Audit firm tier

USDD (Decentralized USD)'s assessment for RD-F-005 — scored yellow on the v1.7.0 rubric. The evidence below is the curator's reasoning for this score.

Evidence summary #

ChainSecurity is Tier-2 (established, named firm with public track record). CertiK is Tier-2. Neither is Tier-1 (Trail of Bits / OpenZeppelin / ConsenSys Diligence / Certora / Sigma Prime / Spearbit / Zellic per taxonomy). Yellow: Tier-2 only, no Tier-1 firm engagement confirmed.

Sources #

Audit
ChainSecurity - public audit firm profileChainSecurity firm identity - Tier-2 established audit firmretrieved 2026-05-17
Internal
audit-firms.json tier classificationCurator-maintained audit firm tier registry in risk-dashboard/scripts/data-pipeline/audit-firms.jsonretrieved 2026-05-17

Methodology #

Classify each auditing firm into: Tier-1 (Trail of Bits / OpenZeppelin / ConsenSys Diligence / Certora / Sigma Prime / Spearbit / Zellic) / Tier-2 (established, named firm with public track record) / boutique / unknown.

See the full factor methodology and distribution across all protocols →

rubric_version v1.7.0 protocol usdd factor RD-F-005 score yellow collected_at 2026-05-17 11:34:18