In this scheme we put forward the concept of matrix pool on which our key predistribution scheme is upbuilt,and encrpytion scheme is introduced into the process of key transfer.
One of NIST's approved lattice-based algorithms, MLChem, is a method for distributing secret encryption keys, which allow the right recipient to decrypt the scrambled data.
They simply create accounts on ProtonMail, which is quite simple and takes a few moments, and all the key encryption and generation is happening automatically in the background as Bob is creating his account.
So the data stream is encrypted, using an encryption tool called Transport Layer Security, or TLS. Your machine and the other machine are both given a one-time key for decoding that encryption.