---
title: About the Hardy Index
url: "https://hardyindex.com/about"
---

# About the Hardy Index

The Hardy Index is an independent readiness benchmark. It scores how prepared each major blockchain is for the quantum-computing threat, and nothing else.

> This is a security-readiness assessment, not investment advice.

## Why this exists

In March 2026 a Google Quantum AI paper cut the estimated resources needed to break the elliptic-curve cryptography behind most blockchains by roughly a factor of twenty. Since then "which blockchain is quantum-safe?" has stopped being a specialist question. The answers circulating are mostly listicles and project marketing, and several of them are out of date. IOTA, for example, is still widely described as quantum-resistant on the strength of a signature scheme it removed in 2021.

## Neutrality statement

- **We rate; we do not recommend.** Nothing on this site is investment advice.
- **No chain can pay for a rating, a review or a position.** There is no paid placement and no sponsored profile.
- **No affiliate links, no advertising and no referral revenue anywhere in the index.** The guides carry disclosed affiliate links and labelled sponsorship, which never influence a score, a tier or a position. See https://hardyindex.com/how-we-make-money.
- **We hold no position that a rating could move.**
- **The rubric is public before the scores are.**
- **Corrections are logged in public**, in the changelog, with a reason and a source.

## How we work

Each chain is assessed against primary sources: the chain's own documentation and roadmaps, standards published by NIST, public code repositories and improvement proposals, and named research papers. Secondary sources are labelled as secondary in the source list on that chain's profile.

Scores are set editorially in this phase, which means a person reads the sources and writes the note. The rubric, anchors and derived deployment mapping exist to constrain that judgement, and the build refuses to publish a dataset whose tiers and scores contradict each other.

## Chains we have held back

A chain is published only once its signature scheme and its post-quantum status can be confirmed against a primary source. Where a project markets post-quantum protection but we cannot verify what is deployed, we hold the row rather than guess in either direction.

- **Cellframe.** Its documentation lists post-quantum algorithms as available, but we could not confirm which scheme secures ordinary transactions by default or whether post-quantum signing is mandatory.
- **QANplatform.** It markets a quantum-resistant layer 1 built on CRYSTALS-Dilithium and its components carry third-party audits, but there is no public mainnet, so there is no deployed scheme to inspect and no live balances to assess.
- **Quranium.** Its mainnet is described as live and natively SPHINCS+, but the developer documentation was not reachable, so the claim rests on announcements rather than a specification we could inspect.

Each is added as soon as the deployed scheme can be verified.

## Corrections and contact

Send the primary source that contradicts a score to index@hardyindex.com. Corrections are published in the changelog, including corrections to our own errors.

## Citing and reusing the index

Every page has a Markdown mirror at the same URL with a `.md` extension, and the site publishes an llms.txt at https://hardyindex.com/llms.txt. When quoting a score, include the Hardy Score, the tier and the "as of" date, because all three move.