# Qubitcoin (QTC) Quantum Readiness Report

> Qubitcoin has a QRI score of 5/100 and is assessed at Stage 0 (Unassessed / No Evidence) with high evidence confidence.

Evaluation date: 2026-06-07. Review status: draft. Evaluated scope: Native asset (QTC) on Qubitcoin Layer-1 blockchain network, production mainnet since October 2024.

Qubitcoin (QTC) scores 5/100 on the Quantum Readiness Index, placing it at Stage 0 (Unassessed / No Evidence). The project is a Bitcoin Core fork whose 'quantum' branding refers exclusively to its Quantum Proof of Work (qPoW) consensus mechanism—miners simulate 16-qubit quantum circuits on GPUs as part of the block hashing process. This provides zero cryptographic protection against quantum attacks on transaction signatures. All spend authorization relies on classical ECDSA/secp256k1, inherited unchanged from Bitcoin and confirmed by the official wallet code (deterministic ECDSA per RFC 6979). The project has published no cryptographic inventory, no quantum threat model, no PQC migration plan, and has undergone no independent security audit. The state-integrity layer (SHA256 Merkle commitments) is quantum-safe, earning partial credit in Production Cryptographic Protection (4.04/35), but the critical spend-authorization layer is entirely quantum-vulnerable. Approximately 100% of on-chain value is held in ECDSA-secured addresses with no migration path. Secondary claims that Qubitcoin implements post-quantum transaction validation are contradicted by all primary sources and stem from confusion with a separate project (QubitCoin/QBTC by qubitcoin-finance, which does use ML-DSA-65 Dilithium). The QRI Score is capped at 5 by the Stage Cap for Stage 0.

## Core resources

- [Qubitcoin QRI report](https://qrindex.org/projects/qubitcoin-2/): Human-readable assessment with score, stage, evidence, blockers, risks, and assurance notes.
- [Qubitcoin structured report data](https://qrindex.org/projects/qubitcoin-2/report.json): Complete report as JSON for deterministic machine processing.
- [QRI methodology](https://qrindex.org/methodology/): Scoring model, evidence handling, readiness stages, confidence, assurance, and report status.
- [All QRI project reports](https://qrindex.org/llms.txt): Score-ranked index of every published project assessment.
- [Qubitcoin official website](https://superquantum.io/qubitcoin): Project-maintained website.
- [Qubitcoin source repository 1](https://github.com/super-quantum/qubitcoin): Project source code referenced by QRI.



## Evidence sources

- [Evidence source 1](<https://superquantum.io/qubitcoin>): Public source cited by the Qubitcoin QRI assessment.
- [Evidence source 2](<https://github.com/super-quantum/qubitcoin>): Public source cited by the Qubitcoin QRI assessment.
- [Evidence source 3](<https://medium.com/@superquantum>): Public source cited by the Qubitcoin QRI assessment.
- [Evidence source 4](<https://github.com/super-quantum/qubitcoin-coinbin>): Public source cited by the Qubitcoin QRI assessment.
- [Evidence source 5](<https://github.com/bitcoin/bitcoin/blob/master/src/key.cpp>): Public source cited by the Qubitcoin QRI assessment.
- [Evidence source 6](<https://explorer.superquantum.io/>): Public source cited by the Qubitcoin QRI assessment.
- [Evidence source 7](<https://bitcointalk.org/index.php?topic=5538348>): Public source cited by the Qubitcoin QRI assessment.
- [Evidence source 8](<https://github.com/bitcoin/bitcoin/blob/master/src/pubkey.cpp>): Public source cited by the Qubitcoin QRI assessment.
- [Evidence source 9](<https://github.com/super-quantum/qubitcoin-electrum>): Public source cited by the Qubitcoin QRI assessment.
- [Evidence source 10](<https://coinmarketcap.com/currencies/superquantum-qubitcoin/>): Public source cited by the Qubitcoin QRI assessment.
- [Evidence source 11](<https://github.com/super-quantum/qubitcoin/blob/master/SECURITY.md>): Public source cited by the Qubitcoin QRI assessment.
- [Evidence source 12](<https://skynet.certik.com/projects/superquantum-qubitcoin>): Public source cited by the Qubitcoin QRI assessment.