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Post-Quantum Cryptography

Quantum-Safe Computing

As quantum computing advances and estimated timelines evolve, the time to prepare is now. Discover how Cisco’s two-pillar strategy helps secure your communications and hardware while supporting a measured transition to mitigate 'Harvest Now, Decrypt Later' risks.

The Quantum Threat: Why Action is Needed Now

We are entering a new era of digital trust where the encryption securing our world today must evolve to withstand the quantum computers of tomorrow. Two leading threats are at the forefront:

  • Harvest Now, Decrypt Later (HNDL): Attackers are capturing encrypted data now, aiming to decrypt it later when quantum computers are ready.
  • Trust Now, Forge Later (TNFL): Digital signatures that are trusted and verified today could be retroactively forged once quantum computers become powerful enough

To protect the integrity of global communications, Cisco is advancing a practical transition to Post-Quantum Cryptography (PQC). We are embedding quantum-safe resilience into the very fabric of our products to ensure your data remains secure for the long term.

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Our Strategic Approach

Cisco delivers end-to-end quantum resilience from the silicon to the cloud:

  • Secure Communications: Integrating PQC into core protocols (IPsec, TLS, MACsec) to protect data in transit. 

  • Secure Products: Embedding quantum-resistant trust foundations into Cisco platforms, anchored in a hardware root of trust that protects key material and enables PQC-based identity, secure boot, signing and verification, update integrity, and remote attestation – so customers can continuously validate device authenticity and software integrity.

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Getting Started on Your Post-Quantum Cryptography Journey

Preparing for quantum safety starts with understanding where quantum risk exists today. Cisco helps organizations build awareness of the quantum threat, assess cryptographic exposure across systems and data flows, and prioritize sensitive data requiring long-term protection. This foundation supports informed planning for cryptographic agility, supplier readiness, and phased PQC adoption as standards mature, so customers can begin a structured, ongoing transition with clarity and confidence.

Get the PQC transition guide (PDF)

Featured resource

Safeguard Your Network in a Post-Quantum World Webinar

Securing your network against quantum threats can start today. Cisco already provides quantum-safe solutions to protect your transport protocols from 'Harvest Now, Decrypt Later' risks. Watch this webinar to learn how to implement these protections now and discover Cisco’s roadmap for a quantum-resistant future.

Post-Quantum Cryptography resources

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Understanding the Quantum Threat to Network Security

Discover how Cryptographically Relevant Quantum Computers (CRQCs) pose a threat to privacy and secrecy by compromising encryption.

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Cisco’s Vision for Post-Quantum Cryptography: A Secure Future

Read how Cisco is leading the transition to quantum-safe cryptography with a standards-based approach for a quantum-resilient future.

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Quantum Key Distribution and the Path to Post-Quantum Computing

Learn what's available today for quantum-safe solutions, along with the viability of QKD, an emerging tech that spans the gap between the present and future.

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The Impacts of Government Regulations on Post-Quantum Cryptography Product Availability

Learn how Cisco is working to meet current critical deadlines with products that are designed to enable PQC in the future.

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Post-Quantum Cryptography: What’s Coming Next

Explore what it will take to operationalize the new NIST post-quantum cryptographic standards.

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Safeguard Your Network in a Post-Quantum World

Cisco is leading the way with comprehensive and innovative quantum-safe cryptography solutions that are ready to deploy today. Read more.

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Quantum Security and Networking are Emerging as Lifelines in Our Quantum-powered Future

A metamorphosis continues to take shape with the rise of Post-Quantum Cryptography, Quantum Key Distribution, and Quantum Networking. Learn more.

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The Countdown Has Begun: Getting Started on your Post-Quantum Journey

With NIST's post-quantum cryptography standard released, organizations must start preparing to secure essential data against post-quantum threats. Start today!

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Resources

Transitioning to Post Quantum Security

Read how to quickly get started on transitioning to post-quantum security.

Read At-a-Glance (PDF)

Demystifying the Quantum Threat for Network Operators

Learn about the impact of quantum computing on cryptography and how it impacts network security.

Watch webinar

Post-Quantum Trust Anchors: Security and Trust in a post-quantum computing world

Explore the potential threats posed by the emergence of large-scale quantum computers to current cryptography standards.

Read white paper (PDF)

Securing networks in the quantum compute era

Quantum computing's rapid advance poses significant threats to current cryptographic methods. Learn how Cisco is pioneering a comprehensive approach that embeds quantum-resistant technologies deep into the layers of networking to protect sensitive data and communications now and in the future.

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Cryptography in a Post-Quantum World

Quantum computing poses a significant risk to current encryption methods. This paper will help you to better understand and navigate the process as you prepare for post-quantum cryptography, with an emphasis on network infrastructure.

Download overview (PDF)