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Post-quantum cryptography transition depends on third-party vendors. Are yours ready?

Agencies released joint guidance helping organizations assess third-party vendor readiness for transitioning to post-quantum cryptography before future quantum threats emerge.

Post-quantum cryptography transition depends on third-party vendors. Are yours ready?. Source: CISA

CISA, the National Security Agency, and the Australian Cyber Security Centre released joint guidance on November 5, 2026. The publication aims to help organizations evaluate vendor readiness for transitioning to post-quantum cryptography.

Assessing Vendor Readiness

CISA, the Australian Signals Directorate's Australian Cyber Security Centre, and the National Security Agency released joint guidance and a quick-reference list on November 5, 2026. The publication is designed to help organizations evaluate vendor readiness for transitioning to post-quantum cryptography.

As quantum computing advances, widely used public-key cryptography will face vulnerabilities from cryptographically relevant quantum computers. Organizations must plan for and transition to PQC before these threats materialize.

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Supply Chain Dependencies

Many organizations depend on third-party vendors for cloud capabilities, managed services, and other cryptography-dependent products. Additionally, industrial control systems and Internet of Things devices have long asset lifecycles and require vendor support to update.

Organizations can use the vendor-neutral questions outlined in the guidance to determine whether vendors understand quantum risks and support a timely PQC transition.

What to do

  • Use the vendor-neutral questions outlined in the guidance to determine whether a vendor understands quantum-related risks, maintains transparency over its cryptographic implementations, and supports a secure, cost-effective and timely transition to PQC.
Key facts and where they come from
  • CISA, ASD's ACSC, and the NSA released joint guidance to help organizations assess vendor readiness for transitioning to post-quantum cryptography.
    released joint guidance and an accompanying quick-reference list to help organizations assess vendor readiness for transitioning to post-quantum cryptography (PQC).
  • Widely used public-key cryptography will become vulnerable to compromise from cryptographically relevant quantum computers as quantum computing advances.
    As quantum computing advances, widely used public-key cryptography will become vulnerable to compromise from cryptographically relevant quantum computers (CRQCs).
  • Many organizations rely on third-party vendors for managed services, cloud capabilities, and cryptography-dependent products.
    Many organizations rely on third-party vendors for managed services, cloud capabilities, and other cryptography-dependent products and services.

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