add entropy commit and reveal diagram (#857)

Author: nidhi-singh02

images/entropy/commit_and_reveal.png

@@ -1,3 +1,6 @@
+import Image from "next/image";
+import CommitRevealDiagram from "../../images/entropy/commit_and_reveal.png";
+
 # Protocol Design
 
 The Entropy protocol implements a secure 2-party random number generation procedure. The protocol
@@ -15,6 +18,15 @@ Honesty means that (1) they draw their value at random, and (2) for A, they keep
 step 4. Thus, neither party needs to trust the other -- as long as they are themselves honest, they can
 ensure that the result $r$ is random.
 
+<br />
+
+<Image
+  src={CommitRevealDiagram}
+  alt="Entropy Protocol Commit and Reveal Flow"
+  sizes="100%"
+  placeholder="blur"
+/>
+
 Entropy implements a version of this protocol that is optimized for on-chain usage. The
 key difference is that one of the participants (the provider) commits to a sequence of random numbers
 up-front using a hash chain. Users of the protocol then simply grab the next random number in the sequence.