> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/server/reference/plugins/password-validation-plugins.md).

# Password Validation Plugins

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