Bitcoin Developer Proposes a Quantum Trap for Hackers

Bitcoin Core developer Cory Fields has proposed a “quantum trap” mechanism to deter theft of coins vulnerable to future quantum computers, first outlined on November 4. The idea is to make stealing vulnerable Bitcoin a costly gamble by forcing attackers to pay a penalty, potentially turning a hack into a net gain for the victim. The proposal comes as Bitcoin prepares for “Q-Day,” when sufficiently powerful quantum machines could break the network’s existing elliptic-curve cryptography and expose coins whose public keys are already revealed. The design targets the roughly 4 million BTC estimated to sit in exposed or reused-key addresses, though Fields’ proposal is a conceptual framework rather than an activated protocol change. What to watch next is whether the idea gains traction among Bitcoin Core contributors and how it might complement other post-quantum migration proposals, such as BIP 360, in securing dormant and exposed holdings.