It's possible to require your users to create strong passwords that are difficult to crack. You can stipulate a minimum length for user passwords as well as combinations of alpha, numeric, and special characters.
Editing Password Requirements is done on the Client Settings page.
1. Go to Menu > Preferences > Client Settings
2. On the Account Settings page, click the Edit Password Requirements link in the Account Settings section of the form.
3. The password requirements page will load.
4. Fill out the settings and click the Submit button.