Quantum Threat Looms Over Bitcoin's Cryptographic System

The cryptographic system used by Bitcoin could be at risk from quantum computer attacks, according to recent research. A study suggests that around 6.9 million BTC, approximately one-third of all mined coins, are exposed due to their public keys being permanently visible on the blockchain.

This exposure has sparked debate among developers about the need for a migration to post-quantum cryptography. Ethereum, a rival blockchain, has been working on a formal quantum-resistant program since 2018 and is considered to be ahead of Bitcoin in addressing this issue.

Bitcoin's lack of formal governance and culture of resistance to coordinated change are making it difficult to implement solutions. The migration would require decisions that the network has historically avoided, such as freezing old address formats or allowing exposed coins to move to new quantum-safe addresses.