Specifically SHA512 he said, dont use SHA1 or SHA256 thats not good enough. And he explained several times how the security solution work, it would be based on reversing a hash function. As I shrugged it off, people say weird things sometimes, and offered a real solution he kept pushing for his solution. Weird but anyway maybe he just means what I mean but is using different words, so I implement a real solution, and then days later he questions my judgement and the solution because I didnt use his. Thats when I said "you cant reverse a hash function, in fact thats the point of it" and then point to the diagram he made see there, thats not mathematically possible. His title was Security Architect.