AmericanFortress has unveiled a patent-pending post-quantum signature scheme designed to protect dormant cryptocurrency assets, including Satoshi Nakamoto’s 1.1 million bitcoin, from future quantum attacks without requiring mass fund migrations. The privacy-centric blockchain startup’s protocol covers Bitcoin, Ethereum, Solana, and Tron, using zero-knowledge proofs to freeze vulnerable funds pending governance decisions. CEO Michal Pospieszalski stated the approach enables “Sudden quantum proofing of BTC” through backward-compatible soft forks.
The Quantum Threat to Dormant Bitcoin Holdings
Quantum computers capable of reversing private keys from exposed public keys represent an existential risk to cryptocurrency holders who have never moved their funds. Pre-BIP32 addresses, particularly from the Satoshi era, lack seed phrase derivation and cannot auto-upgrade like modern wallets. Approximately 5 million bitcoin remain dormant across exchanges and personal wallets, representing roughly $400 billion in vulnerable assets. Pospieszalski emphasized the protocol would “automatically freeze and protect those funds until governance decides what to do with them after Q-day,” referencing the unspecified point when quantum threat materializes.
Protocol Design and Funding Support
AmericanFortress secured $8 million in seed funding from SAVA Digital Asset Fund, Moon Pursuit Capital, and 0G Labs to develop the quantum-resistant infrastructure. Early June 2026 cryptographic methods for Bitcoin are expected ready for discussion, with an official presentation scheduled in Paris on June 2, 2026. Testing on BNB Chain revealed a 40% transaction throughput slowdown during quantum-security implementation, while active user migration completed in 50 milliseconds. The backward-compatible approach means existing wallets require only minor protocol upgrades rather than forced asset transfers.
Industry Implications and Governance Challenges
An estimated $600 billion in total crypto assets currently sit in vulnerable state, with 100% of Solana addresses lacking quantum resistance. The protocol’s success depends on achieving consensus across decentralized governance structures—a task complicated by the dormant nature of target assets. Pospieszalski noted the framework enables protection “with a minor BIP,” referencing Bitcoin Improvement Proposals, but adoption timelines for Ethereum, Solana, and other chains remain undefined. Regulatory approval pathways and community acceptance thresholds for the governance mechanism have not been detailed.
Next Steps and Unresolved Variables
AmericanFortress expects to present cryptographic methods for Bitcoin protection in early June 2026. The critical variable remains the actual timeline for Q-day—the moment quantum computing advances pose real risk. Without urgency from major exchanges and wallet providers, voluntary adoption of quantum-resistant protocols may face resistance. The startup’s patent-pending approach represents the first backward-compatible framework for protecting pre-BIP32 addresses, but chain-by-chain implementation decisions now rest with individual protocol governance bodies.
