Zero-Trust Security for Webex supports the following in end-to-end encrypted meetings:

  • Standards-based, formally-verified cryptography

  • End-to-end-verified identity (E2EI)

  • Webex Room devices (Room Series, Desk Series, and Board)

  • End-to-end encryption (E2EE) in Personal Room meetings

  • A security icon which lets all meeting participants know at a glance that their meeting is secure, as well as when end-to-end encryption is enabled for the meeting.

  • Verbal verification of meeting attendees using a new Security Verification Code

  • Up to 200 participants

  • Participants joining from a device must be one of the first 25 participants

Zero-Trust Security does not support the following in meetings:

  • Webex Meetings web app

  • Older Webex devices, such as the SX, DX, and MX series

  • Features provided by Cisco cloud services that require access to decrypted media, including:

    • Recording to the cloud

    • Transcoding media

    • Webex Assistant for Webex Meetings

      • Automated closed captioning

      • Transcription

    • Saving session data, transcripts, meeting notes, etc. to the cloud (local recording and saving is supported)

    • Public Switched Telephone Network (PSTN)

    • SIP interoperability

For more information on End-to-End Encryption, see What Does End-to-End Encryption Do?

To join an E2EE meeting from your Webex Board, Room, or Desk device, tap Join Webex and enter the meeting number that is listed in the Webex Meetings invite. Then, tap Join to join the meeting.

In the meeting, you can check whether the meeting is end-to-end encrypted by looking at the shield icon in the header.

  • – The meeting is end-to-end encrypted.

  • – The connection between your Webex desktop app and the Webex server is secure, but the meeting is not end-to-end encrypted.

A security code is provided to allow participants to verify that their connection is secure.

Tap the icon to see the security code and other security information for the meeting. The security code changes each time a participant enters the meeting.

All the meeting participants should see the same security code. If one person sees a different security code, their connection is not secure.

In the participants list, you can see information about the authentication status of each participant: verified or unverified.

  • – Participant's identity has been verified externally by a Webex Partner Certificate Authority (CA). This requires configuring an external certificate on your personal device.

  • – Participant's identity has been verified internally by Webex CA.

  • – Participant's identity is unverified.

More detailed information about the certificate provider is available by tapping a participant’s name and selecting Show Certificate.

Known Limitations

Transcoding or PSTN services are not available at this time, as they are not supported by the Zero-Trust Security model for End-to-End Encryption v2 (E2EEv2). A participant joining from a device must be one of the first 25 participants of any kind, or their call will be transcoded and they will not be admitted to the meeting. The maximum number of participants in an E2EEv2 meeting is 200.

You cannot join an E2EEv2 meeting through the Webex mobile app, or the UCF-Full Webex Meetings experience on Desktop or Webex Room devices. In addition, an SIP video device cannot join E2EEv2 meetings.