Today we covered bitcoin in my applied cryptography class. The class covers, in order: 1) secure messaging 2) e-cash 3) bitcoin 4) various advances in applied cryptography. Student, as we finish Bitcoin, " isn't there no privacy?"

@gladstein If I did really well, they will also ask: wait, if there are a bunch of different folks issuing private e-cash on Bitcoin, don't you end up with a privacy problem just by leaking who issued your coins?