Google Quantum Crypto Paper (2026)
eventAI & Compute · Crypto & Digital ID · Defense & Military-Industrial
A 2026 paper showed the code protecting all Bitcoin could be cracked far sooner than anyone expected.
Who they are
A March 2026 research paper from Google Quantum AI, the Ethereum Foundation, and Stanford.
What they do
It proved a quantum computer could break the encryption behind Bitcoin and Ethereum using far fewer resources than previously believed.
How it works
It showed the crack needs under about 1,450 logical qubits (roughly 20 times fewer than prior estimates), that a live theft could happen in 9-12 minutes (faster than Bitcoin's 10-minute block time), and that 1.7-6.9 million BTC sit in exposed older wallets; the details were disclosed carefully so the actual attack recipe wasn't published.
Why it matters
It moved up the real-world deadline for 'quantum-safe' security (Google sped its own migration to 2029) and showed digital money is the first thing at risk when quantum computers mature.
The engine's record — word for word
March 31, 2026. Google Quantum AI + Ethereum Foundation + Stanford. Proved Shor's algorithm breaks secp256k1 (Bitcoin/Ethereum) with <1,200 logical qubits, <500K physical qubits — 20x fewer than prior estimates. 'On-spend' attacks possible in 9-12 minutes (faster than BTC's 10-min block time). Google accelerated internal PQC migration to 2029. 1.7-6.9M BTC in exposed legacy P2PK wallets. [Q-Day report] Google Quantum AI resource estimate: secp256k1 (Bitcoin's curve) breakable with <=1,450 logical qubits + <=70M Toffoli gates — ECC falls BEFORE RSA-2048, prioritizing the threat to digital assets. Vulnerability disclosed responsibly via a zero-knowledge proof (substantiates the estimate without publishing the weaponizable circuit) — a temporary operational shield.
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