diff --git a/unit06_trust_dig_cert/lab/README.MD b/unit06_trust_dig_cert/lab/README.MD
index 5bdaf1e..25cbd8d 100644
--- a/unit06_trust_dig_cert/lab/README.MD
+++ b/unit06_trust_dig_cert/lab/README.MD
@@ -25,6 +25,7 @@ Open up Certificate 1 and identify the following:
 * What is O used for:
 * What is L used for:
 
+The public key should be "30818902 ... 203010001". This is a DER format, and we can examine by pasting into this DER analyser [here](https://asecuritysite.com/digitalcert/sigs3). Using this, what do the two values represent, and what type of public key is it?
 
 
 ### A.2