# Cronos (CRO) Quantum Readiness Report

> Cronos has a QRI score of 1/100 and is assessed at Stage 1 (Quantum Risk Assessed) with medium evidence confidence.

Evaluation date: 2026-06-02. Review status: draft. Evaluated scope: Cronos EVM L1 chain (Cosmos SDK + Ethermint + CometBFT); native asset CRO on the EVM chain. Cronos zkEVM L2 and Cronos POS chain are separate networks not evaluated in this scope..

Cronos (CRO) is a Cosmos SDK + Ethermint EVM-compatible L1 blockchain with CometBFT consensus. As of 2026-06-02, the project exhibits zero quantum readiness across all five QRI categories. No public cryptographic inventory, quantum risk assessment, PQC roadmap, testnet, prototype, or deployed mitigation exists. All production cryptography is classical and fully quantum-vulnerable: secp256k1 ECDSA for EVM spend authorization and Ed25519 for CometBFT validator consensus signatures. The EVM account model permanently exposes public keys after the first transaction, creating a large and growing long-exposure (at-rest) attack surface for quantum key-recovery attacks. The 2025-2026 Cronos roadmap prioritizes AI agents, tokenization, and scalability with no mention of quantum security. Independent assessment by LayerQu confirms Migration Stage 0 (Unaware-of-deployment-path). The QRI Score of 1/100 reflects near-total absence of quantum-attack readiness, capped by the absence of even a basic public cryptographic inventory.

## Core resources

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



## Evidence sources

- [Evidence source 1](<https://docs.cronos.org/>): Public source cited by the Cronos QRI assessment.
- [Evidence source 2](<https://whitepaper.cronos.org/>): Public source cited by the Cronos QRI assessment.
- [Evidence source 3](<https://github.com/crypto-org-chain/cronos>): Public source cited by the Cronos QRI assessment.
- [Evidence source 4](<https://layerqu.com/chains/cronos/>): Public source cited by the Cronos QRI assessment.
- [Evidence source 5](<https://github.com/crypto-org-chain/chain-main>): Public source cited by the Cronos QRI assessment.
- [Evidence source 6](<https://docs.cronos.org/cronos-chain-protocol/chain-details/technical-glossary>): Public source cited by the Cronos QRI assessment.
- [Evidence source 7](<https://explorer.cronos.org/>): Public source cited by the Cronos QRI assessment.
- [Evidence source 8](<https://blog.cronos.org/p/roadmap-on-chain-dominance>): Public source cited by the Cronos QRI assessment.