- Modified UI includes “View Quantum Proofs” and “View Post-Quantum Address” options to examine resistant signature and address data.
- Sigman argues BIP-360 adoption will formalize quantum-safe address formats, requiring protocol updates and consensus across node operators developers.
Ben Sigman forked BlueWallet on June 26 and added post-quantum algorithms to test Bitcoin’s future defenses.
He integrated SHAKE-127 and SPHINCS+, two schemes from NIST’s 2024 draft, into the wallet’s code. These methods aim to resist quantum-powered attacks such as Shor’s algorithm, which could break today’s elliptic-curve signatures.
In this experiment, Sigman generated a real address from a standard seed phrase. However, the address uses a “bc1s” prefix and an incompatible signature type. As a result, the wallet cannot process real Bitcoin transactions yet.
Sigman labels the release a proof of concept. He said the goal is to show that users and developers can explore how quantum-resistant signatures might work in practice. The modified interface lets users view “Quantum Proofs” and inspect the “Post-Quantum Address” alongside their regular keys.
Post-quantum cryptography replaces current digital signatures with new methods resistant to quantum computers. If a future device cracks today’s private keys, funds would remain secure under these new schemes.
In December, Sigman argued for Bitcoin Improvement Proposal 360 to prepare the network for quantum threats. That proposal would standardize how Bitcoin handles quantum-safe addresses and signatures.
Forked BlueWallet and added Post-Quantum cryptography here.
A proof of concept to show that simple, practical defenses do exist against the quantum threat to Bitcoin…
This is based on recent conversations @dotkrueger and I have had with the legendary @chaumdotcom pic.twitter.com/a5VROybg8s
— Ben Sigman (@bensig) June 26, 2025
BlueWallet’s fork does not yet support on-chain use. Signatures and address formats must align with Bitcoin’s rules before any transaction can clear. Still, the code offers a clear path for developers to test and refine quantum-safe tools.
Solving these challenges requires both protocol updates and community consensus. Sigman’s work shows that the code base can adapt, given time and coordination. Wallet developers and node operators will need to agree on new address rules and signature checks.
