Status: QSBitcoin is a fully functional quantum-safe Bitcoin implementation based on Bitcoin Core v28.0. It adds NIST-standardized post-quantum signatures while maintaining full backward compatibility with the Bitcoin network. Currently active on testnet and regtest networks for testing and development.
QSBitcoin uses peer-to-peer technology to operate with no central authority or banks; managing transactions and the issuing of qsbitcoins is carried out collectively by the network. QSBitcoin is open-source; its design is public, nobody owns or controls QSBitcoin and everyone can take part.
QSBitcoin implements two NIST-standardized post-quantum signature schemes: ML-DSA-65 (Module-Lattice Digital Signature Algorithm) for standard transactions and SLH-DSA-192f (Stateless Hash-Based Digital Signature Algorithm) for high-value cold storage.
Using innovative unified opcodes (OP_CHECKSIG_EX and OP_CHECKSIGVERIFY_EX), QSBitcoin supports multiple quantum algorithms with just two new opcodes, reducing complexity and improving extensibility.
QSBitcoin is implemented as a soft fork of Bitcoin Core, meaning it's fully backward compatible. Both ECDSA and quantum signatures are accepted, allowing users to migrate at their own pace.
All quantum-safe features are now fully implemented. The codebase includes complete wallet integration, transaction signing, and comprehensive test coverage with all quantum-specific unit tests passing.
Fixed quantum signature verification, manual UTXO selection, and witness script parsing. All quantum addresses can now generate, receive, and spend funds successfully.
QSBitcoin is fully operational on regtest and testnet networks. Both ML-DSA and SLH-DSA signatures work in all transaction scenarios. Mainnet activation awaits community consensus.
QSBitcoin is a fully operational quantum-safe Bitcoin implementation with comprehensive test coverage. Quantum addresses can generate, receive, and spend funds on regtest and testnet networks.
To incentivize adoption, QSBitcoin offers fee discounts: 10% off for ML-DSA signatures and 5% off for SLH-DSA signatures, with special weight calculations that reflect actual validation costs.
No forced migration - users control when to switch from ECDSA to quantum signatures. Mixed transactions supporting both signature types are fully supported.
The complete implementation is available at github.com/qsbitcoin/qsbitcoin under the MIT license. Based on Bitcoin Core v28.0 with full documentation and test coverage.