> For the complete documentation index, see [llms.txt](https://docs.prophaze.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.prophaze.com/detection-techniques/negative-security-model.md).

# Negative Security Model

Prophaze WAF supports the following Negative security model

* Signature-based -  Detect attacks by performing a string or a regular expression match against traffic.
* Rule-based -  Rules are similar to signatures but allow for a more complex logic to be formed (e.g. logical AND, logical OR). They also allow for specific parts of each transaction to be targeted in a rule.