diff --git a/BurnOutSharp/ProtectionType/CrypKey.cs b/BurnOutSharp/ProtectionType/CrypKey.cs
index 9306575d..ece73b57 100644
--- a/BurnOutSharp/ProtectionType/CrypKey.cs
+++ b/BurnOutSharp/ProtectionType/CrypKey.cs
@@ -3,5 +3,8 @@
     public class CrypKey
     {
         // TODO: Implement - http://www.crypkey.com/products/cdlock/cdmain.html
+
+        // https://github.com/horsicq/Detect-It-Easy/blob/master/db/PE/CrypKey%20Installer.1.sg
+        // https://github.com/horsicq/Detect-It-Easy/blob/master/db/PE/CrypKey.2.sg
     }
 }