In the rapidly evolving field of quantum computing technology, Post-Quantum Cryptography (PQC) plays a pivotal role in developing secure cryptographic systems that are resistant to both quantum and classical computers. This paper focuses on the integration and implementation of PQC algorithms such as Falcon and Dilithium for digital signatures, as well as Crystal-Kyber for key encapsulation mechanisms. Through a server-client model, the study has deployed a post-quantum secure communication service achieving encryption times of less than 2 ms, signing performance up to 50 ms for small files and 11073 ms for large files, and key exchange times as low as 16 ms. These metrics provide deep insights into the resilience and security of the proposed cryptographic solutions in real-world environments.
In the rapidly evolving field of quantum computing technology, Post-Quantum Cryptography (PQC) plays a pivotal role in developing secure cryptographic systems that are resistant to both quantum and classical computers. This paper focuses on the integration and implementation of PQC algorithms such as Falcon and Dilithium for digital signatures, as well as Crystal-Kyber for key encapsulation mechanisms. Through a server-client model, the study has deployed a post-quantum secure communication service achieving encryption times of less than 2 ms, signing performance up to 50 ms for small files and 11073 ms for large files, and key exchange times as low as 16 ms. These metrics provide deep insights into the resilience and security of the proposed cryptographic solutions in real-world environments.
Abstract In the rapidly evolving field of quantum computing technology, postquantum cryptography (PQC) plays a pivotal role in developing secure cryptographic systems that are resistant to both quantum and classical computers. This paper focuses on the integration and implementation of PQC algorithms such as Falcon and Dilithium for digital signatures, as well as Crystal-Kyber for key encapsulation mechanisms. Through a server–client model, the study has deployed a postquantum secure communication service achieving encryption times of less than 2 ms, signing performance up to 50 ms for small files and 11 073 ms for large files, and key exchange times as low as 16 ms. These metrics provide deep insights into the resilience and security of the proposed cryptographic solutions in real-world environments.
Quantum computing threatens classical cryptographic systems, particularly those used in financial security infrastructures. This paper explores the implementation of post-quantum cryptography (PQC) in financial systems, addressing the vulnerabilities of traditional schemes such as RSA, ECC, and Diffie-Hellman. It examines NIST’s standardized PQC algorithms, including Kyber for key exchange and Dilithium and Falcon for digital signatures. The study highlights the role of hybrid cryptographic approaches in ensuring a seamless transition, with a focus on post-quantum TLS 1.3 for secure financial communications. Additionally, blockchain security is analyzed with SPHINCS+ for quantum-resistant signatures. The paper reviews existing research on PQC adoption in financial applications, emphasizing security, performance, and regulatory considerations. The findings underscore the necessity of proactive PQC integration to safeguard financial transactions against quantum threats.
The advent of quantum computing poses significant challenges to traditional cryptographic systems, threatening the confidentiality, integrity and authenticity of digital communications. This paper investigates the integration of Post-Quantum Cryptography (PQC) algorithms into mobile communication systems to address these challenges. The study focuses on evaluating key PQC algorithms shortlisted by the National Institute of Standards and Technology (NIST), including CRYSTALS-Kyber, CRYSTALS-Dilithium, Falcon and SPHINCS+, within the context of 5G and future mobile network architectures. The research encompasses the design and implementation of an experimental framework involving mobile devices, servers, and cloud-based infrastructure to simulate real-world communication scenarios. Performance metrics such as key generation time, signature generation, encryption and decryption speed, and resource consumption were analyzed across various devices to identify algorithms suitable for mobile environments. The findings reveal that lattice-based algorithms, such as Kyber and Dilithium, offer a promising balance between security and efficiency, making them ideal for resource-constrained devices. In contrast, hash-based algorithms like SPHINCS+ exhibit higher computational demands, limiting their practicality in certain applications. This work highlights the importance of algorithm selection and hardware optimization in ensuring secure and efficient communications in the quantum era. By integrating theoretical advancements in PQC with practical applications, this research lays the foundation for quantum-resistant security in mobile networks, ensuring secure and future-ready digital communications.
The rapid advancement of quantum computing poses a fundamental threat to classical cryptographic mechanisms that underpin modern digital security. Shor’s algorithm can efficiently solve integer factorization and discrete logarithm problems, thereby breaking widely used public-key cryptosystems such as RSA, ECC, and Diffie–Hellman. Grover’s algorithm also reduces the effective security of symmetric encryption and hash functions by half. This paper provides a systematic analysis of the impact of quantum attacks on current cryptographic infrastructures, including TLS, digital signatures, and blockchain. We then review the state of post-quantum cryptography (PQC) as standardized by NIST, focusing on three leading candidates: CRYSTALS-Kyber for key encapsulation, and CRYSTALS-Dilithium and FALCON for digital signatures. Through simulation using the Open Quantum Safe (liboqs) library on a standard x86_64 platform, we measure key generation time, encryption/signing speed, decryption/verification latency, and key/signature sizes. Our results show that Kyber-768 achieves key generation in <0.1 ms and produces public keys of about 1.2 KB, while Dilithium-3 generates signatures of ~2.7 KB with verification times under 0.3 ms. Compared to RSA-2048 and ECDSA-P256, PQC algorithms offer competitive performance at the cost of larger key and signature sizes. Based on these findings, we propose a hybrid transition roadmap that combines classical and PQC algorithms in parallel, minimizing risk while maintaining backward compatibility. The paper concludes that organizations should begin immediate preparations for the post-quantum era, especially for data requiring long-term confidentiality.
The Hybrid approach in Quantum Cryptography creates adaptable security model which provides the safest Communication in the emerging quantum era. The development of quantum computing raise questions about the long-term security. Traditional algorithms, such as RSA, ECC, and Diffie-Hellman, which is seemed computationally secure but it can be effectively solved by quantum algorithms such as Shor's and Grover's. This problem leads to the origination of two key trends in current studies, namely Post-Quantum Cryptography (PQC), designing mathematical approaches to encryption resistant to quantum attacks; Quantum Key Distribution (QKD) using the principles of quantum mechanics to assure security in communications. Accordingly, this research proposes a hybrid security framework including reliable data encryption and authentication using PQC, combined with the safe key- exchange method of QKD. The model is implemented in Python, Qiskit, and PQClean's Kyber and Dilithium algorithms to show how these two paradigms can cooperate toward quantum- resilient communication. To present the system performance, key exchange efficiency, computational overhead, and security strength have been considered. According to the results, this hybrid approach gives superior defense against quantum threats while maintaining practical effectiveness for real-world applications such as cloud security, 6G networks, and the Internet of Things.
The advent of quantum computing poses significant challenges to traditional cryptographic systems, threatening the confidentiality, integrity and authenticity of digital communications. This thesis investigates the integration of Post-Quantum Cryptography (PQC) algorithms into mobile communication systems to address these challenges. The study focuses on evaluating key PQC algorithms shortlisted by the National Institute of Standards and Technology (NIST), including CRYSTALS-Kyber, CRYSTALS-Dilithium, Falcon and SPHINCS+, within the context of 5G and future mobile network architectures. The research encompasses the design and implementation of an experimental framework involving mobile devices, servers, and cloud-based infrastructure to simulate real-world communication scenarios. Performance metrics such as key generation time, signature generation, encryption and decryption speed, and resource consumption were analysed across various devices to identify algorithms suitable for mobile environments. The findings reveal that lattice-based algorithms, such as Kyber and Dilithium, offer a promising balance between security and efficiency, making them ideal for resourceconstrained devices. In contrast, hash-based algorithms like SPHINCS+ exhibit higher computational demands, limiting their practicality in certain applications. This work highlights the importance of algorithm selection and hardware optimization in ensuring secure and efficient communications in the quantum era. xi By integrating theoretical advancements in PQC with practical applications, this research lays the foundation for quantum-resistant security in mobile networks, ensuring secure and futureready digital communications.