diff --git a/util/keys/key.go b/util/keys/key.go
index 3f1c9f2e..150d0897 100644
--- a/util/keys/key.go
+++ b/util/keys/key.go
@@ -3,6 +3,8 @@ package keys
 import "crypto/subtle"
 
 type Key interface {
+	Equals(Key) bool
+
 	Raw() ([]byte, error)
 }