Can you point to a flaw in the cryptography? Otherwise, while I understand where you're coming from I think your criticism is misguided. Cryptography is very interesting and is fun to implement. It is also difficult to get right. Does that mean hobbyists shouldn't implement it? No, it just means that you shouldn't expect security from hobbyist implementations. I find it disconcerting to see comment after comment on HN tearing people down for working on projects that interest them.

The point of criticism is to help people improve. By effectively saying, "You're not cut out for crypto, don't even bother," you do a disservice to others and contribute negativity that HN doesn't need.