Zoom Cryptography Whitepaper

This is the home of the whitepaper documenting the cryptographic design powering several Zoom products, including end-to-end encryption for emails, phone and meetings. The latest released PDF will always be available here. This repository will be updated as we implement and iterate on our cryptographic protocols.

See the changelog for a summary of what changed in each version. Note that, before version 4.0, this document was titled "E2E Encryption for Zoom Meetings", but we updated the name to reflect its expanded scope. We still value feedback, recommendation and corrections. Please continue to post them under Issues.

Timeline

• 24 June 2025: Version 4.7 was published.
• 23 December 2024: Version 4.6 was published.
• 17 June 2024: Version 4.5 was published.
• 21 May 2024: Version 4.4 was published.
• 21 November 2023: Version 4.3 was published.
• 21 August 2023: Version 4.2 was published.
• 27 March 2023: Version 4.1 was published.
• 18 November 2022: Version 4.0 was published.
• 18 July 2022: Version 3.3 was published.
• 29 October 2021: Version 3.2 was published.
• 5 October 2021: Version 3.1 was published.
• 15 December 2020: Version 3 was published.
• 3 November 2020: Version 2.3.1 was published.
• 14 October 2020: Version 2.3 was published.
• 17 June 2020: Version 2 was published.
• 22 May 2020 - 5 June 2020: A comment period on the initial design
• 22 May 2020: Version 1 was published.