiently break asymmetric encryption and speed up brute force attacks. Because of this vulnerability, there exists a need to develop an advance quantum resilient blockchain framework to protect the decentralized ledgers from the future threats of the quantum. This research proposes Post-Quantum Cryptography (PQC), Quantum Key Distribution (QKD) and Quantum Random Number Generation (QRNG) as a formidable architectural integration, to fortify security of blockchain. Classical encryption is replaced with PQC, QKD with secure key exchange by detecting eavesdropping, and QRNG with improving cryptographic randomness to remove the predictable key vulnerability. Only with a small loss of transaction efficiency, we increase transaction encryption accuracy, key exchange security, and resistance to quantum attacks. In this quantum enhanced blockchain design, the idea is to preserve the decentralization, transparency and security and at the same time overcome the future quantum threat. By going through rigorous analysis and comparative evaluation, we demonstrate that the approach saves blockchain networks from the emerging quantum risks to make sure that the decentralized finance, smart contracts and cross chain transactions.
The rapid advancements in quantum computing pose significant threats to traditional cryptographic systems, which are foundational to securing modern digital infrastructure. Cryptosystems like RSA and ECC, currently relied upon for secure communications, are vulnerable to quantum attacks, necessitating the development of post-quantum cryptography (PQC). The proposed methodology in this paper focuses on safeguarding critical infrastructure from quantum-based cyberattacks by leveraging PQC. The framework integrates several key strategies: hybrid cryptography, which combines classical and post-quantum algorithms to ensure security even as quantum threats evolve; quantum key distribution (QKD), ensuring secure communication by detecting any interception attempts; and post-quantum algorithms designed to resist quantum computing capabilities. The methodology also includes a robust security layer with incident response and threat monitoring systems to detect anomalies and initiate rapid responses to potential attacks. This holistic approach secures vital sectors like healthcare, energy, and telecommunications by future-proofing cryptographic measures against quantum threats.
The fast-growing development of quantum computing is a great threat to classical cryptographic protocols underpinning the security of blockchain networks. The use of quantum attacks on algorithms, like RSA and Elliptic Curve Cryptography (ECC) used to perform digital signatures and verify transactions, is susceptible to the quantum attack, especially the Shor algorithm. This is an emerging risk that casts doubt on long term reliability and trustworthiness of blockchain systems in their various applications in the fields of finance to the field of healthcare. To overcome this difficulty, new cryptographic primitives exist, developed by the field of post quantum cryptography (PQC), which resist quantum computational power, such as lattice based, hash based, multivariate and code based. This paper examines how quantum-resistant cryptographic algorithms can be implemented into blockchain architecture, and how their security, scalability, and performance impacts can be assessed. Moreover, there are hybrid schemes that adapt classical and quantum safe schemes are taken as the transitional schemes to make backward compatibility. This study identifies practical avenues towards realising quantum resilient blockchain systems that are capable of supporting security in the post quantum era by analysing and comparing their possible implementations.
The advent of quantum computing poses a significant threat to classical cryptographic algorithms that underpin security in cloud-based financial technologies (Fintech). As quantum computers gain computational superiority, traditional encryption schemes such as RSA and ECC are becoming increasingly vulnerable to quantum attacks, necessitating a paradigm shift toward quantum-resistant cryptography. This study investigates the integration of post-quantum cryptographic (PQC) frameworks within cloud-based Fintech architectures to ensure data confidentiality, transaction integrity, and regulatory compliance in a post-quantum era. The research evaluates lattice-based, hash-based, and multivariate polynomial cryptosystems in terms of performance efficiency, scalability, and interoperability with existing cloud infrastructures. Using simulated Fintech transaction datasets, the study benchmarks cryptographic resilience and latency overheads in multi-cloud environments. The findings highlight that lattice-based schemes, particularly CRYSTALS-Kyber and Dilithium, offer a promising balance between computational feasibility and robust security against quantum adversaries. The paper concludes with recommendations for hybrid encryption deployment strategies and policy-level frameworks to facilitate the transition to quantum-resistant Fintech ecosystems.
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.