On September 3, 2026, the G7 Cybersecurity Working Group released a joint call urging public- and private-sector organizations to begin transitioning from quantum-vulnerable public-key cryptography to post-quantum cryptography now. The Canadian Centre for Cyber Security’s September 3 notice says the arrival date of a cryptographically relevant quantum computer remains uncertain, but preparation should not wait.

The September 3 call does not demand an immediate, organization-wide algorithm replacement. It sets out a phased, risk-based opening sequence: inventory cryptographic assets, identify critical systems, map dependencies and develop transition plans. That sequence makes discovery and prioritization the work to begin now, while…