Me kahi protocol encryption ikaika (E2EE), ʻo ke kamaʻilio ʻana me Berty e like me ka mea hiki (ʻaʻohe leka uila a i ʻole helu kelepona e koi ʻia, me ka liʻiliʻi o ka metadata). Hoʻolālā ʻia ka noi e hana ʻoiai me ka ʻole o ka pūnaewele a me ka ʻole o kahi kāleka SIM, ma o kahi pūnaewele puʻupuʻu. He mea paahana kamaʻilio anti-surveillance ʻo Berty a paʻakikī loa ka hoʻopaʻa ʻana.