Yes, the Coursera title was "Cryptography I", so I was expecting another part, but ten years after, I still do not see any. A great course anyway.

There's a running joke among cryptographers that Dan will release Crypto II next semester =)

Yes that is a lesson I took from it, I'm not sure if it was this class or another one that showed how crypto on a computer could be defeated by monitoring its power consumption while checking a password. Even though the code knew to wait a set amount of time whether or not the password was correct, it wasn't drawing any power after the first incorrect digit allowing attackers to workout the correct digits one at a time.