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Advanced chat encryption Follow

Advanced chat encryption will securely send chat messages between Zoom users. Encrypted messaging encrypts all chat messages using TLS 1.2 with Advanced Encryption Standard (AES) 256-bit algorithm.

This article covers:

Prerequisites

  • Zoom desktop client
    • Windows: 4.1.8826.0925 or higher
    • macOS: 4.1.8826.0925 or higher
  • Zoom mobile app
    • Android: 4.1.8855.0925 or higher
    • iOS: 4.1.8855.0925 or higher

Differences when advanced chat encryption is enabled and disabled

When advanced chat encryption is enabled:

  • Data at rest: Content is encrypted by keys generated & operated on chat participant's devices.
  • Data in transit: Chat is encrypted in transit using TLS

When advanced chat encryption is disabled:

  • Data at rest: Chat content is encrypted by keys generated and operated on our AWS server with AWS KMS.
  • Data in transit: Chat is encrypted in transit using TLS

Limitations after enabling advanced chat encryption 

After you enable advanced chat encryption, users and admins can't use these chat features:

User

Admin

**Note: Link previews and chat history search are supported if using version 5.8.0 or higher for Windows, macOS, Android, and iOS. 

Enabling advanced chat encryption

Note: If you signed up for a new Zoom account after August 21, 2021; or the New Admin Experience is enabled on your account, IM groups have merged with Groups. Learn how to create groups and change group settings.

To enable the advanced chat encryption for all members of your organization:

  1. Sign in to the Zoom web portal.
  2. In the navigation panel, click Account Management then IM Management.
  3. Click the IM Settings tab.
  4. Verify that the Enable advanced chat encryption option is enabled.
    If the setting is disabled, click the toggle to enable it. If a verification dialog displays, choose Turn On to verify the change.
  5. (Optional) If enabling advanced chat encryption, select the Enable link preview check box to enable link previews.
    When enabled, link previews will be shown to users who send or receive chat messages with links. The local application will detect the link in the sender's message before it is encrypted, and the preview will be shared between the sender and recipient. Only URLs are detected by this link preview feature and they must match http:// or https:// followed by a non-empty space. This feature is disabled by default.

Using encrypted chat

After enabling advanced chat encryption, chats in the Zoom desktop client and mobile app tab will display a lock icon to indicate that advanced chat encryption is enabled.

Users will not see the encrypted chat until they open Zoom. Notifications (including those on the lock screen) will state that they have received an encrypted chat.