The European Union’s three financial supervisors added quantum computing to their autumn 2026 risk assessment on September 23. The warning covers cryptography that protects communications, transactions, databases and blockchains. It does not point to an imminent attack. Instead, it raises expectations for how financial providers prepare for future cryptographic threats.

The European Banking Authority, European Insurance and Occupational Pensions Authority, and European Securities and Markets Authority issued the assessment through their Joint Committee. Its core findings had already reached the EU Economic and Financial Committee’s Financial Stability Table on September 10.

The update places quantum computing beside two other major areas of concern. Those include reliance on providers and infrastructure outside the EU and rapid growth in private credit markets.

The supervisors said quantum computing could transform several parts of finance. Potential applications include process optimization, fraud detection, compliance monitoring, pricing, and financial simulations.

Yet the same technology could weaken cryptographic systems that institutions use at scale. Those systems protect financial communications, transactions, and databases. The assessment also names blockchains directly among the technologies exposed to future cryptographic disruption.

The timing of that threat forms a central part of the warning. According to the assessment, quantum risks could emerge before commercially viable quantum applications become widely available. That creates a security challenge before many firms gain practical economic benefits from the technology.

The concern extends beyond data generated in the future. Attackers can collect encrypted information now and attempt to decode it years later when stronger computers become available.

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