Payload sizes irrelevant validation checks themselves can be readily publicly distributed how do you know which one? with the a priori key exchange / Out-o

Payload sizes irrelevant validation checks themselves can be readily publicly distributed how do you know which one? with the a priori key exchange / Out-of-Band communication? distributed with media backdoor/spoofable/resignable >separate postal mailing finally, full circle. PKI leverages OOB comms such that a single OOB exchange can validate an entire further chain of messages. yes, hashing hashes and bloom filters arent novel. ultimately, the only solution we have so far is: https://en.wikipedia.org/wiki/Diffie%E2%80%93Hellman_key_exchange#Public_key https://en.wikipedia.org/wiki/Diffie%E2%80%93Hellman_key_exc...