# Tether Gold (XAUT) Quantum Readiness Report

> Tether Gold has a QRI score of 1.6/100 and is assessed at Stage 0 (Unassessed / No Evidence) with high evidence confidence.

Evaluation date: 2026-06-05. Review status: draft. Evaluated scope: Tokenized Asset (ERC-20 / TRC-20) including admin/governance keys.

Tether Gold (XAUT) is a tokenized physical-gold asset deployed as an ERC-20 token on Ethereum (primary), TRC-20 on TRON, and BEP-20 on BNB Chain. XAUT has published no quantum risk assessment, cryptographic inventory, migration roadmap, or PQ protection of any kind. As a standard smart-contract token, XAUT inherits the quantum vulnerability of its host chains for user transactions, but the critical independent finding is that the Tether Multisig (a 3-of-6 ECC-based custom MultiSigWallet) controls all privileged functions — mint, burn, proxy upgrade, blacklist, ownership transfer — and its signers' public keys are permanently exposed on-chain through executed transactions. A quantum adversary who recovers any 3 of 6 signer private keys can mint unlimited unbacked XAUT, upgrade the proxy to steal funds, or destroy the token's value entirely. This represents a quantum-critical vulnerability affecting the full ~$2.7B supply, independent of any host-chain migration timeline. The QRI Score of 1.6 reflects near-total absence of quantum readiness: no project-led assessment (Stage 0), no production cryptographic protection, negligible migration coverage (only a theoretical proxy upgrade path), and no published algorithmic assurance work.

## Core resources

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



## Evidence sources

- [Evidence source 1](<https://gold.tether.to/>): Public source cited by the Tether Gold QRI assessment.
- [Evidence source 2](<https://tether.io/news/xaut-update-upgrade-completed/>): Public source cited by the Tether Gold QRI assessment.
- [Evidence source 3](<https://etherscan.io/token/0x68749665ff8d2d112fa859aa293f07a622782f38>): Public source cited by the Tether Gold QRI assessment.
- [Evidence source 4](<https://etherscan.io/address/0xc6cde7c39eb2f0f0095f41570af89efc2c1ea828>): Public source cited by the Tether Gold QRI assessment.
- [Evidence source 5](<https://governance.aave.com/t/arfc-add-xaut-to-aave-v3-core-instance/22385/3>): Public source cited by the Tether Gold QRI assessment.
- [Evidence source 6](<https://coinmarketcap.com/currencies/tether-gold/>): Public source cited by the Tether Gold QRI assessment.
- [Evidence source 7](<https://etherscan.io/address/0x68749665ff8d2d112fa859aa293f07a622782f38>): Public source cited by the Tether Gold QRI assessment.