> For the complete documentation index, see [llms.txt](https://yudu-sentinel.gitbook.io/sentinel-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://yudu-sentinel.gitbook.io/sentinel-documentation/system-administration/system-users/user-profile/security.md). # Security Managing System User Security A system user's password and two-factor authentication can be managed via the profile security tab. All password and two-factor authentication changes trigger a security warning email to the user's primary email address. All passwords must follow the password rules shown below. {% hint style="warning" %} This area is restricted to users with permission: **System Admin** {% endhint %}