# QuantumCoin (Q) Quantum Readiness Report

> QuantumCoin has a QRI score of 55/100 and is assessed at Stage 3 (Migration Live) with medium evidence confidence.

Evaluation date: 2026-06-01. Review status: draft. Evaluated scope: Native asset (Q) on QuantumCoin L1 mainnet, launched 2023-12-31, plus multi-fork migration from Bitcoin, Ethereum, Dogecoin, and DogeP tokens.

QuantumCoin (Q) is a hybrid-PQ Layer-1 smart-contract blockchain launched on mainnet December 31, 2023. The native asset uses mandatory hybrid signatures (ML-DSA FIPS 204 + SLH-DSA FIPS 205 + Ed25519) for all transaction and consensus authentication, and hybrid X25519 + ML-KEM-768 (FIPS 203) for all P2P node sessions. Addresses are 32 bytes, providing additional collision resistance. Because the chain launched with hybrid-PQC from genesis and has no classical-native ownership namespace, native-asset migration from ECC is complete by design. However, the multi-fork migration model from Bitcoin, Ethereum, and Dogecoin creates a critical quantum vulnerability: unclaimed balances on legacy chains remain exposed to quantum attacks with no deprecation, freeze, or burn policy, and the claim process itself requires classical Ethereum signatures. The final QRI score is capped at 55 due to material long-exposure quantum-vulnerable value with no mitigation path. No independent cryptographic audit exists, which limits confidence to Medium.

## Core resources

- [QuantumCoin QRI report](https://qrindex.org/projects/quantumcoin/): Human-readable assessment with score, stage, evidence, blockers, risks, and assurance notes.
- [QuantumCoin structured report data](https://qrindex.org/projects/quantumcoin/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.
- [QuantumCoin official website](https://quantumcoin.org): Project-maintained website.
- [QuantumCoin source repository 1](https://github.com/quantumcoinproject/quantum-coin-go): Project source code referenced by QRI.



## Evidence sources

- [Evidence source 1](<https://quantumcoin.org/quantum-resistance.html>): Public source cited by the QuantumCoin QRI assessment.
- [Evidence source 2](<https://quantumcoin.org/faq.html>): Public source cited by the QuantumCoin QRI assessment.
- [Evidence source 3](<https://github.com/quantumcoinproject/quantum-coin-go>): Public source cited by the QuantumCoin QRI assessment.
- [Evidence source 4](<https://quantumcoin.org/whitepapers/Quantum-Coin-Blockchain-Quantum-Resistance-Whitepaper.pdf>): Public source cited by the QuantumCoin QRI assessment.
- [Evidence source 5](<https://quantumscan.com/>): Public source cited by the QuantumCoin QRI assessment.
- [Evidence source 6](<https://quantumcoin.org/whitepapers.html>): Public source cited by the QuantumCoin QRI assessment.
- [Evidence source 7](<https://quantumcoin.org/integration.html>): Public source cited by the QuantumCoin QRI assessment.
- [Evidence source 8](<https://github.com/quantumcoinproject/quantum-coin-js-sdk>): Public source cited by the QuantumCoin QRI assessment.
- [Evidence source 9](<https://quantumcoin.org/consensus.html>): Public source cited by the QuantumCoin QRI assessment.
- [Evidence source 10](<https://quantumcoin.org/>): Public source cited by the QuantumCoin QRI assessment.
- [Evidence source 11](<https://github.com/quantumcoinproject/quantum-coin-go/blob/main/p2p/rlpx/README.md>): Public source cited by the QuantumCoin QRI assessment.
- [Evidence source 12](<https://coinmarketcap.com/currencies/quantumcoin/>): Public source cited by the QuantumCoin QRI assessment.
- [Evidence source 13](<https://snapshot.quantumcoin.org/>): Public source cited by the QuantumCoin QRI assessment.
- [Evidence source 14](<https://quantumcoin.org/getting-coins-for-tokens-cli-wallet.html>): Public source cited by the QuantumCoin QRI assessment.
- [Evidence source 15](<https://pkg.go.dev/github.com/quantumcoinproject/quantum-coin-go>): Public source cited by the QuantumCoin QRI assessment.
- [Evidence source 16](<https://github.com/quantumcoinproject/quantum-coin-go/blob/main/defaults/config.go>): Public source cited by the QuantumCoin QRI assessment.
- [Evidence source 17](<https://github.com/quantumcoinproject/quantum-coin-go/blob/main/crypto/crypto.go>): Public source cited by the QuantumCoin QRI assessment.