This past weekend I was trying to solve a similar problem also with shared public keys. I was having trouble getting it to work for my needs the way I wanted, s

This past weekend I was trying to solve a similar problem also with shared public keys. I was having trouble getting it to work for my needs the way I wanted, so instead I am testing an approach of using large hash comparison based upon a preshared key. It’s a much higher grade of cryptographic reliability at a tiny fraction of the computational cost with many fewer parts to maintain.