Quantum computing provides an imminent threat to conventional cryptographic schemes; algorithms run on quantum computers directly risk the public encryption keys used in these types of cryptosystems. In this paper, we present a hybrid cryptosystem that combines pre-quantum algorithms with post-quantum ones to withstand quantum assaults. We simulate conventional and quantum assaults on encrypted data and demonstrate that the suggested hybrid is more resistant to quantum threats. To ensure the model's validity, performance evaluations on time-to-crack and resource efficiency are carried out. Our findings indicate hybrid cryptography as an intermediate approach in the quantum realm.
Quantum computing provides an imminent threat to conventional cryptographic schemes; algorithms run on quantum computers directly risk the public encryption keys used in these types of cryptosystems. In this paper, we present a hybrid cryptosystem that combines pre-quantum algorithms with post-quantum ones to withstand quantum assaults. We simulate conventional and quantum assaults on encrypted data and demonstrate that the suggested hybrid is more resistant to quantum threats. To ensure the model's validity, performance evaluations on time-to-crack and resource efficiency are carried out. Our findings indicate hybrid cryptography as an intermediate approach in the quantum realm.
The rapid development of quantum computing presents a substantial threat to traditional cryptographic algorithms, particularly those relying on mathematical problems such as integer factorization and elliptic curve operations. As a response, the cryptographic community has accelerated the design of post-quantum cryptographic schemes that can withstand attacks from both classical and quantum computers. However, many of these new schemes exhibit inherent trade-offs between performance, key sizes, and implementation complexity. To address this, we propose a novel hybrid cryptographic framework tailored for secure and efficient data transmission in future quantum-aware environments. The proposed system combines three algorithmic paradigms: a lattice-based encryption method for fast and lightweight data protection, a hash-based signature mechanism for authenticity, and a code-based key exchange method to ensure session confidentiality. This layered integration is designed to capitalize on each algorithm’s strengths while mitigating individual limitations. The system is implemented using modular components in a testbed simulating real-world deployments, and its performance is benchmarked across multiple metrics including encryption latency, signature generation time, key sizes, and throughput. Comparative results indicate that the hybrid approach outperforms monolithic schemes in critical areas such as execution time and cryptographic strength under quantum adversary models. The findings support the practicality of using multiple post-quantum primitives in tandem to build robust communication systems. This research contributes a realistic implementation and evaluation of post-quantum security models and highlights key directions for future research and standardization efforts as the global transition to quantum-safe infrastructure begins.
Quantum computing is the future of computing with promised radical increase in processing capability; however, it is a threat the existing cybersecurity paradigm. Classical encryption techniques especially the ones based on public-key cryptography are insecure against quantum algorithms such as Shor’s algorithm where typical cryptographic schemes the use of which was exemplified by the RSA and ECC will be threatened. While torrents of research have been accomplished in building and developing quantum computers, the importance of post-quantum cryptography (PQC) becomes more felt. This paper attempts to look at the threats that quantum technologies pose to current cryptographic methods and the countermeasures that are being worked on to counter them. We do so to evaluate the current status on quantum computing and its ramifications to data security, as well as the work that academic and government institutions and business enterprises have done on coming with Quantum-Resistant Cryptography. In addition, the paper gives an overview of the most promising post-quantum cryptographic techniques including lattice cryptography, hash-based signatures, and code-based cryptosystems and cryptographic protocols that are under consideration as the next generation cryptographic protocols. It also tackles the problems related to the migration to the post-quantum cryptographic systems the problem of standardisation the problem of compatibility, and the problem of growth of new algorithms. Moreover, prescriptive advice on the concept of quantum readiness and timely implementation of cyber defence plans to safeguard sensitive data and crucial infrastructure against quantum risks is provided. Finally, the paper offers suggestions for the organisations for starting to transition to the post-quantum landscape in terms of using hybrid cryptographic systems and promoting cooperation in the fight against the threats of quantum technology world-wide.
This study investigates the performance and security of quantum-resistant cryptographic algorithms, assessing their potential to protect data from quantum computing threats. The research evaluates various cryptographic techniques, including lattice-based, code-based, hash-based, and isogeny-based systems, comparing them in terms of encryption and decryption speeds, memory consumption, computational overhead, and resistance to quantum attacks.Lattice-based algorithms require increased amounts of memory and computational resources yet maintain low simulated attack success rates which makes them optimal for quantum resistance. Research established hash-based cryptosystems operated faster but scientists proved them to be vulnerable to quantum attacks. Scientific experts demonstrated hybrid cryptographic systems based on conventional and quantum-resistant algorithms as a viable security-speed compromise solution. Lattice-based systems maintain the highest level of scalability for extensive systems according to scalability testing results yet multivariate poisson systems show inadequate scalability features. Technical experts confirmed that quantum-resistant cryptographic systems function in reality but organizations require solutions to overcome operational and resource expenditure hurdles. This research creates post-quantum cryptography systems that prove safe and effective through the presentation of algorithm optimization insights and their practical applications framework. The study demonstrates why we need continued development and research to maintain data security because quantum computing will transform in the coming quantum era.
The rapid progress made in the domain of quantum computing has presented a number of opportunities as well as challenges in numerous domains, particularly in the domain of cryptography and security. The extraordinary computational capacity of quantum computing can be used to conduct computations at a much faster rate than classical computing, which makes quantum computing a potential threat to many cryptography systems. This paper presents a focused analysis of quantum computing’s influence on a cryptographic system and the digital data protection. This paper examines the basic concepts of quantum physics and discusses the challenges of classical cryptography protocols, along with the analysis of post-quantum solutions, focusing on the issues of secrecy, verification, and quantum security of these protocols. The evidence collected from various sources proves that quantum algorithms pose a threat to classical public-key cryptosystems; on the other hand, ML-KEM, ML-DSA, and SLH-DSA are the post-quantum solutions. It is imperative that a move to quantum-resistant encryption entails appropriate migration policies and standards alongside technological advancements. Such conclusions suggest that adequate preparedness can help in enhancing the security of encrypted information with advancing quantum technology. This study emphasizes the significance of hybrid cryptographic implementations and cryptographic agility in the changeover from classical cryptography to quantum cryptography security frameworks. Real-world implementation should strike a balance between security power and efficiency of computation among other considerations.
Many traditional encryption techniques commonly used in financial systems face serious threats from the rapid development of quantum computing. Quantum attacks based on Shor's and Grover's algorithm are effective against the RSA, and ECC methods that secure online banking, digital payments, and interbank communications. To mitigate on this increasing risk, this paper suggests hybrid cryptographic architecture based on symmetric encryption, post-quantum cryptography (PQC), and quantum key distribution (QKD) for secure financial transactions. The Quantum-resistant security significance comes because the financial models produce massive data sets for fraud detection and predictive risk. Not only does it offer the previously unreachable computational capabilities, but also utilizes the potentials of large-scale financial data analytics to make the decision-making process fast and well informed, and in this light, the present research recommends a hybrid cryptographic approach with an integrated security framework for the financial sector that combines symmetric encryption, post-quantum cryptography (PQC), and quantum key distribution (QKD). The proposed structure relies on (1) the quantum-resistance of PQC for resilience and authentication, (2) the information-theoretic security of QKD for key establishment, and (3) the efficacy of symmetric cryptography for protecting high-throughput transactions. The framework covers the short-term practical limitations and long-term quantum risks based on the combined use of quantum and conventional security primitives. This paper points out the role and transformation of digital financial ecosystem in the quantum era by elaborating challenges, opportunities and future of quantum cryptography in the banking industry.
Purpose: This study presents a comprehensive post-quantum cryptographic framework designed to secure Critical Digital Public Infrastructure (DPI) against emerging quantum computing threats. Methodology: As traditional cryptographic methods become increasingly vulnerable, the proposed framework integrates post-quantum algorithms, hybrid cryptographic models, and a multi-layered architecture to ensure long-term data protection. The system is evaluated using key performance metrics such as latency, throughput, energy consumption, overhead, key size, and security strength. Additionally, an algorithm selection strategy is implemented to identify optimal cryptographic techniques. Findings: Simulation results demonstrate that classical models offer better efficiency, while post-quantum approaches provide stronger security at the cost of higher resource usage. The hybrid model effectively balances these trade-offs, delivering improved security with moderate performance impact. Unique Contribution to Theory, Policy and Practice: Overall, the framework provides a scalable, adaptable, and future-ready solution for protecting critical infrastructure in a rapidly evolving digital and quantum landscape.