Bitcoin’s security model depends on cryptography that could eventually be challenged by powerful quantum computers. A new research project is exploring whether zero-knowledge proofs could give users a way to prove wallet ownership without exposing the private keys that control their funds.
Project Eleven, a post-quantum cryptography company, announced on July 15, 2026, that it had developed a faster zero-knowledge proof prototype designed to help verify control of Bitcoin wallets without publicly revealing sensitive key information.
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The technology is aimed at a potential “Q-Day” scenario — a point when sufficiently advanced quantum computers could theoretically undermine the elliptic-curve cryptography used by Bitcoin and other digital assets. Researchers have warned that such a development could create uncertainty around ownership of wallets whose public keys have been exposed.
How Could Project Eleven’s Zero-Knowledge Proof Work?
Zero-knowledge proofs allow one party to demonstrate that they know or control certain information without revealing the information itself.
Project Eleven’s approach is designed to let users prove control over the cryptographic structure behind a wallet address without exposing private key material.
The company said the method can demonstrate that a wallet’s underlying key information exists within a supported derivation structure and can produce the corresponding private key.
The system relies on hardened derivation steps used in some cryptocurrency wallet designs. Project Eleven said that while quantum computers could potentially threaten elliptic-curve calculations used to derive public keys, they would not be able to reverse the hash-based hardened derivation functions used in this approach.
The proof can also be tied to a specific transaction message, allowing a user to verify ownership for a particular action without revealing the wallet’s sensitive information.
Project Eleven reported that its prototype generated proofs in 243 milliseconds and verified them in 40 milliseconds on an Apple M5 MacBook Air using four CPU cores and no GPU acceleration. The company reported peak memory usage of 2.1 GB and a proof size of 358 KiB.
According to Project Eleven, the implementation is roughly 16 times faster than a previous approach by developer Olaoluwa Osuntokun, which required 14.6 seconds and GPU acceleration. The work builds on earlier research concepts developed by researchers Sattath and Wyborski.
What Are the Limits of the Technology?
Project Eleven described the release as an early, unaudited prototype. The system does not currently allow users to recover assets on any live blockchain.
The technology supports three Bitcoin address types — P2PKH, P2WPKH, and P2SH-P2WPKH — but any real-world deployment would require Bitcoin or other blockchain networks to adopt explicit protocol-level support for verifying these proofs.
The project is therefore not a current solution for lost wallets or quantum attacks. Instead, it represents one possible approach researchers are exploring as the cryptocurrency industry considers long-term cryptographic upgrades.
Why Quantum Resistance Is Becoming a Bitcoin Security Issue
Bitcoin and many other cryptocurrencies rely on elliptic-curve cryptography to verify wallet ownership and authorize transactions. If sufficiently powerful quantum computers become available, attackers could theoretically use them to calculate private keys from exposed public keys.
The threat is not considered an immediate problem for current Bitcoin users. However, cryptographers and blockchain developers have been studying migration strategies because changing a global financial network’s security model could require years of coordination.
Many researchers expect users will eventually need to move funds to post-quantum addresses or adopt new cryptographic standards. The challenge is that some wallet owners may fail to migrate, while others may avoid transactions that reveal public keys.
Project Eleven’s research explores whether zero-knowledge proofs could provide another mechanism for proving ownership during such a transition.
Why This Matters
If adopted, quantum-resistant recovery proofs could give crypto users another way to protect access to funds as quantum computing advances. The research adds to wider efforts to prepare Bitcoin and other digital assets for a future where current cryptographic protections may no longer be secure.
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