G7 Warns Quantum Computing Threatens Global Encryption Standards

The G7 group of nations has issued a formal warning regarding the existential threat quantum computing poses to current encryption and digital signature standards. The alliance is urging organizations, particularly those within the financial and digital asset sectors, to accelerate their transition to post-quantum cryptography (PQC) to safeguard global data integrity.

According to reports from Decrypt and Quantum Zeitgeist, the G7 is coordinating a push to replace vulnerable asymmetric encryption systems, such as RSA and ECC. France's National Cybersecurity Agency (ANSSI) is leading these efforts during France's 2026 G7 Presidency, expanding upon the foundations established during Canada's 2025 leadership. The goal is to broaden international collaboration to ensure that critical infrastructure is updated before quantum capabilities reach a critical threshold.

The Quantum Vulnerability

Modern digital security relies heavily on mathematical problems that are nearly impossible for classical computers to solve but can be efficiently broken by Shor's algorithm once a sufficiently powerful quantum computer exists. This vulnerability has given rise to the "Harvest Now, Decrypt Later" (HNDL) threat. In this scenario, adversaries collect and store encrypted sensitive data today, intending to decrypt it once quantum technology matures.

To counter this, the National Institute of Standards and Technology (NIST) is leading the global effort to standardize PQC algorithms. These new standards are designed to be resistant to both classical and quantum attacks, providing a necessary replacement for the systems that currently secure the majority of the world's internet traffic and financial transactions.

Systemic Risks to Digital Trust

If the migration to PQC is not completed before a cryptographically relevant quantum computer (CRQC) is developed, the foundation of digital trust could be compromised. This risk extends across government communications, global banking systems, and the cryptocurrency ecosystem.

For the crypto industry, the threat is particularly acute. Many digital asset wallets use old address formats that are highly vulnerable to quantum attacks. Because these assets often sit dormant, they represent a significant target for future theft. The industry is currently evaluating various mitigation strategies, including the implementation of hybrid security models and comprehensive protocol upgrades to protect assets from future quantum-enabled breaches.

The Path Forward

As the G7 pushes for faster adoption, the focus remains on the operationalization of NIST's standards. Organizations are being encouraged to audit their current encryption dependencies and create migration roadmaps to avoid a last-minute scramble. While the exact timeline for the arrival of a CRQC remains a subject of theoretical debate among researchers, the G7's insistence on immediate action suggests that the window for a safe transition is closing faster than previously anticipated.