diff --git a/OpenPGP-Security.md b/OpenPGP-Security.md
index 3046de0..ee457a4 100644
--- a/OpenPGP-Security.md
+++ b/OpenPGP-Security.md
@@ -116,10 +116,8 @@ Currently, a very simple password meter is shown in the key creation wizard to e
 
 Studies have shown that password meters can indeed encourage the selection of better passwords:
   * ["How Does Your Password Measure Up? The Effect of Strength Meters on Password Creation."](https://www.usenix.org/system/files/conference/usenixsecurity12/sec12-final209.pdf)
-  * "Does my password go up to eleven?: the impact of password meters on password selection"
-  * https://blogs.dropbox.com/tech/2012/04/zxcvbn-realistic-password-strength-estimation/
-
-Also interesting: [Carnegie-Mellon’s 2011 study](http://cups.cs.cmu.edu/rshay/pubs/passwords_and_people2011.pdf) concluded that length was the only thing that really influences password strength.
+  * ["Does my password go up to eleven?: the impact of password meters on password selection"](http://research.microsoft.com/jump/192108)
+  * [Carnegie-Mellon’s 2011 study](http://cups.cs.cmu.edu/rshay/pubs/passwords_and_people2011.pdf) concluded that length was the only thing that really influences password strength.
 
 ### Decrypt/Verify Cases