> For the complete documentation index, see [llms.txt](https://harpie.gitbook.io/welcome-to-the-harpie-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://harpie.gitbook.io/welcome-to-the-harpie-docs/tech-and-security/harpies-anti-theft-tech.md).

# Harpie's Anti-Theft Tech

For those curious about how Harpie works under-the-hood, here's a quick rundown of how we protect our users from crypto theft.

* **Background Check Engine:** We run regular scans of every Ethereum address, and we're able to find if it's involved in hacks, scams, money laundering, or any other illicit activity
* **Transaction Firewall:** We pre-screen transactions before they get sent out to the blockchain, which lets us prevent users from signing scam transactions.
* **Vault:** As a last line of defense, we're able to transfer vulnerable assets out of user wallets as soon as an attack is detected, using a trustless transfer system.

All of these features are opt-in and configurable via the Harpie dashboard.