What is quantum-safe networking?
Protecting data for the quantum era
Quantum-safe networking refers to the use of cryptographic and networking technologies designed to protect data against future threats from quantum computers. Today’s digital communications often rely on public-key encryption methods that sufficiently powerful quantum computers could eventually break. This creates a risk for sensitive information with long-term value, as attackers may capture encrypted traffic now and decrypt it later. Quantum-safe networking addresses this harvest-now, decrypt-later threat by using security approaches designed to protect data in motion across distributed networks, cloud environments and critical infrastructure.
Preventing harvest-now, decrypt-later attacks
Protecting sensitive data today helps prevent it from being exposed by future quantum-enabled decryption.
Strong encryption for data in transit is essential as security standards evolve for the post-quantum era.
Beyond traditional network security
Extending protection beyond applications and protocols enables data to be secured consistently across network layers.
How quantum-safe networking works
Quantum-safe networking can combine several security approaches. Post-quantum cryptography (PQC) replaces public-key algorithms vulnerable to quantum attacks with mathematical methods that can resist them. Quantum key distribution (QKD) uses the properties of quantum physics to support secure key exchange over optical networks. Hybrid models can combine established encryption with PQC, QKD or both, giving organizations a practical path to stronger protection during the transition to post-quantum security. The goal is to make networks crypto-agile, so security mechanisms can evolve as standards, threats and compliance requirements change.
Securing data in motion
Reliable protection across optical, Ethernet, cloud and data center environments helps ensure consistent security for critical services.
What quantum-safe networking needs to work
Implementing quantum-safe networking requires more than updating encryption algorithms. Organizations need infrastructure that can support secure key exchange, high-performance encryption, crypto-agility and visibility across distributed environments. For sensitive and regulated networks, protection may need to extend across Layer 1 optical transport and Layer 2 Ethernet services, helping secure both payloads and operational traffic. Adtran and Adva Network Security help address these challenges with ConnectGuard™ security, high-capacity optical transport and intelligent network management, enabling quantum-safe protection of data in motion from the core to the edge.
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