  We live in a generation where the world around us is witnessing technological
revolutions every single day, and as a result of this, everything around us is
getting digitized with the touch of technology. In order to keep up the pace of
this technological revolution and help reaching this progress its zenith, one
of the most important aspects that needs to be taken care of is security. One
of the biggest boons of technology in the recent times has been the invention
of smartphones. As smartphones started becoming more popular, affordable and
easily accessible, hundreds of free messaging applications were launched, but
WhatsApp emerged as the ultimate winner in the race. This paper describes one
of the most important and popular features of WhatsApp, the End-to-End (E2E)
encryption system, which sets it apart from most other messaging applications
and is one of the reasons which helped it become so popular.
