Recently, ChainSecurity, a well-known Web3 security auditing firm, released a security audit report on the decentralized stablecoin USDD. This marks the fifth security audit conducted since USDD's full upgrade to USDD 2.0 in January 2025. The report states that USDD demonstrates a high level of security in both token integration and application mechanisms. The release of this audit report further confirms USDD's leading advantages in smart contract security and asset solvency. As a highly regarded stablecoin project in the DeFi field, USDD consistently prioritizes security, and the five audits conducted by top-tier institutions demonstrate its strong ability to ensure the safety of user assets.

USDD is a decentralized stablecoin that employs an overcollateralized decentralized architecture and introduces a well-validated collateralized debt position model, allowing users to mint it using a variety of collateral. Recently, its deployment has expanded to Ethereum and BNB Chain, not only improving its cross-chain availability and liquidity but also providing more users with convenient access channels.

This fifth audit, conducted by ChainSecurity, focused on the on-chain deployment of USDD on Ethereum and BNB Chain. The report shows that USDD's codebase demonstrates a high level of security, with high security in related areas such as token integration, contingency mechanisms, and deficit auctions, as well as in general areas such as event handling and documentation, further enhancing the reliability of the multi-chain deployment.

Previously, USDD had completed four audits conducted by leading industry institutions ChainSecurity and CertiK, all of which received high praise.

In its previous audit report on the USDD smart contract, ChainSecurity stated that its asset solvency security is high, and functional correctness and access control have been significantly improved. The codebase as a whole provides a satisfactory level of security, with only some informational issues such as event handling and precision calculations remaining for further optimization. The team has resolved key issues and accepted the risk of governance delays, emphasizing the need for continuous monitoring to ensure the oracles and governance function properly.

Subsequently, in another audit of USDD, ChainSecurity reaffirmed that the security level of its codebase was satisfactory, and that there were no major vulnerabilities after functional and access control optimizations. The report emphasized that continued optimization and improvements will further enhance security.

Furthermore, ChainSecurity's audit of the exchange's smart contract emphasized that the contract supports a one-way 1:1 exchange between the old TRC-20 USDD and the new USDD. The audit covered asset redemption, functional correctness, and access control, demonstrating high security with no vulnerabilities found. The report also concluded that its codebase exhibited a high level of security.

In September of this year, CertiK, a well-known security firm, updated its audit of the Ethereum version of USDD. The report emphasized that the overall code functionality was complete and did not affect platform security, demonstrating the high security standards of USDD's deployment on Ethereum.

These audit findings consistently demonstrate that USDD performs exceptionally well in key areas such as asset security, functional accuracy, and access control, with no major vulnerabilities found that could lead to financial losses or system crashes. The rigorous assessments by ChainSecurity and CertiK, authoritative bodies in the blockchain security field, further strengthen the community's confidence in USDD.

Currently, USDD is listed on TRON, Ethereum, and BNB Chain, with its total circulating supply steadily increasing. On October 6th, USDD also launched its interest-bearing token, sUSDD, providing users with stable and diversified yield options, achieving a TVL exceeding $21 million within three weeks. USDD's rapid multi-chain expansion demonstrates its commitment to decentralized finance. In the future, USDD will continue to explore more on-chain opportunities, providing reliable stablecoin solutions for users worldwide.

For more details, please visit the USDD website ( https://docs.usdd.io/security/audits ) to view the full audit report.