The challenge here is that it's super-easy to design protocols that the average person would consider 100% secure, even after reading some documentation. It's t

The challenge here is that it's super-easy to design protocols that the average person would consider 100% secure, even after reading some documentation. It's the same problem where anyone can create a lock/encryption that they don't know how to break, but there's always someone smarter or better versed in breaking it. Subtle bugs don't look like problems until someone figures out an exploit against them.