One possible public key is zeroes + public fingerprint. If I remember correctly diffie-helman is based on multiplications , so maybe finding the private key is

One possible public key is zeroes + public fingerprint. If I remember correctly diffie-helman is based on multiplications , so maybe finding the private key is now equivalent to finding the private key of a 40 chat public key, which may be doable. I'm probably wrong on the details here , but there's probably some math tricks you could use to more easily find some private, public key pairs that end with the fingerprint.