Time is Running Out for Bitcoin to Mitigate Quantum Computing Threat, Putting 6.9 Million BTC at Risk

While not all aspects of bitcoin are vulnerable to quantum computers, the ownership of coins is at significant risk. Bitcoin wallets rely on a specific type of mathematics that can be compromised by quantum computers, potentially allowing attackers to spend coins without permission. Approximately 6.9 million bitcoin, including those owned by the cryptocurrency's creator Satoshi Nakamoto, are exposed due to their public keys being visible on the blockchain. A quantum attacker could target these wallets at their own pace, without needing to rush against ongoing transactions. The recent Taproot upgrade has inadvertently increased the problem by publishing the keys of spent bitcoin, making them more susceptible to quantum attacks. Unlike Ethereum, which has a formal quantum-resistant program in place, bitcoin currently lacks a concrete strategy to address this issue. Several proposals, including BIP-360 and a detection system from BitMEX Research, have been put forth but lack broad support from core developers. The lack of a centralized authority and governance process in bitcoin makes implementing effective solutions challenging. The coordination problem lies in making decisions that the network has historically avoided, such as freezing old address formats or allowing exposed coins to migrate to new quantum-safe addresses. With the quantum threat looming, developers face the question of whether bitcoin can coordinate a significant security upgrade before it's too late.