The breach may simply mean that a user has changed their primary phone however, it can also indicate a man-in-the-middle-attack.

Red Lock: If there is a problem with the authentication key of a previously trusted user, the padlock will turn red.

Tapping on the green padlock will display a tooltip letting users know that messages sent by the participants are encrypted and your contact is verified. This means that the selected contact’s authentication key will be monitored for future changes so users can be certain that they’re talking to the right person at all times.

Green Lock: Users also have the option of manually authenticating their contacts by selecting that they are ‘trusted’.

Tapping on this icon will display a tooltip letting users know that messages sent by the participants are encrypted.

Grey Lock: During an end-to-end encrypted conversation and call users will see a grey padlock icon.Users will see a color-coded lock on the right hand side of the screen indicating the level of security: Users who are also using Viber on an iPad, Android tablet or desktop will be prompted to re-connect it to their phone using a QR code.Īll communications can benefit from an additional layer of security through account verification. Rolling out globally over the coming weeks, users will automatically be protected by end-to-end encryption in all communications on their smartphone once they have upgraded to the latest version of Viber – v6.0 or higher.

We will continue to make this an ongoing priority as digital communication evolves.” Full End-to-end encryption “Because of this, we have spent a long time working on this latest update to ensure that our users have the most sophisticated security available and maximum control over their communications.

“We take our users’ security and privacy very seriously, and it’s critical to us that they feel confident and protected when using Viber,” said Michael Shmilov, COO of Viber.

What is viber trusted contacts