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Bitcoin developer proposes "quantum landmines" to deter future quantum attacks
Longtime Bitcoin Core developer Cory Fields outlined three experimental mechanisms to discourage quantum-enabled theft in a Nov. 4, 2026 Bitcoin Development Mailing List post. The proposals, described as thought experiments, include a "Quantum Landmines" scheme that could let a victim reclaim stolen coins and seize an attacker’s collateral. Fields, also linked to MIT’s Digital Currency Initiative, noted the ideas might be implemented via a soft fork but are not yet active. Project Eleven estimates about 6.9 million BTC have publicly exposed keys, though no quantum computer can currently perform such an attack.