Too Long; Didn't Read
The need for encryption algorithms is a must for most messaging applications like WhatsApp and Messenger. End-to-end encryption is an interesting piece of technology that simply works by scrambling the data communicated to prevent third-party or hackers from accessing the data while it is transmitted from one point to another point (device) The prime hallmark of this encryption is nobody in the middle (the application provider, Internet service provider or hacker) can decrypt it. Encryption of text messages may be common, but it's a whole different story when it comes to files, videos, images, video/audio calls.