Signal

Signal is the instant messaging application that provides the highest level of security available on the market today. It will also enable users to transmit audio messages, images, and other data, much like the other applications of this kind, as well as make voice calls, video calls, and other types of calls. It has the same functionality as WhatsApp or Telegram, but with an additional layer of security.

Signal prioritizes users' privacy as one of its primary design goals. Signal uses an end-to-end encryption system called Whispers Systems, which ensures that communications leave the mobile device having already been encrypted, and that they are only decrypted after they have been received by the device belonging to the intended receiver. Because of this, even if they are stolen or intercepted while being delivered, no one will be able to read them.

Another new feature of Signal is the ability to arrange the auto-delete of messages you send after a certain time period, ranging from 5 seconds to a week. Users acquainted with WhatsApp will have no trouble picking up Signal, as it has a lot of design cues with the popular instant messaging program. After downloading it, all you need to do is agree to the licensing terms and grant permission for it to access your contacts. The app's servers will encrypt your data, but you'll need to set up a security PIN to access your account.