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Bitcoin Safe for Now Against Quantum Threats, Experts Say

11/19/2025

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Summary

Story summary

Bitcoin faces no immediate threat from quantum computing, with a 20–40 year timeline, per Adam Back, CEO of Blockstream.
Quantum computers today cannot break Bitcoin's SHA-256 encryption, which would require about 8,000 logical qubits.
Post-quantum cryptography is already being developed and could be integrated before a real threat emerges.
Experts warn of a "harvest now, decrypt later" approach, storing encrypted data for future decryption.

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Story summary

Bitcoin faces no immediate threat from quantum computing, with a 20–40 year timeline, per Adam Back, CEO of Blockstream.
Quantum computers today cannot break Bitcoin's SHA-256 encryption, which would require about 8,000 logical qubits.
Post-quantum cryptography is already being developed and could be integrated before a real threat emerges.
Experts warn of a "harvest now, decrypt later" approach, storing encrypted data for future decryption.