Zoom announced this week that on May 22 it will publish a detailed draft of the cryptographic design it plans on using for its upcoming end-to-end encryption feature.
As a result of increased scrutiny from privacy and security experts — as well as hackers targeting meetings — Zoom has started making improvements to its platform and it has promised to implement changes and new features that would significantly enhance security and privacy.
Zoom plans on rolling out AES 256-bit GCM encryption on May 30, but the company also plans on implementing true end-to-end encryption in the near future, for which it recently acquired secure messaging and file-sharing service Keybase. The new end-to-end encrypted meeting mode will be available to all paid accounts, Zoom said.
“Logged-in users will generate public cryptographic identities that are stored in a repository on Zoom’s network and can be used to establish trust relationships between meeting attendees. An ephemeral per-meeting symmetric key will be generated by the meeting host. This key will be distributed between clients, enveloped with the asymmetric keypairs and rotated when there are significant changes to the list of attendees. The cryptographic secrets will be under the control of the host, and the host’s client software will decide what devices are allowed to receive meeting keys, and thereby join the meeting,” the company explained when it announced the acquisition of Keybase.
Zoom announced this week that a detailed draft of its cryptographic design for end-to-end encryption will be made public on Friday. The draft will not include any code, but the company hopes to get some feedback before the feature is developed.
“We will be hosting discussions with cryptographic experts, customers, advocacy groups, and others to solicit feedback to evaluate for the final design,” Zoom said on Wednesday.
Zoom is also working on revamping its bug bounty program with the help of Luta Security. In the meantime, researchers can report vulnerabilities on zoom.us/security or by sending an email to security(at)zoom.us.
The company also plans on conducting a comprehensive security review and it has hired former Facebook CSO Alex Stamos to help it implement better security controls and practices. It has also created a CISO Council that will advise Zoom CEO Eric Yuan on security.