# QuStream (QST) Quantum Readiness Report

> QuStream has a QRI score of 6.25/100 and is assessed at Stage 1 (Unspecified) with low evidence confidence.

Evaluation date: 2026-06-01. Review status: draft. Evaluated scope: QST token (Solana SPL) and planned native QuStream L1 blockchain ecosystem.

QuStream is a pre-mainnet quantum-safe blockchain project whose QST token currently operates as an SPL token on Solana, inheriting Solana's quantum-vulnerable Ed25519 spend authorization. The project has published research describing a proprietary Operational Perfect Secrecy (OPS) / Symmetric Key Infrastructure (SKI) design with information-theoretic security claims, and maintains a devnet encryption manager. However, as of 2026-06-01, the native L1 blockchain—planned for Q1 2026 launch—remains 'In Progress' on the official roadmap with no mainnet genesis, explorer, or verifiable transaction history. The published cryptographic design focuses on symmetric encryption for data-in-transit and does not specify a standardized or broadly reviewed post-quantum digital signature algorithm for blockchain spend authorization or consensus. The Halborn audit covers only the Solana staking contract and is scope-mismatched for quantum-critical claims. All quantum-safe protection for blockchain layers remains roadmap/design only, with zero production migration coverage. The QRI Score of 6.25 reflects the project's Stage 1 (Quantum Risk Assessed) status: meaningful quantum risk assessment and research exist, but no production PQC protection is live, and the current production scope is entirely quantum-vulnerable.

## Core resources

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



## Evidence sources

- [Evidence source 1](<https://qustream.com/>): Public source cited by the QuStream QRI assessment.
- [Evidence source 2](<https://qustream.co.uk/>): Public source cited by the QuStream QRI assessment.
- [Evidence source 3](<https://qustream.com/documentation>): Public source cited by the QuStream QRI assessment.
- [Evidence source 4](<https://qustream.com/roadmap>): Public source cited by the QuStream QRI assessment.
- [Evidence source 5](<https://qustream.com/network>): Public source cited by the QuStream QRI assessment.
- [Evidence source 6](<https://github.com/qustream>): Public source cited by the QuStream QRI assessment.
- [Evidence source 7](<https://solflare.com>): Public source cited by the QuStream QRI assessment.
- [Evidence source 8](<https://www.halborn.com/audits/qustream/qst-staking-protocol-decbba>): Public source cited by the QuStream QRI assessment.
- [Evidence source 9](<https://qustream.com/token>): Public source cited by the QuStream QRI assessment.
- [Evidence source 10](<https://coinmarketcap.com/currencies/qustream/>): Public source cited by the QuStream QRI assessment.
- [Evidence source 11](<https://www.lbank.com/price/qustream>): Public source cited by the QuStream QRI assessment.
- [Evidence source 12](<https://phantom.com/tokens/solana/AUuCEHQ7sm2i5GmaHrpE961voWcTY8U6mgrkhcV7pump>): Public source cited by the QuStream QRI assessment.