If you want "public understanding of cryptography," then first you may need to remove a lot of the elitism, posturing, showing off and one-upmanship that surrounds almost any public discussion of cryptography (mostly coming from people who are actually not very knowledgeable). Otherwise the rest of the world will continue assume it is beyond them, not really worth understanding and is something for arrogant nerds to argue about in order to establish who is smarter.