diff --git a/pgpainless-core/src/main/kotlin/org/pgpainless/decryption_verification/MessageMetadata.kt b/pgpainless-core/src/main/kotlin/org/pgpainless/decryption_verification/MessageMetadata.kt
index 4e0260c1..fd26883a 100644
--- a/pgpainless-core/src/main/kotlin/org/pgpainless/decryption_verification/MessageMetadata.kt
+++ b/pgpainless-core/src/main/kotlin/org/pgpainless/decryption_verification/MessageMetadata.kt
@@ -322,12 +322,18 @@ class MessageMetadata(val message: Message) {
     fun isVerifiedDetachedSignedBy(keys: PGPKeyRing) =
         verifiedDetachedSignatures.any { keys.matches(it.signingKey) }
 
+    fun isVerifiedDetachedSignedBy(cert: OpenPGPCertificate) =
+        verifiedDetachedSignatures.any { cert.pgpKeyRing.matches(it.signingKey) }
+
     fun isVerifiedInlineSignedBy(fingerprint: OpenPgpFingerprint) =
         verifiedInlineSignatures.any { it.signingKey.matches(fingerprint) }
 
     fun isVerifiedInlineSignedBy(keys: PGPKeyRing) =
         verifiedInlineSignatures.any { keys.matches(it.signingKey) }
 
+    fun isVerifiedInlineSignedBy(cert: OpenPGPCertificate) =
+        verifiedInlineSignatures.any { cert.pgpKeyRing.matches(it.signingKey) }
+
     // ##########################################################################################################
     //                                             Literal Data
     // ##########################################################################################################