G7: Urges immediate migration to post-quantum cryptography, Bitcoin, Ethereum, and Solana developers have tested defense solutions

The G7 Cybersecurity Working Group stated in its latest report that quantum computing poses security threats to both public and private institutions, as well as economic threats, and relevant organizations should begin migrating to post-quantum cryptography (PQC) immediately. The working group noted that the migration process could take several years, and attackers can currently collect and store encrypted data to decrypt it once sufficiently powerful quantum computers become available.

Quantum computing may also break digital signatures, leading to identity theft and exposing businesses and their supply chains. The report did not mention cryptocurrencies, but similar public key cryptography is used for blockchain wallets and transaction authorizations. Currently, quantum computers are unable to break Bitcoin's cryptography, but developers are considering post-quantum solutions such as BIP-360. Ethereum researchers plan to replace several cryptographic components used by accounts, validators, and applications. The Solana Foundation has tested post-quantum signatures on its testnet and launched an optional hash-based vault. The G7 working group also urged governments to support relevant research, public-private collaboration, and national PQC strategies.