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Project Eleven unveils post-quantum proof for Bitcoin wallet recovery

The prototype is unaudited and would need blockchain protocol support to verify wallet ownership after quantum computers can forge signatures.

Reported · Written up by our desk · Market Structure

Project Eleven introduced a post-quantum cryptographic technique aimed at helping Bitcoin users prove wallet ownership after Q-Day, the point when quantum computers can break the elliptic curve cryptography used in Bitcoin transactions. The firm said the focus is not preventing quantum attacks, but establishing ownership once attackers can derive private keys and generate signatures indistinguishable from the legitimate owner.

In practice, Project Eleven’s approach is designed to let users verify they control the parent key that generates a wallet’s private key, without revealing that seed information. The company said a quantum computer cannot reconstruct the parent key from the derived information, enabling it to distinguish an authentic owner from an attacker even after a wallet’s private key is compromised.

According to Decrypt, the company developed the work with Binius maintainer Jim Posen and builds on earlier academic research, including a method known as signature lifting. The prototype remains unaudited, and it would require support from the Bitcoin blockchain protocol before it could be used.

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