diff --git a/Trust and Certification Model.md b/Trust-and-Certification-Model.md
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+### Key Confirmations
+
+see https://github.com/open-keychain/open-keychain/blob/development/OpenKeychain/src/main/res/raw/help_certification.html
+
 ### Trust
 * We use a simplified trust model: Exactly all certificates issued by a key for which the secret key is available are trusted.
 * We do not support "trust signatures" because they are rarely used and complex to implement.