# Stable (STABLE) Quantum Readiness Report

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

Evaluation date: 2026-06-05. Review status: draft. Evaluated scope: Native L1 asset (STABLE governance token) and StableChain protocol; EVM-compatible Layer-1 blockchain with StableBFT (CometBFT-based) consensus.

Stable (STABLE) is a recently launched (December 2025) EVM-compatible Layer-1 blockchain optimized for USDT payments, utilizing a CometBFT-based consensus mechanism (StableBFT). The project relies entirely on classical cryptographic primitives: ECDSA (secp256k1) for spend authorization via EVM compatibility, and Ed25519 for validator consensus signatures. There is no public evidence of any post-quantum cryptography (PQC) implementation, hybrid protection, quantum risk assessment, or migration roadmap. The absence of public source code, audits, and cryptographic specifications limits verification to whitepaper and documentation claims, which confirm a purely classical architecture. The project's published roadmap (Autobahn, StableVM++, StableDB) contains zero quantum-security items. As a result, the project scores minimally on the QRI, reflecting Stage 0 (Unassessed / No Evidence) with critical quantum vulnerabilities across all applicable layers.

## Core resources

- [Stable QRI report](https://qrindex.org/projects/stable-2/): Human-readable assessment with score, stage, evidence, blockers, risks, and assurance notes.
- [Stable structured report data](https://qrindex.org/projects/stable-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.
- [Stable official website](https://www.coingecko.com/en/coins/stable-2): Project-maintained website.



## Evidence sources

- [Evidence source 1](<https://www.stable.xyz/whitepaper.pdf>): Public source cited by the Stable QRI assessment.
- [Evidence source 2](<https://docs.stable.xyz/en/explanation/tech-overview>): Public source cited by the Stable QRI assessment.
- [Evidence source 3](<https://www.fourpillars.io/en/research/stable-a-digital-nation-of-usdt-by-usdt-for-usdt>): Public source cited by the Stable QRI assessment.
- [Evidence source 4](<https://www.datawallet.com/crypto/stablechain-explained>): Public source cited by the Stable QRI assessment.
- [Evidence source 5](<https://stable.xyz/whitepaper>): Public source cited by the Stable QRI assessment.
- [Evidence source 6](<https://docs.stable.xyz/en/explanation/consensus>): Public source cited by the Stable QRI assessment.
- [Evidence source 7](<https://blog.stable.xyz/stable-2025-year-in-review-and-2026-outlook>): Public source cited by the Stable QRI assessment.
- [Evidence source 8](<https://docs.stable.xyz/en/explanation/technical-roadmap>): Public source cited by the Stable QRI assessment.
- [Evidence source 9](<https://stablelabs.mintlify.app/en/explanation/sdk-overview>): Public source cited by the Stable QRI assessment.