# Password Validation Plugins

- [Password Validation Plugin Overview](https://mariadb.com/docs/server/reference/plugins/password-validation-plugins/password-validation.md): General introduction into plugins that enforce specific security policies and complexity rules for user passwords.
- [Cracklib Password Check Plugin](https://mariadb.com/docs/server/reference/plugins/password-validation-plugins/cracklib-password-check-plugin.md): The Cracklib Password Check Plugin enforces password strength by validating new passwords against the CrackLib library and its dictionary.
- [Password Reuse Check Plugin](https://mariadb.com/docs/server/reference/plugins/password-validation-plugins/password-reuse-check-plugin.md): The Password Reuse Check Plugin prevents users from reusing previous passwords, with a retention policy controlled by the password\_reuse\_check\_interval variable.
- [password\_reuse\_check\_interval Variable](https://mariadb.com/docs/server/reference/plugins/password-validation-plugins/password_reuse_check_interval.md): This system variable defines the retention period in days for the password history used by the Password Reuse Check Plugin to prevent reuse.
- [Simple Password Check Plugin](https://mariadb.com/docs/server/reference/plugins/password-validation-plugins/simple-password-check-plugin.md): The Simple Password Check Plugin enforces basic password complexity rules, such as minimum length and required numbers of digits, letters, and special characters.


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