Mobile communication networks are becoming more ubiquitous than ever and are rapidly evolving with increasing adoption beyond traditional services such as voice and data. With 5G and emerging 6G standards, wireless communication networks are expected to play a critical role in various domains including AI-enabled services, robotics, industrial automation, and human critical services. In this context, ensuring the security of mobile networks through a security-first design approach is paramount. Current classical cryptosystems in communication networks rely on asymmetric key cryptography, which is vulnerable to attacks by adversaries equipped with quantum computing capabilities. To address this, solutions such as Post-Quantum Cryptography (PQC) algorithms standardized by National Institute of Standards and Technology (NIST) and hybrid approaches combining traditional and PQC algorithms have been proposed. The integration of these solutions into future communication systems such as advanced 5G and 6G is crucial to safeguard against quantum threats. Let’s explore how such an integrated network architecture can be envisioned, the impact on various 3GPP (3rdGeneration Partnership Project) procedures that currently use asymmetric cryptography, the transition from hybrid to standalone approaches to replace them, and the key challenges and considerations that must be addressed during this adoption process.
Mobile communication networks are becoming more ubiquitous than ever and are rapidly evolving with increasing adoption beyond traditional services such as voice and data. With 5G and emerging 6G standards, wireless communication networks are expected to play a critical role in various domains including AI-enabled services, robotics, industrial automation, and human critical services. In this context, ensuring the security of mobile networks through a security-first design approach is paramount. Current classical cryptosystems in communication networks rely on asymmetric key cryptography, which is vulnerable to attacks by adversaries equipped with quantum computing capabilities. To address this, solutions such as Post-Quantum Cryptography (PQC) algorithms standardized by National Institute of Standards and Technology (NIST) and hybrid approaches combining traditional and PQC algorithms have been proposed. The integration of these solutions into future communication systems such as advanced 5G and 6G is crucial to safeguard against quantum threats. Let’s explore how such an integrated network architecture can be envisioned, the impact on various 3GPP (3rdGeneration Partnership Project) procedures that currently use asymmetric cryptography, the transition from hybrid to standalone approaches to replace them, and the key challenges and considerations that must be addressed during this adoption process.
In the rapidly evolving telecommunications landscape, the advent of 6 G networks promises unparalleled connectivity and transformative capabilities. However, as the potential of 6G unfolds, so too do the security challenges, particularly in the face of quantum computing advancements. Post-Quantum Cryptography (PQC) emerges as a critical safeguard against potential threats to data integrity and confidentiality in 6 G networks. This paper addresses the critical role of PQC in safeguarding 6 G networks against these quantum-based threats. It analyzes the potential vulnerabilities posed by quantum computing, reviews the existing landscape of quantum-safe cryptographic solutions, and assesses their implications for mobile security. The paper also outlines the necessary steps for transitioning to quantumsafe mobile networks, supported by insights from governmental and institutional recommendations.
With the rapid advancement of quantum computing, existing cryptographic schemes in 4G LTE and 5G networks confront serious security threats. Traditional reliance on protocols like IPsec and Transport Layer Security leaves infrastructure vulnerable to future quantum attacks, particularly “Harvest Now, Decrypt Later” attacks, where adversaries store current encrypted traffic for future decryption. To counter these threats, Post-Quantum Cryptography (PQC) and Quantum Key Distribution (QKD) have become potential solutions. As future 6G networks aim to realize ultra-reliable and ubiquitous secure connectivity, it is essential to incorporate both PQC and QKD solutions to ensure long-term robustness. Therefore, the synergy of these security solutions and 5G draws the attention of researchers and practitioners worldwide. This study systematically reviews the literature in this specific field. We analyzed evidence from reviewed literature to address three research questions, resulting in a novel taxonomy to categorize publications in this area and a vision for a quantum-safe 6G network. Moreover, we discussed several open challenges in 5G, PQC, and QKD, along with future work.
Current cryptographic systems, heavily reliant on classical algorithms, are increasingly vulnerable to the formidable capabilities of quantum computing. Notably, quantum algorithms such as Shor’s and Grover’s pose profound threats by accelerating decryption processes, which could soon make existing cryptosystems ineffective. This paper stresses the critical need and complexity of shifting to Post-Quantum Cryptography (PQC) to safeguard encrypted communications against these emerging quantum threats. It outlines the timeline of the National Institute of Standards and Technology’s (NIST) efforts in standardizing PQC, elucidating the significant challenges and the essential nature of adopting these new standards. While NIST provides structured guidance, transitioning to PQC presents substantial risks and difficulties, particularly in terms of organizational adaptation and the technical overhaul required. The discourse further explores the tangible implications of quantum advancements on both symmetric and asymmetric key cryptography, highlighting the potential vulnerabilities and the increased risk of security breaches. The paper underscores the imperative for immediate action in initiating the transition towards robust PQC systems, given the rapid development and anticipated deployment of quantum computing technologies capable of decrypting currently secure information. This transition is not merely a technical upgrade but a crucial strategic move to preemptively counteract quantum threats, ensuring the continued confidentiality and integrity of sensitive data across various sectors.
As quantum computing capabilities accelerate, together with the discovery of Shor's Algorithm, existing encryption protocols, such as TLS (Transport Layer Security) and IPsec (Internet Protocol Security), face the risk of becoming obsolete. This vulnerability poses a significant challenge for 5G and 6G mobile networks, which rely on these protocols for data transmission. This survey explores the potential of Post-Quantum Cryptography (PQC) algorithms as viable alternatives for securing mobile communications. Through a comprehensive review of NIST-shortlisted PQC algorithms, this paper examines their relevance, efficiency, and adaptability in 5G and 6G architectures. Case studies, including real-world implementations by Amazon Web Services (AWS) and IBM, illustrate the growing acceptance and practical applicability of these quantum-resistant algorithms.
The paper proposes strategic steps that organizations can take to future-proof their security architecture against quantum threats for the security of data integrity and confidentiality in the post-quantum era. it is a very threat that quantum computing is advancing too fast, and the classical cryptographic systems will be in danger. Therefore, we need to modify the methods of cryptography in Quantum-Safe Cryptography. In this paper, we focus on exposing the vulnerabilities of existing public-key cryptosystems faced with quantum attacks and the direction of the post-quantum cryptographic (PQC) algorithm in securing the underlain infrastructure. The paper discusses ongoing efforts to standardize cryptosystems led by the National Institute of Standards and Technology (NIST). It overviews several quantum-resistant cryptographic techniques: lattice-based, hash-based, and code-based examples. Moreover, the paper also outlines difficulties in implementing quantum-safe cryptography solutions into currently in-place cybersecurity frameworks, especially in the finance, healthcare, and critical infrastructure industries.
Quantum computing is a rapidly developing field with the potential to revolutionize many industries. However, it also poses a serious threat to the security of future networks as current communications rely on encryption to protect data from unauthorized access, which could be broken by quantum computers in the future. This means that they could be used to attack future networks like Beyond 5G (B5G) and Sixth Generation (6G) which are expected to be much more widely used than previous generations of networks. There are a number of things that can be done to mitigate the quantum threat to future networks. One approach is to develop new encryption algorithms, Post-Quantum Cryptography (PQC), that are resistant to quantum computers. Another approach is to use Quantum Key Distribution (QKD) to create secure keys that cannot be broken by quantum computers. This work examines the current state of quantum and post-quantum cryptography and their applications in upcoming generations of wireless networks such as 6G, and the challenges that might arise for their implementation. Additionally, a new isogeny-based post-quantum cryptographic scheme is presented. This paper aims to advance and contribute to the research and development of quantum security in future networks.