Bitcoin Quantum Debate Pits Back Against Ben-Sasson

TLDR StarkWare CEO Eli Ben-Sasson warned that Bitcoin needs stronger security against future quantum attacks. Blockstream co-founder Adam Back rejected predictions that quantum computing would inevitably cause Bitcoin to collapse. Quantum computers running Shor’s algorithm could theoretically break Bitcoin’s current digital signatures. Bitcoin’s SHA-256 hashing faces a different and more limited threat from known quantum algorithms. Blockstream demonstrated quantum-resistant SHRINCS signatures on the Liquid sidechain in March 2026. Bitcoin Quantum security has become a renewed point of debate after StarkWare chief executive Eli Ben-Sasson warned that future quantum computers could threaten Bitcoin. Blockstream co-founder Adam Back challenged his forecast, pointing to work on new ways to protect the network and its users.

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