Bitcoin Developer Floats ‘Quantum Landmines’ to Trap Future BTC Thieves

Bitcoin Core developer Cory Fields has proposed "quantum landmines"—secretly embedded traps in bitcoin outputs that let holders reclaim stolen coins and seize an attacker's collateral if a quantum computer attempts a theft. The scheme targets Bitcoin's long-anticipated quantum vulnerability, where a sufficiently powerful machine could derive private keys from exposed public keys and drain wallets. Under the design, coins would be moved into outputs whose spending conditions are hidden, so an attacker who cracks the visible key and broadcasts a transaction could be preempted by the true owner, who also confiscates collateral the attacker must post. The proposal remains conceptual and would require consensus-level changes, with no timeline or activation plan yet specified. Developers and wallet providers will now weigh whether the added complexity and collateral requirements are worth the protection ahead of any credible quantum breakthrough.