diff --git a/blog/posts/privacy-pass.md b/blog/posts/privacy-pass.md
index 724c4cf7..dba01ef0 100644
--- a/blog/posts/privacy-pass.md
+++ b/blog/posts/privacy-pass.md
@@ -46,6 +46,16 @@ We're still falling short in a major area though.
 
 Current smartphones are non-upgradeable by their owners and can't be built from scratch like a desktop computer can. They also contain lots of black-box proprietary code. Even a Google Pixel, the gold standard of Android smartphone freedom that allows you to install your own operating system securely, still suffers from the same pitfalls.
 
+### Cryptography
+
+How do we ensure the psuedonyms can't be linked together? We already use cryptography to protect our communications; here Chaum presents ways to protect unlinkability in a similar way using cryptography.
+
+>Simple mathematical proofs show that, with appropriate use of the systems, even conspiracy of all organizations and tapping of all communication lines cannot yield enough information to link the pseudonyms-regardless of how clever the approach is or how much computation is expended.
+
+## Types of Transactions
+
+### 
+
 ## Problems
 
 Services that don't require an account or payment to use are great; you can use them with Tor, clear your browser history, whatever you need to do to keep your activity private.