Fixed #22310 -- Documented exact usage of SECRET_KEY
Thanks to Tim Graham for the review.
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@ -2004,6 +2004,29 @@ Django will refuse to start if :setting:`SECRET_KEY` is not set.
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security protections, and can lead to privilege escalation and remote code
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execution vulnerabilities.
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The secret key is used for:
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* All :doc:`sessions </topics/http/sessions>` if you are using
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any other session backend than ``"django.contrib.sessions.backends.cache"``,
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or if you use
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:class:`~django.contrib.auth.middleware.SessionAuthenticationMiddleware`
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and are using the default
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:meth:`~django.contrib.auth.models.AbstractBaseUser.get_session_auth_hash()`.
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* All :doc:`messages </ref/contrib/messages>` if you are using
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:class:`~django.contrib.messages.storage.cookie.CookieStorage` or
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:class:`~django.contrib.messages.storage.fallback.FallbackStorage`.
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* :doc:`Form wizard </ref/contrib/formtools/form-wizard>` progress when using
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cookie storage with
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:class:`django.contrib.formtools.wizard.views.CookieWizardView`.
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* All :func:`~django.contrib.auth.views.password_reset` tokens.
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* All in progress :doc:`form previews </ref/contrib/formtools/form-preview>`.
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* Any usage of :doc:`cryptographic signing </topics/signing>`, unless a
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different key is provided.
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If you rotate your secret key, all of the above will be invalidated.
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Secret keys are not used for passwords of users and key rotation will not
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affect them.
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.. setting:: SECURE_BROWSER_XSS_FILTER
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SECURE_BROWSER_XSS_FILTER
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