The Group of Seven’s cybersecurity working group issued a blunt warning on September 3, 2026: organizations around the world should begin migrating to post-quantum cryptography immediately, before quantum computers become capable of dismantling the encryption that currently secures digital infrastructure. The advisory carries particular urgency for the cryptocurrency industry, where public-key cryptography underpins everything from wallet security to transaction authorization, and where upgrading core protocols requires coordination across developers, miners, exchanges and millions of users.

The working group’s report, titled “Preparing for the Post-Quantum Era: A Call to Action,” frames quantum computing as a security and economic…