# NEXO (NEXO) Quantum Readiness Report

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

Evaluation date: 2026-06-05. Review status: draft. Evaluated scope: ERC-20 token on Ethereum mainnet (0xb62132e35a6c13ee1ee0f84dc5d40bad8d815206); token-specific admin/owner keys; centralized custodial infrastructure (Fireblocks, Ledger Vault).

NEXO is a standard ERC-20 token on Ethereum (QRI Rule 7.2 Token Inheritance) with no independent cryptographic layers, no PQC features, and no quantum migration planning. The token inherits Ethereum's base-layer quantum posture, but token-specific vulnerabilities create additional quantum-critical attack surfaces: a classical ECDSA-secured owner key with privileged transfer authority over allocation pools, and the Nexo platform's entirely classical custodial infrastructure (Fireblocks MPC, Ledger Vault) holding >70% of supply. Nexo published a blog post in April 2025 acknowledging quantum risk to Bitcoin, but this does not constitute a cryptographic inventory, risk assessment, or mitigation plan for the NEXO token. The final QRI Score of 1.0 reflects: (a) a Factor Score of 1.0 driven only by minimal migration-status coverage acknowledgment (<25% protected), (b) a Readiness & Risk Cap of 10 from absence of public cryptographic inventory, and (c) a Stage 1 cap of 20. No PQC protection exists at any layer for the NEXO token or its custodial dependencies.

## Core resources

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



## Evidence sources

- [Evidence source 1](<https://nexo.com/blog/dispatch-239-practicing-patience-in-crypto-investing>): Public source cited by the NEXO QRI assessment.
- [Evidence source 2](<https://support.nexo.com/article/nexo-token-faq>): Public source cited by the NEXO QRI assessment.
- [Evidence source 3](<https://nexo.com/security>): Public source cited by the NEXO QRI assessment.
- [Evidence source 4](<https://etherscan.io/token/0xb62132e35a6c13ee1ee0f84dc5d40bad8d815206>): Public source cited by the NEXO QRI assessment.
- [Evidence source 5](<https://ethereum.org/roadmap/future-proofing/quantum-resistance/>): Public source cited by the NEXO QRI assessment.
- [Evidence source 6](<https://pq.ethereum.org/>): Public source cited by the NEXO QRI assessment.
- [Evidence source 7](<https://github.com/nexofinance/NEXO-Token/blob/master/contracts/NexoToken.sol>): Public source cited by the NEXO QRI assessment.
- [Evidence source 8](<https://www.fireblocks.com/blog/google-quantum-research-institutional-crypto-security>): Public source cited by the NEXO QRI assessment.
- [Evidence source 9](<https://coincub.com/nexo-review/>): Public source cited by the NEXO QRI assessment.
- [Evidence source 10](<https://nexo.how/kb/information-security-and-custodial-arrangements/>): Public source cited by the NEXO QRI assessment.
- [Evidence source 11](<https://dune.com/cryptuschrist/nexo>): Public source cited by the NEXO QRI assessment.
- [Evidence source 12](<https://callisto.network/nexo-token-nexo-security-audit/>): Public source cited by the NEXO QRI assessment.
- [Evidence source 13](<https://etherscan.io/address/0xb62132e35a6c13ee1ee0f84dc5d40bad8d815206#code>): Public source cited by the NEXO QRI assessment.