Quantum Computers are disrupting the traditional cryptographic algorithms, like RSA and ECC. These Traditional cryptographic algorithms are generally used for network communication, basically like SDN’s (Software Defined Networking). Now to address these Challenges the NIST (National Institute of Standards and Technology) proposes post quantum algorithms (PQC) which are designed to resist the Quantum Computers. Now, the transition from traditional algorithms to PQC in SNDs is no easy task, it needs to properly address issues of transitioning like higher processing demands, compatibility issues with existing infrastructure, and no proper guidelines to deploy PQC which is secure and scalable. This paper proposes a hybrid approach, i.e. a stepping stone to help SDNs shift from traditional cryptography algorithms to quantum-safe environments. It includes a step by step transition plan, from layer to layer to help the environment transition to PQC without any major disruption to existing networks.
Quantum Computers are disrupting the traditional cryptographic algorithms, like RSA and ECC. These Traditional cryptographic algorithms are generally used for network communication, basically like SDN’s (Software Defined Networking). Now to address these Challenges the NIST (National Institute of Standards and Technology) proposes post quantum algorithms (PQC) which are designed to resist the Quantum Computers. Now, the transition from traditional algorithms to PQC in SNDs is no easy task, it needs to properly address issues of transitioning like higher processing demands, compatibility issues with existing infrastructure, and no proper guidelines to deploy PQC which is secure and scalable. This paper proposes a hybrid approach, i.e. a stepping stone to help SDNs shift from traditional cryptography algorithms to quantum-safe environments. It includes a step by step transition plan, from layer to layer to help the environment transition to PQC without any major disruption to existing networks.
Conventional cryptographic algorithms that are widely used in Software-Defined Networking (SDN), cloud computing, and edge computing infrastructures are facing a serious challenge because of the fast development of quantum computing. The traditional public-key cryptography like RSA and Elliptic Curve Cryptography (ECC) is believed to be vulnerable to quantum attacks, which will require quantum-resistant security mechanisms to be adopted. The past few years have seen a focus on incorporating Post-Quantum Cryptography (PQC), Quantum Key Distribution (QKD), Artificial Intelligence (AI), blockchain, and Zero Trust Architecture (ZTA) into SDN, with the aim of creating secure, programmable, and intelligent communication infrastructures. The paper summarizes the recent progress in post-quantum secure SDN in cloud and edge computing. The study starts by examining how lattice-based cryptographic algorithms like CRYSTALS-Kyber and CRYSTALS-Dilithium can be integrated in SDN controllers and SDN programmable networks. Then, hybrid QKD-PQC architectures for quantum-safe communication are discussed, followed by intelligent SDN architectures based on AI-powered threat detection, blockchain-based trust management, and adaptive cryptographic orchestration. Moreover, the paper reviews recent advances, summarizes research challenges, and points towards scalable, autonomous, and quantum-resistant networking infrastructures for next-generation cloud, IoT, edge and 6G networks and ecosystem
The imminent emergence of quantum computers poses unprecedented challenges to the current cryptographic standards that secure vital digital communications and data worldwide. This paper addresses the vulnerabilities of existing cryptographic systems susceptible to quantum-based attacks and emphasizes a dedicated transition plan to post-quantum cryptography (PQC). We first examine the current state of cryptographic practices, highlight the quantum threat, and present the framework and need for PQC. In addition, a comprehensive strategy is presented that encompasses the identification, protection, detection, response, and recovery phases and integrates PQC into existing security infrastructures, specifically the Cybersecurity Framework Version 2.0 of the National Institute of Standards and Technology (NIST). Methods and technologies discussed include the development of robust PQC algorithms, tools for their large-scale implementation, and hybrid cryptographic systems that combine traditional and quantum-resistant techniques. Practical implementations on various hardware and software platforms are also presented in case studies that provide real-world insight into the challenges and innovations in using PQC. We conclude with a discussion of hybrid approaches, regulatory considerations, and recommendations derived from early adopters to guide future efforts to create a quantum-resilient digital landscape.
In today's world, several cryptographic algorithms are used to secure information and defend against traditional computing attacks. However, as computer science continues to evolve with the development of Quantum computing, it poses a threat to traditional cryptographic methods. To address this, Post-Quantum Cryptography (PQC) algorithms have emerged as a critical area of research, aiming to provide secure communication channels that are resistant to quantum attacks. Similarly, advancements in network infrastructure have paved the way for programmable networks known as Software-Defined Networks (SDN). Communication channels in SDN may be vulnerable to quantum attacks. To fortify these channels, the integration of PQC into SDN needs to be studied. This paper evaluates the deployment of the PQC algorithms ML-KEM and ML-DSA, standardized by the National Institute of Standards and Technology (NIST), in SDN. The performance of a quantum-resistant communication channel is compared against the channel with traditional cryptographic approaches in an SDN environment. The result demonstrates that integrating the secure channel in SDN using PQC is not only feasible but also a promising solution for enhanced security. However, the larger key sizes of the PQC algorithms lead to longer handshake duration, although overall performance remains largely balanced. This highlights the need for trade-offs in security, performance, and resource utilization when transitioning to PQC based communication channel in SDN.
As the era of quantum computing approaches, the fundamental cryptographic primitives securing global communications face a paradigm shift. With the National Institute of Standards and Technology (NIST) finalizing new standards, the industry must urgently address the vulnerabilities of legacy systems. The imminent advent of CRQCs (Cryptographically Relevant Quantum Computers) poses an existential threat to the Public Key Infrastructure (PKI) underpinning the global digital economy. Classical algorithms such as RSA and ECC (Elliptic Curve Cryptography) are vulnerable to polynomial-time cryptanalysis via Shor’s algorithm. This study investigates the HNDL (Harvest Now, Decrypt Later) threat model and evaluates the resilience of NIST-standardized PQC (Post-Quantum Cryptography) algorithms: ML-KEM and ML-DSA. Utilizing a high-performance Fortinet networking environment, we experimentally validate that "Hybrid Mode" IPsec VPNs can achieve quantum resistance with negligible performance degradation, offering a viable migration path for enterprise infrastructure. Specifically, we benchmark the trade-offs between PQC’s larger key sizes and network latency, demonstrating that the overhead remains within acceptable operational thresholds. Implementing hybrid protocols provides a critical transition mechanism, allowing organizations to secure long-term data confidentiality against retrospective decryption while preserving interoperability with legacy systems.
Cloud systems urgently need to switch to Post-Quantum Cryptography (PQC) since the majority of traditional cryptographic algorithms will become vulnerable due to the looming danger of quantum computing. The methodical approaches for switching from conventional cryptography (such as RSA and ECC) to PQC algorithms established by the National Institute of Standards and Technology (NIST) are examined in this study. We look at performance bottlenecks, cloud-native issues, migration phases customized for service-oriented architectures, hybrid deployment models that blend classical and quantum-resilient algorithms, and backward compatibility techniques. The trade-offs between security and performance are demonstrated through experimental research in a cloud setting, with a focus on protocol support, adaptive key management, and incremental migration. Our research aims to help security engineers and cloud architects implement PQC in practice while preserving scalability, compliance, and service quality.
As quantum computing advances, current cryptographic protocols are increasingly vulnerable to quantum attacks, particularly those based on Public Key Infrastructure (PKI) like RSA or Elliptic Curve Cryptography (ECC). This paper presents a comprehensive review of Post-Quantum Cryptography (PQC) as a solution to protect digital systems in the quantum era. We provide an in-depth analysis of various quantum-resistant cryptographic algorithms, including lattice-based, code-based, hash-based, isogeny-based, and multivariate approaches. The review highlights the National Institute of Standards and Technology (NIST) PQC standardization process, highlighting key algorithms, such as CRYSTALS–Kyber, CRYSTALS–Dilithium, Falcon, and SPHINCS+, and discusses the strengths, vulnerabilities, and implementation challenges of the leading algorithms. In addition, we explore transition strategies for organizations, emphasizing hybrid cryptography to ensure backward compatibility during migration. This study offers key insights into the future of cryptographic standards and the critical steps necessary to prepare for the transition from classical to quantum-resistant systems.