Important Notice: Please begin updating all your Zoom applications to version 5.0 or higher. After May 30, 2020, all Zoom applications on older versions will receive a forced upgrade when trying to join meetings as GCM Encryption will be fully enabled across the Zoom platform. Learn more on how to update your Zoom application or update now.

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Encryption for Meetings Follow

Overview

By default, Zoom encrypts in-meeting and in-webinar presentation content at the application layer using TLS 1.2 with Advanced Encryption Standard (AES) 256-bit algorithm for the Desktop Client.

For dial-in participants joining by phone, the audio is encrypted until it leaves Zoom's data centers and is transferred to the participant's phone network.

Encryption can be required for H.323 and SIP devices joining Zoom meetings. This setting is configured at the account level, group, or user level. Once enabled, endpoints using Zoom Conference Room Connector will use TLS 1.2 with AES 256 for SIP signaling, and AES 128 for media transmission for both SIP and H.323. Encryption will need to be enabled on these devices when joining your Zoom meeting or they will receive an error and be unable to join.

This article covers:

Prerequisites

  • Zoom account - Free, Pro, Business or Education Account

Instructions

Enable or Disable H.323/SIP Endpoint Encryption all members of your organization

  1. Sign in to the Zoom web portal as an administrator with the privilege to edit account settings.
  2. Click Account ManagementAccount Settings.
  3. Navigate to the Require Encryption for 3rd Party Endpoints (H323/SIP) setting under In Meeting (Basic) and click the toggle to enable or disable it. Choose Turn On or Turn Off to verify the change.
  4. (Optional) If you want to make this setting mandatory for all users in your account, click the lock icon, and then click Lock to confirm the setting.

Enable or Disable H.323/SIP Endpoint Encryption for members of a specific group

  1. Sign in to the Zoom web portal as an administrator with the privilege to edit groups.
  2. Click User ManagementGroup Management.
  3. Click the name of the group, then click the Settings tab.
  4. Navigate to the Require Encryption for 3rd Party Endpoints (H323/SIP) setting under In Meeting (Basic) and click the toggle to enable or disable it. If a verification dialog displays, choose Turn On or Turn Off to verify the change.
    Note:
    If the option is grayed out,  it has been locked at the Account level, and needs to be changed at that level.

    (Optional) If you want to make this setting mandatory for all users in this group, click the lock icon, and then click Lock to confirm the setting.

Enable or Disable H.323/SIP Endpoint Encryption for your own use

  1. Sign in to the Zoom web portal.
  2. Click Settings (if you are an account member).
  3. Navigate to the Require Encryption for 3rd Party Endpoints (H323/SIP) setting under In Meeting (Basic) and click the toggle to enable or disable it. If a verification dialog displays, choose Turn On or Turn Off to verify the change.

    Note: If the option is grayed out, it has been locked at either the group or account level, and you will need to contact your Zoom administrator.