Hightlight message verifier in the release notes [ci skip]

1 files changed, 11 insertions, 0 deletions

diff --git a/guides/source/4_1_release_notes.md b/guides/source/4_1_release_notes.md
index 99d2a8c117..b3cd560de0 100644
--- a/guides/source/4_1_release_notes.md
+++ b/guides/source/4_1_release_notes.md
@@ -124,6 +124,17 @@ See
 [active_record/enum.rb](https://github.com/rails/rails/blob/4-1-stable/activerecord/lib/active_record/enum.rb#L2-L42)
 for a detailed write up.
 
+### Application message verifier.
+
+Create a message verifier that can be used to generate and verify signed
+messages in the application.
+
+```ruby
+message = Rails.application.message_verifier('salt').generate('my sensible data')
+Rails.application.message_verifier('salt').verify(message)
+# => 'my sensible data'
+```
+
 Documentation
 -------------