# Chainlink (LINK) Quantum Readiness Report

> Chainlink has a QRI score of 4/100 and is assessed at Stage 1 (Quantum Risk Assessed) with low evidence confidence.

Evaluation date: 2026-06-01. Review status: draft. Evaluated scope: Chainlink decentralized oracle network, including OCR, CCIP, VRF, Data Feeds, node infrastructure, and LINK token (ERC-677/ERC-20 on Ethereum and bridged chains).

Chainlink scores 4/100 (Stage 1: Quantum Risk Assessed). The project has published an educational article acknowledging quantum threats to blockchain cryptography (February 2026), but has no formal cryptographic inventory, no PQC migration roadmap, no PQC design or prototype, and zero production PQC protection across any component. Every critical cryptographic layer — OCR oracle report signing (EdDSA/ECDSA), CCIP cross-chain messaging (classical signatures), VRF randomness (ECC), node P2P identity (secp256k1/Ed25519), and LINK token transfers (inherited Ethereum ECDSA) — remains entirely dependent on quantum-vulnerable classical cryptography. Chainlink secures over $90 billion in DeFi value and dominates ~68% of the oracle market, making its quantum vulnerability a systemic risk for the entire DeFi ecosystem. The project has strong operational security (SOC 2 Type 2, bug bounty, multiple audits) but none of these address quantum readiness. This evaluation covers the Chainlink oracle network, CCIP, VRF, Data Feeds, node infrastructure, and LINK token as of 2026-06-01.

## Core resources

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



## Evidence sources

- [Evidence source 1](<https://chain.link/article/quantum-safe-cryptography>): Public source cited by the Chainlink QRI assessment.
- [Evidence source 2](<https://research.chain.link/ocr3.pdf>): Public source cited by the Chainlink QRI assessment.
- [Evidence source 3](<https://docs.chain.link/architecture-overview/off-chain-reporting>): Public source cited by the Chainlink QRI assessment.
- [Evidence source 4](<https://docs.chain.link/ccip/architecture>): Public source cited by the Chainlink QRI assessment.
- [Evidence source 5](<https://docs.chain.link/vrf>): Public source cited by the Chainlink QRI assessment.
- [Evidence source 6](<https://github.com/smartcontractkit/chainlink>): Public source cited by the Chainlink QRI assessment.
- [Evidence source 7](<https://etherscan.io/token/0x514910771af9ca656af840dff83e8264ecf986ca>): Public source cited by the Chainlink QRI assessment.
- [Evidence source 8](<https://docs.chain.link/resources/link-token-contracts>): Public source cited by the Chainlink QRI assessment.
- [Evidence source 9](<https://blog.chain.link/how-chainlink-is-bringing-privacy-to-blockchains/>): Public source cited by the Chainlink QRI assessment.
- [Evidence source 10](<https://chain.link/security>): Public source cited by the Chainlink QRI assessment.
- [Evidence source 11](<https://github.com/code-423n4/2026-03-chainlink>): Public source cited by the Chainlink QRI assessment.
- [Evidence source 12](<https://www.ndss-symposium.org/wp-content/uploads/2026-f458-paper.pdf>): Public source cited by the Chainlink QRI assessment.