Cryptographically relevant quantum computer (CRQC)
A quantum computer large and reliable enough to break the public-key cryptography currently protecting most internet traffic.
A cryptographically relevant quantum computer is one capable of running Shor's algorithm at the scale needed to recover keys from the public-key schemes in general use - RSA and elliptic-curve cryptography. It is a threshold defined by a capability rather than by a design, and reaching it requires sustaining a large number of logical qubits through a very long sequence of operations.
No such machine is known to exist, and published resource estimates for one have moved substantially in both directions as error-correction techniques and algorithms have improved. That volatility is the point: an organisation planning around a specific year is planning around a number that has repeatedly been revised.
Which is why the migration decision does not actually depend on the date. Under harvest now, decrypt later, traffic recorded today is exposed whenever the threshold is crossed, so the binding question is how long your data must stay confidential - and for most commercially sensitive material that horizon exceeds any credible estimate.
Evidence that keeps pace with the decision.
Evaluate Nuclir against the systems, markets, and decisions that matter to your organization. The result is current intelligence with the context needed to use it responsibly.