Zooms end-to-end encryption (E2EE) offering will be available as a technical preview next week. Free and paid Zoom users around the world can host up to 200 participants in an E2EE meeting on Zoom, providing increased privacy and security for your Zoom sessions. The keys for each Zoom meeting are generated by participants machines, not by Zoom’s servers. In a meeting with E2E enabled, nobody not even Zoom servers except the participant is not even allowed to decrypted the encrypted content.”]
Source: https://blog.zoom.us/zoom-rolling-out-end-to-end-encryption-offering/