# Superstate Short Duration U.S. Government Securities Fund (USTB) (USTB) Quantum Readiness Report > Superstate Short Duration U.S. Government Securities Fund (USTB) has a QRI score of 2.75/100 and is assessed at Stage 1 (Quantum Risk Assessed) with medium evidence confidence. Evaluation date: 2026-06-05. Review status: draft. Evaluated scope: USTB token (ERC-20 on Ethereum/Plume, SPL Token-2022 on Solana) including admin/governance keys, AllowList, and redemption contracts. Inherits host-chain (L1/L2) QRI score per QRI §7.2.. Superstate USTB (~$741M–$988M AUM) is a tokenized U.S. Treasuries fund deployed as a standard ERC-20/SPL token on Ethereum, Solana, and Plume. It inherits the quantum vulnerability of all three host chains and adds token-specific risk through 4 EOA-controlled admin keys (no multisig, no timelock). The project has published zero quantum-specific work: no cryptographic inventory, no quantum threat model, no PQC migration roadmap, no prototype, and no mainnet PQ support. All spend authorization is classical ECDSA/Ed25519. The admin EOAs have exposed on-chain public keys, making them long-exposure quantum targets. On the positive side, Superstate maintains redundant off-chain ownership records and can forcibly burn/remint tokens, making the system PQ-Recoverable. The fund benefits from 11 classical security audits, formal verification, institutional-grade custody (BNY Mellon), and a strong legal structure (bankruptcy-remote Delaware Trust, SEC regulated). However, per QRI rules, recoverability and classical audit coverage do not raise the quantum readiness score. The QRI Score of 3 reflects the minimal credit earned — partial credit for the documented PQ-Recoverable recovery mechanism (Category 4) and the upgradeable proxy pattern (Category 5) — capped at 10 by the absence of a public cryptographic inventory. Quantum risk has been identified by third parties (Eternax.ai, Yearn risk report) but not formally assessed or acknowledged by the project itself. ## Core resources - [Superstate Short Duration U.S. Government Securities Fund (USTB) QRI report](https://qrindex.org/projects/superstate-short-duration-us-government-securities-fund-ustb/): Human-readable assessment with score, stage, evidence, blockers, risks, and assurance notes. - [Superstate Short Duration U.S. Government Securities Fund (USTB) structured report data](https://qrindex.org/projects/superstate-short-duration-us-government-securities-fund-ustb/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. - [Superstate Short Duration U.S. Government Securities Fund (USTB) official website](https://www.coingecko.com/en/coins/superstate-short-duration-us-government-securities-fund-ustb): Project-maintained website. ## Evidence sources - [Evidence source 1](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment. - [Evidence source 2](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment. - [Evidence source 3](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment. - [Evidence source 4](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment. - [Evidence source 5](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment. - [Evidence source 6](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment. - [Evidence source 7](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment. - [Evidence source 8](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment. - [Evidence source 9](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment. - [Evidence source 10](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment. - [Evidence source 11](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment. - [Evidence source 12](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment. - [Evidence source 13](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment. - [Evidence source 14](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment. - [Evidence source 15](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment. - [Evidence source 16](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment. - [Evidence source 17](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment. - [Evidence source 18](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment. - [Evidence source 19](): Public source cited by the Superstate Short Duration U.S. Government Securities Fund (USTB) QRI assessment.