Bitcoin Faces Quantum Computing Threat: Time Running Out to Protect 6.9 Million Coins

While not all aspects of bitcoin are vulnerable to quantum computer attacks, the ownership of coins is at significant risk. Bitcoin wallets rely on a specific type of mathematics that can be broken by quantum computers, potentially allowing attackers to spend coins without authorization. Approximately 6.9 million bitcoins, including those owned by the cryptocurrency's pseudonymous creator Satoshi Nakamoto, are exposed due to their public keys being visible on the blockchain. A quantum algorithm known as Shor's can collapse the time it takes to break this math, and recent research suggests this could be achieved with fewer resources than previously thought. The bitcoin network must now consider how to respond to this threat, including the potential for a major security upgrade. However, the network's lack of formal governance and resistance to coordinated change may hinder the implementation of effective solutions. Ethereum, another major cryptocurrency, has already begun preparing for the quantum threat with a formal program and dedicated website. In contrast, bitcoin's development culture prioritizes stability and rare, hard changes, making the migration to quantum-resistant cryptography more challenging. The coordination problem is further complicated by questions about how to handle exposed coins, including whether to freeze old address formats or allow coins to be moved to new quantum-safe addresses. The clock is ticking for bitcoin to address the quantum threat before it's too late.