March 31, 2020

Eric S. Yuan
CEO and Chairman
Zoom Video Communications, Inc.
55 Almaden Boulevard, 6th Floor
San Jose, CA 95113

Dear Mr. Yuan,
I write with concern and to seek information regarding how Zoom handles the personal
data of its users and protects against security threats and abuse against its services. The millionsof Americans now unexpectedly attending school, celebrating birthdays, seeking medical help,
and sharing evening drinks with friends over Zoom during the Coronavirus pandemic should nothave to add privacy and cybersecurity fears to their ever-growing list of worries.
Zoom is increasingly being used by schools and healthcare providers that have shut down
or limited their operations to stop the spread of Coronavirus, raising questions about how its
services comply with federal and state privacy laws protecting students, patients, and consumers.
While Zoom has recently taken commendable steps to clarify how it handles this information, its
privacy policy still grants it broad discretion to use personal data for other purposes thanproviding video conferences. For example, Zoom states that it “does use certain standard
advertising tools on our marketing sites which, provided you have allowed it in your cookie
preferences, sends personal data to the tool providers, such as Google.” Parents, patients, andfamilies should not have to worry that their children’s information, their health condition, or theirprivate discussions are being used for advertising and other unintended purposes.
Zoom has a troubling history of software design practices and security lapses that have
posed significant risks to the privacy and safety of its users. Until last week, Zoom’s iOS apps
routinely sent personal data about its users to Facebook, whether or not they had a Facebook
account, in order to track their behavior and target advertising. Zoom has also previously failed
to respond in a timely and diligent manner to security vulnerabilities in its Mac client thatallowed malicious attackers to silently eavesdrop on Zoom users, crash their computers, andinstall unwanted programs. When Zoom did issue an initial fix, that patch did not fully resolve
the vulnerability, requiring Apple to step in to protect its users.
Moreover, Zoom has not fully addressed pressing questions about how it protects users
from intrusions and abuse. Colleges, children’s groups, and others have reported alarming
campaigns of harassment from uninvited intruders, called “Zoombombing,” hijacking anddisrupting meetings, including anti-Semitic attacks against a Massachusetts Jewish studentorganization. Additionally, despite claims in security white papers and advertisements that Zoomoffers end-to-end encryption for its meetings, technical analysis from The Intercept found that it
does not protect the privacy of communications using this form of encryption. Zoom users
deserve clear and correct answers about how it protects the safety of its users and meetings.
Given the sensitivity of its services and the role of Zoom in our lives during theCoronavirus pandemic, I respectfully request a written response to the following questions byApril 14, 2020:
1. What personal data and session information does Zoom collect and retain from Zoom
users and video conferences? What does Zoom share with third parties, such as themarketing partners described in its privacy policy? Please provide the list of themarketing partners that are provided personal data and specific types of information.
2. Has Zoom made the privacy rights guaranteed under the California Consumer Privacy
Act (CCPA) and the E.U.’s General Data Protection Regulation (GDPR) available to all
American users?
3. What parental consent requirements, limitations on data collection, data access features,and other safeguards are provided under the Zoom for Education service? What steps has
Zoom taken to ensure that schools use its Zoom for Education service, rather than theconsumer version? How can parents and guardians exercise privacy rights for theirchildren with Zoom for Education?
4. Does Zoom provide end-to-end encryption, as the term is commonly understood bycybersecurity experts, for video conferences? Please describe when end-to-end
encryption is available for users and how this personal data is encrypted.
5. What measures has Zoom put into place to detect and prevent Zoombombing – intrusions
and abuse targeting Zoom meetings? What are the policies governing such abusive
behavior, what detection mechanisms are in place, how can users report abusive
intrusions, and how quickly does Zoom respond to such incidents?
6. What contact information, bug bounties, and other procedures does Zoom maintain toreceive reports and information about security vulnerabilities?

Thank you for your attention to these important issues. I look forward to your response.
Sincerely,______________________________
Richard Blumenthal
United States Senate