Beam is incorporating a BBS system that presumably could be used for secure communications as well (ow how could it be secure for setting up a tx?). Won't Grin

Beam is incorporating a BBS system that presumably could be used for secure communications as well (ow how could it be secure for setting up a tx?). Won't Grin have to do something similar that would support secure messaging in order for users to build txs in a secure and easy way?