Blockstream CEO Urges Proactive Quantum-Resistant Upgrades for Bitcoin

Blockstream CEO Adam Back has called for the Bitcoin community to begin implementing quantum-resistant solutions, arguing that the network must be prepared for the eventual arrival of functional quantum computers. Speaking at Paris Blockchain Week, Back emphasized that while current quantum systems remain largely experimental, the safest strategy is to build optional migration paths for cryptography. The debate centers on the ability of quantum computers to break the elliptic curve cryptography that secures Bitcoin wallets. While Back estimates the actual threat is 20 to 40 years away, recent findings from Google and the California Institute of Technology suggest that quantum computers could arrive sooner and potentially execute "on-spend" attacks in as little as nine minutes. To mitigate these risks, Blockstream has already deployed hash-based signatures on its Liquid layer-2 network. Back noted that the existing Taproot protocol could potentially be leveraged to support alternative signature schemes without disrupting the experience for current users. The discussion has sparked a governance rift within the developer community. A new proposal, BIP-361, suggests freezing quantum-vulnerable coins—including Satoshi Nakamoto’s estimated $81.9 billion holdings—to prevent theft. This move has been heavily criticized by other developers as "authoritarian," highlighting the tension between security and the core tenet of censorship resistance.