We now have news of a litany of privacy breaches and misrepresentations of its capabilities.
Given their history, the logical conslusion is that they have violating their users’ private as a central part of their business model:
Zoom, the video conferencing service whose use has spiked amid the Covid-19 pandemic, claims to implement end-to-end encryption, widely understood as the most private form of internet communication, protecting conversations from all outside parties. In fact, Zoom is using its own definition of the term, one that lets Zoom itself access unencrypted video and audio from meetings.
With millions of people around the world working from home in order to slow the spread of the coronavirus, business is booming for Zoom, bringing more attention on the company and its privacy practices, including a policy, later updated, that seemed to give the company permission to mine messages and files shared during meetings for the purpose of ad targeting.
Still, Zoom offers reliability, ease of use, and at least one very important security assurance: As long as you make sure everyone in a Zoom meeting connects using “computer audio” instead of calling in on a phone, the meeting is secured with end-to-end encryption, at least according to Zoom’s website, its security white paper, and the user interface within the app. But despite this misleading marketing, the service actually does not support end-to-end encryption for video and audio content, at least as the term is commonly understood. Instead it offers what is usually called transport encryption, explained further below.
But when reached for comment about whether video meetings are actually end-to-end encrypted, a Zoom spokesperson wrote, “Currently, it is not possible to enable E2E encryption for Zoom video meetings. Zoom video meetings use a combination of TCP and UDP. TCP connections are made using TLS and UDP connections are encrypted with AES using a key negotiated over a TLS connection.”
The encryption that Zoom uses to protect meetings is TLS, the same technology that web servers use to secure HTTPS websites. This means that the connection between the Zoom app running on a user’s computer or phone and Zoom’s server is encrypted in the same way the connection between your web browser and this article (on https://theintercept.com) is encrypted. This is known as transport encryption, which is different from end-to-end encryption because the Zoom service itself can access the unencrypted video and audio content of Zoom meetings. So when you have a Zoom meeting, the video and audio content will stay private from anyone spying on your Wi-Fi, but it won’t stay private from the company. (In a statement, Zoom said it does not directly access, mine, or sell user data; more below.)
“They’re a little bit fuzzy about what’s end-to-end encrypted,” Green said of Zoom. “I think they’re doing this in a slightly dishonest way. It would be nice if they just came clean.”
Without end-to-end encryption, Zoom has the technical ability to spy on private video meetings and could be compelled to hand over recordings of meetings to governments or law enforcement in response to legal requests. While other companies like Google, Facebook, and Microsoft publish transparency reports that describe exactly how many government requests for user data they receive from which countries and how many of those they comply with, Zoom does not publish a transparency report. On March 18, human rights group Access Now published an open letter calling on Zoom to release a transparency report to help users understand what the company is doing to protect their data.
Not just a subpoena. If you bribe a Zoom employee, you could get access to the chat.
Also, Zoom has been found to be sharing user data with Facebook, even if you are not a member, refused to fix a remote access vulnerability until reported to the FTC, allowing meeting hosts to spy on user’s window status on their PCs, and collects personally identifiable data and links it to your IP address.
This is not a company that you want to deal with.