Google Warns Quantum Computing Could Break Crypto Security Sooner Than Expected

Google has issued a warning that progress in quantum computing could undermine the cryptographic foundations securing blockchain networks and digital assets sooner than the industry has planned for, according to a report shared by @MyriadMarkets on March 31, 2026.

Analysts cited in the report are urging the crypto industry to act with 'appropriate urgency' in preparing post-quantum cryptographic defenses, suggesting the timeline for quantum threats to become practical may be shorter than previously modeled.

Why This Matters for Crypto

Most public blockchain networks — including Bitcoin and Ethereum — rely on elliptic curve cryptography (ECC) for wallet security and transaction signing. Sufficiently advanced quantum computers running algorithms such as Shor's algorithm could theoretically break ECC, exposing private keys and compromising wallet security at scale.

The warning comes as major technology firms, including Google, continue to report rapid iteration in quantum hardware capabilities. Google's quantum computing division has previously marked significant milestones, including its 2024 Willow chip announcement, which demonstrated substantial gains in error correction.

The National Institute of Standards and Technology (NIST) finalized its first set of post-quantum cryptographic standards in 2024, though adoption across blockchain protocols remains limited.

No specific timeline for a viable cryptographic attack was provided in the report. Blockchain projects and infrastructure providers are expected to watch for further guidance on post-quantum migration strategies.