This is a bit of a stretch of what the service does. You don't need to "register" to read messages. It OAuths you if you don't use the extension. People using the extension register through OAuth as well.
The email is encrypted before it is sent anywhere using AES 256 (GCM when available moving forward).
WhatsApp doesn't deal with email or file attachments as far as I knew to the same degree as something like gmail where we can handle ~150MB files and they handle ~30MB. I doubt most of these big companies want to migrate emails away from Outlook/Gmail and force all their external correspondence to be done via WhatsApp.
There's also rollout starting for support of customer managed keys and a bunch of things WhatsApp will probably take a long time to do, if ever, due to their consumer focus.
The email is encrypted before it is sent anywhere using AES 256 (GCM when available moving forward).
WhatsApp doesn't deal with email or file attachments as far as I knew to the same degree as something like gmail where we can handle ~150MB files and they handle ~30MB. I doubt most of these big companies want to migrate emails away from Outlook/Gmail and force all their external correspondence to be done via WhatsApp.
There's also rollout starting for support of customer managed keys and a bunch of things WhatsApp will probably take a long time to do, if ever, due to their consumer focus.
Disclosure: Work at Virtru