Project Eleven Demonstrates a Post-Quantum Recovery Proof for Bitcoin Wallets

Project Eleven published a working proof-of-concept aimed at one of Bitcoin’s hardest long-term quantum-migration problems: how a legitimate owner could prove control of a wallet after a sufficiently powerful quantum computer might forge the wallet’s ordinary elliptic-curve signature. The approach used the wallet’s own hierarchical key derivation as evidence, allowing a user to prove in zero knowledge that higher-level BIP32 key material derives the private key associated with an address and bind that proof to an authorized migration message.

The demonstration did not change Bitcoin consensus, recover existing coins on mainnet, or establish a production migration system. Its importance was that it moved a difficult theoretical question into runnable cryptographic work. Instead of assuming that exposed public keys would leave no way to distinguish a real holder from a quantum attacker, the prototype explored whether wallet-history structure could provide an additional ownership signal.

Later post-quantum Bitcoin experiments increased the historical interest of this July proof, but the event should remain described at its actual maturity level: an experimental proof-of-concept. Its place in the timeline is as an early concrete step in the 2026 effort to turn quantum-risk discussion into mechanisms that Bitcoin developers could test and evaluate.