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diff --git a/guides/source/configuring.md b/guides/source/configuring.md
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--- a/guides/source/configuring.md
+++ b/guides/source/configuring.md
@@ -487,6 +487,17 @@ Defaults to `'signed cookie'`.
authenticated encrypted cookie salt. Defaults to `'authenticated encrypted
cookie'`.
+* `config.action_dispatch.encrypted_cookie_cipher` sets the cipher to be
+ used for encrypted cookies. This defaults to `"aes-256-gcm"`.
+
+* `config.action_dispatch.signed_cookie_digest` sets the digest to be
+ used for signed cookies. This defaults to `"SHA1"`.
+
+* `config.action_dispatch.cookies_rotations` is set to an instance of
+ [RotationConfiguration](http://api.rubyonrails.org/classes/ActiveSupport/RotationConfiguration.html).
+ It provides an interface for rotating keys, salts, ciphers, and
+ digests for encrypted and signed cookies.
+
* `config.action_dispatch.perform_deep_munge` configures whether `deep_munge`
method should be performed on the parameters. See [Security Guide](security.html#unsafe-query-generation)
for more information. It defaults to `true`.