Project Eleven has funded a proof that lets a Bitcoin wallet's own key-derivation path serve as proof of ownership — even after quantum computers can forge its signatures. The recovery tool runs in 243 milliseconds on a standard laptop. It does not, however, apply to Satoshi Nakamoto's 1.1 million bitcoins.
How the proof works
The tool exploits a property of hierarchical deterministic wallets: the key-derivation path itself acts as a unique identifier. Once a quantum computer can generate valid signatures from a public key, that path becomes the only thing tying a user to their coins. The proof shows that path can be used to reclaim ownership without relying on the broken signature scheme. The 243-millisecond runtime means the process is fast enough to be practical in a real attack scenario.
Why Satoshi's coins are safe
The tool explicitly excludes the earliest Bitcoin blocks. Satoshi's 1.1 million bitcoins were mined before HD wallets existed — they use simple keypairs with no derivation path. That means the proof doesn't help anyone claim those coins, even if a quantum computer could forge Satoshi's signatures. The timing isn't great for anyone hoping to unlock that dormant fortune, but it does remove one potential vector for post-quantum theft of the oldest stash.
The quantum threat timeline
Project Eleven's funding suggests the quantum threat is moving from theoretical to practical. Most estimates put a cryptographically relevant quantum computer at least a decade away, but the industry is already racing to build defenses. This proof is one of the first to show a working, laptop-grade solution for a specific vulnerability. It doesn't solve the broader problem — every Bitcoin transaction still exposes a public key — but it buys time for wallets that use HD paths.
Project Eleven hasn't announced a production rollout. The proof is funded, not deployed. The next step would be integrating the mechanism into wallet software or a Bitcoin Improvement Proposal. Until then, the tool remains a demonstration that quantum-proof ownership is possible — just not for everyone.
