How is my Viber account secured and encrypted?
What security does Viber offer?
Which devices have Viber's security?
Is my desktop or tablet secured?
How does end-to-end security work?
What do the lock icons mean?
What is authentication?
How do I authenticate?
Are my group chats also encrypted?
What security does Viber offer?
Viber's commitment to user privacy and security is reflected in our addition of the latest in encryption technology to the service.
This upgrade brings an additional layer of protection to reassure all users that Viber provides safety from third parties at the highest possible standards.
End-to-end security means that data (messages, photos, videos, voice and video calls) is encrypted the moment it is sent from one device until the moment it is received by the intended recipient. No middle man - not even Viber.
Read Viber's Security White Paper.
Viber for iOS or Android 6.0 or later
Viber for Desktop 6.0 or later
Viber for Windows 10
Note that Viber for Windows Phone 8 will not support the new security features. It will continue to secure calls and messages through standard encryption methods.
In order for security to be supported across all your devices, your PC or tablets will require an update. Once you have updated your Android, iPhone, or Windows 10 device, the following will occur on other devices running Viber with the same account:
Viber for Windows 8 - Will no longer be supported
Viber for Desktop - Will require you to update
Viber for Android tablet - Will require you to update
Viber for iPad - Will require you to update
Yes, as long as you are running version 6.0 or later. You will be required to update Viber in order to use your desktop or tablet.
Upgrading is quick and easy! Follow the steps below:
1. Make sure that you have your mobile device with you
2. Open Viber on your desktop or tablet
3. You will be prompted to scan a bar code with your phone:
4. Select "Scan with my phone"
5. Your device QR code scanner will open
6. Use the scanner to scan the code on your screen
Please note that in the time between upgrading your mobile device and upgrading your other device(s), messages will not sync between them. This would be a breach of security.
With end-to-end security encryption all Viber users can rest assured that they are the only people who are able to read each other’s messages or hear their conversations. Viber's security technology requires two devices to communicate using a secret code instead of plain, understandable text.
Only the device sending the message and the device receiving the message has the key to decipher the code. No middle man - not even Viber - is able to read and understand the code. Thus, anyone trying to hack or spy on these communications is unable to and their efforts to hack the code will be futile.
A lock icon in each chat info screen indicates the level of encryption between you and the Viber user that you are communicating with.
No icon: the conversation is not using the latest end-to-end encryption technology because the Viber user you are communicating with is not using a Viber version that supports it.
Gray Icon: The conversation is encrypted using the updated end-to-end encryption technology.
Green Icon: The conversation is encrypted. Additionally, you and the other Viber user(s) have verified one another through an authentication process.
Red Icon: The conversation is encrypted with a user that you have previously verified through an authentication process; however, there may have been a breach in the established authentication.
A note on message security: Make sure that you are the only person with physical access to your device to ensure the privacy of your messages. Messages are secured in transit. Once a message has arrived to the recipient, it is no longer encrypted on the device itself and anyone who is in physical possession of your device will be able to read your messages.
I no longer see the grey lock icon in my chat!
The security icons are now located in your chat's info screen.
If you don't see an icon there - it means the recipient of your message OR one or more of the participants in a group chat is no longer running the most up-to-date version of Viber. The conversation is no longer encrypted using the upgraded encryption methods, but is still secured.
When any of your communications contain private or sensitive information, we recommend that all users upgrade to the latest version.
What is authentication?
Authentication is an additional element of Viber's new security features. It is used to define who you trust and verify their identity.
Authentication tells Viber that you verify that the person you are communicating with is who they say they are and that the phone number connected to Viber is in the right hands.
For example: you have verified Joe through the authentication process and Joe loses his phone. He buys a new phone and installs Viber on it with the same phone number. Because Joe's device has changed, the next time you two communicate, Viber will alert you that something has changed and that you should verify again that you are actually speaking with Joe.
Authentication of a contact can only occur during a Viber call with the contact.
To authenticate a contact, follow these instructions:
1. Open the chat info screen with the user you want to authenticate
2. Select "Trust this contact"
3. Choose “Free Viber Call”
4. During the Viber call you both must click on the lock icon
5. Read the code to each other and confirm that the code is the same
6. Click on "Trust this contact"
7. The lock icon will turn green to confirm successful authentication
A group chat will only use the upgraded security methods if all group participants are using the upgraded version of Viber.
If not all participants are running upgraded versions of Viber, the group's messages will still be secured using the previous encryption techniques. Once all group participants are using the upgraded version of Viber, a gray lock icon will be displayed.
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