# Global Dollar (USDG) Quantum Readiness Report

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

Evaluation date: 2026-06-05. Review status: draft. Evaluated scope: USDG stablecoin token across all deployed chains including the LayerZero OFT-bridged USDG0 variant. Evaluated under Token Inheritance (Section 7.2) with token-specific admin key and bridge dependency analysis..

Global Dollar (USDG) is a MAS-regulated USD-pegged stablecoin issued by Paxos Digital Singapore Pte. Ltd., deployed as a standard ERC-20/SPL token on Ethereum, Solana, Ink, and X Layer, with a LayerZero OFT-bridged variant (USDG0) extending to additional chains. As of the evaluation date, USDG has approximately $2.6B in total supply across all chains.

QRI Evaluation Result: Score 0/100 — Stage 0 (Unassessed / No Evidence).

USDG has no quantum readiness whatsoever. There is no public cryptographic inventory, no quantum threat model, no PQC or hybrid-signature support, no quantum migration roadmap, and no quantum-specific incident-response planning. Every critical cryptographic surface — user spend authorization (inherited from host-chain ECDSA/Ed25519), admin key operations (mint/burn/pause/freeze/upgrade via ECDSA multisigs and an EOA), and the LayerZero OFT bridge (classical DVN/relayer signatures) — remains entirely classical and quantum-vulnerable.

The token inherits the quantum risk profile of its host chains (Ethereum, Solana, Ink, X Layer) under the Token Inheritance rule (Section 7.2). Token-specific quantum-critical vulnerabilities include: (1) the DEFAULT_ADMIN 7-owner multisig and operational 3-of-7 multisig, both of which have executed on-chain transactions exposing their public keys to long-exposure quantum attack; (2) the SupplyControl admin EOA (0x3Af3...) which can add supply controllers with $500M–$1B mint capacities and has an exposed public key; and (3) the LayerZero OFT bridge whose DVN signer set relies entirely on classical cryptography.

Existing audits (Zellic, Trail of Bits, Halborn) cover classical smart-contract security only. No quantum-scoped audit exists. A $1M bug bounty program was launched on Cantina in March 2026. Confidence in the evaluation is High because the complete absence of quantum protection is verifiable from multiple primary sources (source code, documentation, mainnet deployment, explorer data, independent risk assessments).

## Core resources

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



## Evidence sources

- [Evidence source 1](<https://github.com/paxosglobal/usdg-contract>): Public source cited by the Global Dollar QRI assessment.
- [Evidence source 2](<https://docs.paxos.com/guides/stablecoin/usdg>): Public source cited by the Global Dollar QRI assessment.
- [Evidence source 3](<https://424565.fs1.hubspotusercontent-na1.net/hubfs/424565/USDGWhitePaper.pdf>): Public source cited by the Global Dollar QRI assessment.
- [Evidence source 4](<https://globaldollar.com>): Public source cited by the Global Dollar QRI assessment.
- [Evidence source 5](<https://etherscan.io/token/0xe343167631d89B6Ffc58B88d6b7fB0228795491D#code>): Public source cited by the Global Dollar QRI assessment.
- [Evidence source 6](<https://etherscan.io/token/0xe343167631d89B6Ffc58B88d6b7fB0228795491D>): Public source cited by the Global Dollar QRI assessment.
- [Evidence source 7](<https://github.com/yearn/risk-score/blob/master/reports/report/paxos-usdg.md>): Public source cited by the Global Dollar QRI assessment.
- [Evidence source 8](<https://gov.ethenafoundation.com/t/usdg-as-a-usde-backing-asset/782>): Public source cited by the Global Dollar QRI assessment.
- [Evidence source 9](<https://thedefiant.io/news/defi/paxos-labs-and-layerzero-launch-usdg0-for-cross-chain-stablecoin-transfers>): Public source cited by the Global Dollar QRI assessment.
- [Evidence source 10](<https://github.com/paxosglobal/paxos-token-contracts/blob/master/audits/>): Public source cited by the Global Dollar QRI assessment.