AmericanFortress, a privacy-focused blockchain startup, has introduced a groundbreaking patent-pending post-quantum signature scheme designed to secure dormant Bitcoin assets from potential quantum attacks. This innovative approach aims to protect Satoshi Nakamoto's 1.1 million Bitcoin, along with nearly 5 million BTC in dormant wallets, which collectively represent a value of about $400 billion. The protocol will implement a backward-compatible soft fork that freezes vulnerable pre-BIP32 Bitcoin addresses, allowing the community to later decide on the fate of these funds. CEO Michal Pospieszalski emphasized that this method does not require mass fund migrations, making it efficient for users. The technology also promises negligible performance impact, as it integrates seamlessly with existing blockchain infrastructures. Active users can transition to quantum-proof wallets in just 50 milliseconds, while dormant wallets will receive protection programmatically. Following an $8 million seed funding round, AmericanFortress plans to present its cryptographic methods at an upcoming event in Paris on June 2. This advancement is seen as a pivotal moment for the future security of digital assets.