# Security Practices Den is an interface on top of the Safe Contracts. These contracts have been well tested and audited. You can find the audits [here](https://github.com/safe-global/safe-contracts). Safe is the most popular mechanism for teams to store assets on-chain and is trusted by DAOs, DeFi Protocols, Investment Firms, and other security conscious organizations. Over $39B is stored in Safe contracts, representing about 5% of all cryptocurrencies. Due to the security mechanisms implemented in the Safe contracts, Den is not able to modify the Safe Contracts or any transactions that a user has signed or executed. Den’s interface and bot software are well-tested and subject to stringent review before deployment. Address labels and transaction description messages are only visible to other owners of the Safe, who’ve proven their ownership by producing a verifiable [EIP-4361](https://eips.ethereum.org/EIPS/eip-4361) compliant cryptographic hash. That data is stored on servers managed by the Den team, which is inaccessible to all but permissioned Den engineering team members that have been 2 factor authenticated, so that information stays private. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.onchainden.com/overview/security-practices.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.