Bitcoin Quantum Resistance: AmericanFortress calls for a soft fork to freeze Satoshi's 1.1 million BTC to protect against quantum threats

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With the continuous breakthroughs in quantum computing technology, the blockchain industry's fear of "Q-Day" is escalating. The privacy-focused blockchain startup AmericanFortress claims to have developed a patent-pending post-quantum signature scheme that can freeze and protect Satoshi Era Pre-BIP32 addresses—covering approximately 1.1 million Bitcoin and nearly 5 million dormant BTC, with a total value approaching $400 billion—via a backward-compatible soft fork, without the need for large-scale asset migration. (Summary: Bitcoin resisting quantum threats: BIP 360 proposal removes Taproot's vulnerable paths, soft fork introduces new output type P2MR) (Background: Bitcoin's biggest time bomb hasn't exploded yet, but this might be your biggest opportunity) For nearly two decades since the inception of Bitcoin, the massive amount of dormant Bitcoin left from the Satoshi Era has remained one of the market's most unresolved mysteries. Today, these sleeping assets are facing a brand-new threat: quantum computers. The US-based blockchain security startup AmericanFortress recently announced in an exclusive interview with CoinDesk that its team has developed a patent-pending Post-Quantum Signature Scheme, aimed at protecting the entire cryptocurrency ecosystem from the impact of future quantum attacks. CEO Michal Pospieszalski emphasized that the biggest highlight of this scheme is that even the 1.1 million Bitcoin from the Satoshi Era that have never moved can be safely frozen and protected through a soft fork. Pospieszalski pointed out in the interview that while quantum computers are currently unable to crack Seed Phrases, they can reverse-engineer private keys from publicly exposed public keys on-chain—meaning all addresses that have ever sent a transaction are in a vulnerable state. According to AmericanFortress's research estimates, over $600 billion in crypto assets are at such high risk of exposure, with 100% of addresses on the Solana network being threatened. "This is already common knowledge in the industry," Pospieszalski stated bluntly. The crux of the problem lies in the generational differences in wallet technology. Bitcoin addresses from the Satoshi Era belong to the "Pre-BIP32" type—these addresses lack a seed phrase derivation mechanism and therefore cannot be automatically upgraded to quantum-resistant levels via simple software updates like modern BIP32 wallets. The solution from AmericanFortress is to implement a defensive freeze through a backward-compatible soft fork: the protocol would automatically freeze assets in these Pre-BIP32 addresses until the community decides on subsequent handling via governance mechanisms—options include unfreezing for movement, permanent burning, or redistribution to the ecosystem. "Our quantum-resistant protocol will automatically freeze and protect these funds until governance mechanisms decide their fate after Q-Day," Pospieszalski said. He added that this means through a small BIP (Bitcoin Improvement Proposal), even Satoshi's wallet could be protected. The AmericanFortress scheme is not a single technology but deploys a three-layer complementary solution: Pre-BIP32 Original Key Protection: For legacy addresses like those from the Satoshi Era without seed phrases, it enforces a freeze via soft fork and verifies master seed ownership using ZK Proof. Standard BIP32 Quantum Protection: For modern BIP32 wallet addresses, users can upgrade to a quantum-resistant level in just 50 milliseconds via a simple wallet prompt. High-Speed QBIP32 Derivation Scheme: A new derivation standard developed by AmericanFortress that achieves high-speed quantum protection while natively integrating with existing curves, without causing any performance loss. "This is essentially a software update for nodes and wallets, executed in sequence," Pospieszalski explained. Behind this groundbreaking announcement is an $8 million seed round just completed by AmericanFortress, co-led by SAVA Digital Asset Fund, Moon Pursuit Capital, and 0G Labs. Along with the funding news, the company released a cryptography white paper detailing the network performance bottlenecks encountered by other post-quantum schemes in the past and how AmericanFortress bypasses these issues through ZK proofs. Pospieszalski revealed that AmericanFortress is actively licensing its SDK to Layer 1 and Layer 2 blockchains in exchange for marketing exposure and ecosystem positioning, though the company is not ruling out the possibility of a full acquisition. This Bitcoin post-quantum cryptography scheme is expected to be submitted for community discussion in the coming weeks and will be officially unveiled at an event in Paris on June 2. "Real-time quantum resistance for Bitcoin is now technically possible," Pospieszalski concluded.

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