By Viet Nguyen, President, 5G Americas – February 2025
Picture a future where your smartphone’s connection isn’t just faster – it’s protected against virtually all known cyberthreats. This is the promise of quantum computing in wireless networks, and it’s not as far-fetched as it sounds – but it does come with challenges, as both networks and intruders enter the race for security in the quantum era. In our latest white paper, “Post Quantum Computing Security” 5G Americas explores how the potential of quantum technology unlocks new capabilities but also threatens to undermine the security infrastructure that protects mobile networks and the broader internet.
At its heart, quantum computing introduces an ingenious security system called quantum key distribution (QKD). Think of it as a lock that changes the moment anyone tries to peek at it. Unlike today’s encryption methods, which could potentially be cracked by powerful enough computers, QKD creates security backed by the fundamental laws of physics themselves.
But security is just the beginning. Imagine your data taking the perfect path through the network, like water naturally finding the fastest route downhill. Quantum algorithms make this possible by calculating countless routing possibilities simultaneously, slashing network congestion and latency. This is especially crucial as we move toward 6G networks, which will handle an almost unimaginable amount of data.
The real magic happens in how quantum computers process all this information. They can analyze network traffic patterns and make split-second decisions, much like having a traffic controller with superhuman abilities managing every data packet. The result? A wireless network that’s not just faster and more secure, but smarter and more responsive than anything we’ve seen before.
Quantum computing offers transformative benefits for wireless networks by enhancing security, efficiency, and performance. In addition to quantum key distribution (QKD), quantum algorithms can optimize network routing, reducing latency and improving bandwidth allocation, which is crucial for handling the massive data demands of future networks like 6G. Additionally, quantum computing accelerates data processing and real-time analytics, enabling faster decision-making and improved traffic management in wireless systems. These advancements collectively promise more secure, efficient, and robust wireless networks.
However, as cryptographically relevant quantum computers (CRQCs) advance, they could render current encryption methods obsolete, putting sensitive data at risk. Addressing this threat requires the adoption of post-quantum cryptography (PQC) and a proactive migration strategy to safeguard wireless networks. At the core of modern wireless security is public key cryptography, which relies on mathematical problems that are computationally infeasible for classical computers to solve. Algorithms such as RSA, Elliptic Curve Cryptography (ECC), and Diffie-Hellman provide the foundation for securing network connections, encrypting subscriber identity, and authenticating communications. However, Shor’s Algorithm, which runs efficiently on a quantum computer, can break these cryptographic schemes, making them ineffective against quantum-enabled adversaries.
One of the most pressing concerns is the “harvest now, decrypt later” attack, where malicious actors intercept and store encrypted data today with the intent to decrypt it once quantum capabilities are mature enough. This means that even though CRQCs are not yet available, sensitive information transmitted today is already at risk.
Recognizing the urgency of the quantum threat, the U.S. National Institute of Standards and Technology (NIST) initiated a global effort to standardize PQC algorithms. In 2024, NIST finalized three post-quantum cryptographic standards:
- Module-Lattice-Based Key-Encapsulation Mechanism (ML-KEM) for secure key exchange
- Module-Lattice-Based Digital Signature Algorithm (ML-DSA) for authentication
- Stateless Hash-Based Digital Signature Algorithm (SLH-DSA) for digital signatures
These algorithms are designed to resist attacks from both classical and quantum computers, ensuring long-term security for digital communications. However, the transition to PQC is not a straightforward process and requires careful planning to integrate these new cryptographic methods into existing network architectures. Indeed, multiple standards development organizations are coalescing around the development of quantum resistant cryptography and standards.
Given the complexity of upgrading security protocols across global wireless networks, a hybrid migration approach is gaining traction. Hybrid mechanisms combine traditional cryptography with PQC, ensuring that if one method is compromised, the other remains intact. The Internet Engineering Task Force (IETF) and the Third Generation Partnership Project (3GPP) are actively working to define hybrid key exchange protocols and update security standards such as Transport Layer Security (TLS) and Internet Protocol Security (IPSec).
Additionally, the telecommunications industry must assess cryptographic inventories throughout their networks, identify high-risk assets, and engage with vendors to align on migration plans. Establishing a quantum-readiness roadmap is essential to mitigating risks associated with CRQC advancements.
The successful implementation of post-quantum security will require cross-industry collaboration. Organizations such as the GSMA’s Post-Quantum Telco Network Taskforce are working to provide policy guidance, risk assessment frameworks, and best practices for migration. At the same time, standards bodies like IETF are developing PQC-ready security protocols, while 3GPP is integrating these protocols into mobile systems to protect user identity and network communications. These efforts ensure that the transition to quantum-resistant networks is both coordinated and effective.
While PQC algorithms offer increased security, they also present performance and implementation challenges. Compared to traditional cryptographic methods, PQC often requires larger key sizes and higher computational resources, which may impact network efficiency and device performance. Upgrading legacy systems to support PQC while maintaining backward compatibility with existing infrastructure is a critical challenge that must be addressed through rigorous testing and phased deployment.
For instance, many mobile networks still rely on older versions of security protocols, such as TLS (Transport Layer Security) 1.2, which do not support PQC. Transitioning to TLS 1.3 or later versions is necessary to enable PQC integration. Similarly, network hardware, including hardware security modules (HSMs), will require updates to accommodate the new cryptographic standards.
To prepare for the quantum era, the telecommunications industry must take proactive steps, including:
- Educating executives and stakeholders about quantum risks and security implications.
- Developing a cryptographic inventory to assess vulnerabilities in current network infrastructure.
- Engaging with vendors to align on quantum security roadmaps and ensure supply chain readiness.
- Investing in cryptographic agility to support seamless transitions between cryptographic methods.
- Participating in industry working groups to stay informed on quantum security developments.
While the timeline for CRQC development remains uncertain, early preparation is essential to ensure that wireless networks remain secure in a post-quantum world. The telecommunications industry has an opportunity to stay ahead of quantum threats by investing in PQC today and adopting a phased migration strategy that balances security with operational efficiency.
By embracing a proactive approach, wireless providers can maintain trust, protect critical communications, and ensure the long-term resilience of mobile networks in the quantum age.
