Viber accounts security and encryption
Viber's security measures
How does end-to-end encryption work?
Platforms covered by Viber's end to end encryption
Keep your chats secure
Secure Viber for desktop or on a tablet
Check the secure status of a chat
Trust a contact
Encryption for group chats
As part of our commitment to user privacy and security, all chats on Viber are secured by end-to-end encryption.
End-to-end encryption means that data (all types of messages, photos, videos, voice and video calls) is encrypted (or scrambled) the moment it is sent from one device until it reaches the intended recipient. This data can't be picked up in the middle by anyone else, not even Viber.
We don't store any chat information on our servers once it has been delivered to the recipient. If there is a problem delivering the message, it will remain encrypted until the receiver gets it, and disappear from the server once it has been delivered.
We can't share what we don't have with anyone else, even our parent company Rakuten. You won't start seeing ads related to something you were just talking about with a friend on Viber.
Read Viber's Security White Paper
With end-to-end encryption, only the people involved in a conversation can read the messages or hear the calls exchanged between them. This includes both 1-on-1 and group chats.
Viber's security technology creates an environment where two devices communicate using a secret code instead of plain, understandable text. Only the device sending the message and the device receiving the message have the key to decipher the code. Not even Viber can read and understand this code, and anyone who tries to hack or spy on this communication will not be able to understand it.
iOS/ Android - version 6.0 and newer
Desktop - version 6.0 and newer
Windows 10 - all versions
If you are using an old version of Viber on a different platform your conversations are not secured with end-to-end encryption.
Check your Viber version to make sure that it is one of these versions or later.
Make sure you have maximum protection on Viber:
Always update your app when a new version comes out. End-to-end encryption is only guaranteed on the latest version.
Create trusted contacts with people you know and contact regularly.
Block messages from numbers you don't know. You can always unblock them later.
Don't open messages that you think are suspicious.
Please note: End-to-end encryption can only cover messages in transit. Once the message is on your phone, anyone who can see your phone can read your messages.
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Chats on Viber for Desktop or on a tablet are secured as long as you are using Viber version 6.0 or newer.
If you are not using one of these versions, upgrade your version now.
If you are unsure whether a conversation is encrypted or not, look in your chat info screen for the message below.
Don't see this message?
It could be that one or both of you in the conversation does not have the latest version of Viber. Make sure you are both up to date before continuing the conversation.
You can authenticate the contacts that you trust the most from your chat info screen.
Authentication tells Viber that you confirm that the person you are communicating with is who they say they are, providing you with an extra level of security protection if anything changes with your contact.
Follow these steps to authenticate a contact:
1. Open the chat info screen of a contact 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 on your screen
5. Read the code that appears to each other and confirm the codes match
6. Click on Trust this contact
7. The lock icon in your call will turn green to confirm successful authentication
Group chats are covered by Viber's security measures, but the more public groups such as Public Chats and Communities are not end-to-end encrypted.
Look for the encrypted group chat sign in the chat info screen.
If this sign is missing in the chat info screen you may need to check that everyone in your group is running a recent version of Viber.
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