AmericanFortress has developed a patent-pending post-quantum signature scheme that aims to protect existing crypto assets, including dormant and pre-BIP32 bitcoin addresses, via a backward-compatible soft fork and zero-knowledge proofs. Its protocol deploys three solutions—pre-BIP32 raw key protection, standard BIP32 quantum protection, and a high-speed "QBIP32" derivation scheme—and integrates with existing curves to minimize performance impact. The company says its approach can secure major chains such as Bitcoin, Ethereum, Solana, and Tron and claims it could protect Satoshi-era holdings (about 1.1M BTC) and nearly 5M BTC in dormant accounts. AmericanFortress reports that active users can quantum-proof wallets in roughly 50 milliseconds via a wallet prompt, and that protecting dormant wallets can be done programmatically at the base layer. The firm is licensing its SDK to Layer 1 and Layer 2 blockchains for marketing positioning and is open to exclusive acquisitions. Financially, the company is backed by an $8 million seed round co-led by SAVA Digital Asset Fund, Moon Pursuit Capital and 0G Labs.

Total raised

$8M

Funding rounds

1

Latest round

Seed

Latest activity

May 2026