diff --git a/content/gpg.haml b/content/gpg.haml
index 5e51f36..3621ba5 100644
--- a/content/gpg.haml
+++ b/content/gpg.haml
@@ -6,6 +6,10 @@ title: GPG Public Key
 
   More info about my public key: <a href="http://keys.gnupg.net/pks/lookup?search=0xF713697B&op=vindex">0xF713697B</a>
 
+  ## Want to know more about GPG?
+
+  Check out the slides of my talk [Gnu Privacy Guard and You](https://speakerdeck.com/ariejan/gnu-privacy-guard-and-you-math-version)
+
   ## Proof of identity
 
   As far as you can trust this website, this is a proof of my identity.