Quantum Alliance Targets Bitcoin’s Quantum Risk

Nine crypto organisations, including Quantus, American Fortress and Intmax, have formed the Quantum Alliance to develop open standards and tests for quantum-resistant blockchains. Its work covers network migration, post-quantum zero-knowledge proofs, wallet and key security, and cross-chain compatibility. The alliance plans to publish its work publicly, addressing practical gaps between NIST’s post-quantum cryptography standards and blockchain requirements. New signature schemes could increase transaction sizes and fees, while adoption would require coordination among networks, users and node operators. The alliance estimates that about 6.04 million BTC—roughly 30% of Bitcoin’s supply—may be exposed because public keys are already visible on-chain. A sufficiently powerful quantum computer could theoretically use Shor’s algorithm to derive private keys. The latest account adds forecasts that the risk window could begin in the late 2020s, with one model pointing to March 2028, and says Google Quantum AI has lowered its estimate of the resources needed to break Bitcoin cryptography to fewer than 500,000 qubits. These are projections, not evidence of an active attack. For traders, the alliance is a long-term security development rather than a near-term price catalyst; the impact depends on adoption by networks, wallets and custodians.