# USDD (USDD) Quantum Readiness Report

> USDD has a QRI score of 1/100 and is assessed at Stage 0 (Unassessed / No Evidence) with high evidence confidence.

Evaluation date: 2026-06-06. Review status: draft. Evaluated scope: USDD stablecoin token across all deployed chains, including token-specific admin/governance keys and host-chain inherited risk.

USDD is a ~$1.4B market-cap stablecoin deployed as a standard TRC-20/ERC-20/BEP-20 token across TRON, Ethereum, and BNB Chain. It inherits the quantum vulnerability of all three host chains, each of which uses ECDSA secp256k1 for transaction signatures with no post-quantum protection in production. Additionally, USDD's minting authority, collateral custody, and protocol governance are controlled by the TRON DAO Reserve through a 5-of-7 multisig and classical admin contracts (DSPauseProxy, GovActionsProxy)—all secured by quantum-vulnerable ECDSA keys. Compromise of these keys would enable unlimited minting, collateral extraction, and protocol destruction. TRON announced a PQC initiative in April 2026, but as of the evaluation date no formal proposal, code, testnet, or documentation exists. USDD itself has published no cryptographic inventory, quantum risk assessment, or migration plan. QRI Score: 1/100 (Stage 0).

## Core resources

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



## Evidence sources

- [Evidence source 1](<https://usdd.io/>): Public source cited by the USDD QRI assessment.
- [Evidence source 2](<https://docs.usdd.io/>): Public source cited by the USDD QRI assessment.
- [Evidence source 3](<https://legacy-docs.usdd.io/usdd-issuance/usdd-issuance>): Public source cited by the USDD QRI assessment.
- [Evidence source 4](<https://developers.tron.network/docs/account>): Public source cited by the USDD QRI assessment.
- [Evidence source 5](<https://tronprotocol.github.io/documentation-en/mechanism-algorithm/account/>): Public source cited by the USDD QRI assessment.
- [Evidence source 6](<https://docs.usdd.io/introduction/collateral-asset-contract-addresses>): Public source cited by the USDD QRI assessment.
- [Evidence source 7](<https://llamarisk.com/research/archive-llamarisk-asset-risk-assessment-usdd>): Public source cited by the USDD QRI assessment.
- [Evidence source 8](<https://coinmarketcap.com/currencies/usdd/>): Public source cited by the USDD QRI assessment.
- [Evidence source 9](<https://defillama.com/stablecoin/usdd>): Public source cited by the USDD QRI assessment.
- [Evidence source 10](<https://reports.chainsecurity.com/DecentralizedUSD/ChainSecurity_DecentralizedUSD_USDDOnEthereumAndBSC_Audit.pdf>): Public source cited by the USDD QRI assessment.
- [Evidence source 11](<https://www.gncrypto.news/news/tron-adopt-nist-post-quantum-signatures-mainnet/>): Public source cited by the USDD QRI assessment.
- [Evidence source 12](<https://news.bitcoin.com/justin-sun-unveils-tron-post-quantum-plan-as-crypto-security-debate-grows/>): Public source cited by the USDD QRI assessment.
- [Evidence source 13](<https://crypto.news/justin-sun-sets-2026-timeline-for-tron-quantum-resistant-upgrade/>): Public source cited by the USDD QRI assessment.
- [Evidence source 14](<https://docs.usdd.io/developers/core-contracts/proxy-contract>): Public source cited by the USDD QRI assessment.