A viral claim circulating online says Google research shows a quantum computer can crack Bitcoin private keys in just 9 minutes – faster than a block is mined. BlockTempo conducted six rounds of cross-verification and found zero support from Google's official blog, arxiv, Nature, Science, or any major crypto media outlet. The conclusion: it's a fabricated narrative.
The 9-Minute Fabrication: Two Real Events Conflated
First, in December 2024 Google unveiled its Willow quantum chip, which completed a random circuit sampling (RCS) benchmark in 5 minutes that would take a classical supercomputer 10²⁵ years. But RCS is a specific algorithm unrelated to cryptography. Second, Bitcoin mines a block every 10 minutes on average, creating a theoretical 'mempool attack' window. Fabricators likely combined 5 minutes from RCS with 10 minutes from block time to get 9 minutes, then leveraged Google's 2029 PQC migration plan to create urgency.
Google's Actual Stance: At Least 10 Years Away
On March 28, 2026, Google announced it would complete its post-quantum cryptography (PQC) migration by 2029, six years ahead of the U.S. federal government's 2035 target. A Google spokesperson explicitly stated that quantum computers are at least 10 years away from cracking RSA-2048. That's a full generation gap from '9 minutes.'
The Numbers: An Astronomical Gap
To crack ECDSA offline within one day requires 13 million physical qubits. Willow has 105 — a factor of 124,000 times less. For a real-time mempool attack within 10 minutes, the requirement jumps to 1.9 billion physical qubits, over 18 million times Willow's current qubits. Even logical qubit requirements (2,330–2,619) demand thousands of physical qubits each for error correction. Willow's 105 translates to less than a single logical qubit. Tether CEO Paolo Ardoino put it bluntly: quantum computing is still far from cracking Bitcoin encryption.
The Real Short-Term Risk: Harvest Now, Decrypt Later
Attackers cannot break Bitcoin today, but they can collect encrypted data now for future decryption. On-chain public key data is public and permanent. Approximately 6.8 million BTC (~$470 billion) sits in quantum-vulnerable addresses: P2PK format (used early Bitcoin, including most of Satoshi's ~1 million BTC) and reused P2PKH addresses (keys exposed through spending). Addresses that have never spent (public key not revealed) are safer, as SHA-256 is resistant to quantum attacks. Most experts push Q-Day to 2035–2040; Google says at least 10 years.
Industry Defenses Are Underway
BIP 360 introduced quantum-resistant output types. BTQ Technologies launched the Bitcoin Quantum testnet. NIST standardized ML-DSA, which Google integrated into Android 17. Trezor released the Safe 7 hardware wallet with quantum-resistant architecture. CoinShares Research calls the threat a 'manageable risk.' Panic is not preparation. Willow's 105 qubits to 1.9 billion is decades of engineering away.