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G7 Warns Quantum Threat Demands Action as Crypto Industry Weighs Fixes
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- DeepHorus
The Group of Seven (G7) has issued an urgent call for governments and businesses to begin migrating to post-quantum cryptography (PQC) immediately. In a report from its cybersecurity working group, the forumâcomprising Canada, France, Germany, Italy, Japan, the United Kingdom, and the United Statesâwarned that quantum computing poses a significant security and economic threat. The group stressed that while the exact timeline for a cryptographically relevant quantum computer is uncertain, recent advances suggest the threat is materializing.
The core risk is "harvest now, decrypt later." Attackers can collect encrypted data today, including sensitive government and corporate secrets, and store it until a sufficiently powerful quantum computer emerges. This technology would be capable of breaking widely used public-key cryptography mechanisms. Such a breach would compromise digital signatures, enable impersonation, and expose entire supply chains.
The G7 emphasized that the transition to quantum-resistant standards is a collective challenge requiring coordinated planning across public and private sectors. It advised organizations to identify critical systems and adopt quantum-safe products during scheduled upgrades to manage costs effectively. Furthermore, governments were urged to support research, foster partnerships, and integrate quantum security into procurement requirements.
While the G7 report does not explicitly mention cryptocurrency, the same public-key cryptography protects blockchain networks. Bitcoin, Ethereum, and Solana developers are already testing defenses. Bitcoin is considering proposals like BIP-360 for new signature schemes, though its governance model makes such changes complex.
Ethereum researchers are planning to rebuild components, such as the deposit contract, to support larger post-quantum keys. Solana may have a simpler migration path due to its use of EdDSA signatures, with the Solana Foundation having already tested post-quantum alternatives on a test network.
The overarching message is one of proactive collaboration. "To strengthen collective resilience... public and private organizations must jointly act now," the G7 stated. This transition is framed as the foundational step toward a secure and resilient digital future.
