After Edward Snowden case, the entire world became highly concerned about mobile app security and user data privacy. Especially it concerns mobile messengers with multiple user communications, data views, hacks, and so on.
For example, in 2016 WhatsApp popular messenger decided to fully encrypt the app and provide the complete protection by adding the end-to-end encryption (E2EE).
A bit later Viber also came to E2EE implementation, making it impossible for anyone (including themselves) to even view user information.
End-to-end is the system, in which devices transmit encrypted information to each other without third-party participation. Thus, the communication is direct, there are no intermediaries, and all the information, involving messages, calls, images, and video, is completely encrypted. Only those users who participate in the chat (one-to-one chats, group chats) will be able to read the messages.
It is based on public key encryption, working based on two keys - public and private. The first key (public) is used for encrypting messages and the second (private) - for their decryption.
An advantage is that a public key can be freely distributed, so everyone to whom a user gives your public key, can send an encrypted message. And since only he / she has a private key, only he / she can decrypt a message.
Find out more about E2EE and the ways to successfully encrypt a mobile app.
Whatsapp adds end to end encryption
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