Re:There is no WhatsApp 'backdoor'
by rndgermandude on Friday January 13, 2017 @07:50PM
(#13396110)
One checkmark = message delivered /
Double checkmark = somebody read it. That somebody might as well be WhatApp doing a MITM
The double checkmark stuff the blog talks about just means you cannot retroactively rekey already sent (old) messages. WhatApp inserting itself as a MITM can however read (and double checkmark) and new messages after they did the MITM rekeying
It is actually slightly different. One checkbox means received by WhatsApp, two checkboxes means received by the recipient and two blue checkboxes means read by the recipient.
> once you see a warning, you could just delete all messages that don't have the double checkmark
No, as it stands, they are automatically (without user intervention) re-encrypted and re-sent.
Assuming you have the notification on (Which anyone who cares about security could and should turn on), once you see a warning, you could just delete all messages that don't have the double checkmark (if any) and not send new ones.