PQC concepts
What is CRQC?
Also known as Cryptographically Relevant Quantum Computer.
A quantum computer capable of breaking RSA-2048 or equivalent classical cryptography. No authoritative arrival date exists. NIST transition guidance removes quantum-vulnerable algorithms by 2035, with high-risk systems moving earlier.
Decision context
Why CRQC matters
A cryptographically relevant quantum computer is a risk-planning threshold, not a reliable calendar date. Migration timing depends on data confidentiality horizon, system replacement cycles, supplier readiness, regulatory milestones and the time required to discover and replace vulnerable cryptography across a real estate.
How to evaluate CRQC
Use scenario ranges rather than one asserted Q-Day. For each asset, compare required protection lifetime plus migration duration against the earliest credible threat window. Record assumptions, owners and review dates so the roadmap changes when evidence changes instead of relying on an undated prediction.
PQC concepts
PQC concepts evidence boundary
Post-quantum programmes combine cryptography, architecture, data lifetime, operational ownership, and migration governance. A concept is useful only when it changes a concrete inventory, policy, design, test, or evidence decision. Treat terminology as a decision aid rather than proof that a control exists.
FAQ
Common questions
What is CRQC?
A quantum computer capable of breaking RSA-2048 or equivalent classical cryptography. No authoritative arrival date exists. NIST transition guidance removes quantum-vulnerable algorithms by 2035, with high-risk systems moving earlier.
Why does CRQC matter?
A cryptographically relevant quantum computer is a risk-planning threshold, not a reliable calendar date. Migration timing depends on data confidentiality horizon, system replacement cycles, supplier readiness, regulatory milestones and the time required to discover and replace vulnerable cryptography across a real estate.
How should CRQC be evaluated?
Use scenario ranges rather than one asserted Q-Day. For each asset, compare required protection lifetime plus migration duration against the earliest credible threat window. Record assumptions, owners and review dates so the roadmap changes when evidence changes instead of relying on an undated prediction.
What is CRQC also known as?
CRQC is also known as Cryptographically Relevant Quantum Computer. A quantum computer capable of breaking RSA-2048 or equivalent classical cryptography. No authoritative arrival date exists. NIST transition guidance removes quantum-vulnerable algorithms by 2035, with high-risk systems moving earlier.
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