A complaint filed with the Federal Trade Commission (FTC) on Monday alleges that the popular free Virtual Private Network (VPN) service Hotspot Shield collects a large amount of data and intercepts user traffic.
Submitted by the Center for Democracy & Technology (CDT), the complaint (PDF) urges the FTC to investigate the data security and data sharing practices of Hotspot Shield, alleging they are “unfair and deceptive trade practices.” The complaint also claims the service engages into undisclosed data sharing and traffic redirection practices despite promising to protect the users’ privacy.
CDT, a nonprofit technology advocacy organization, suggests that Hotspot Shield’s privacy policy contradicts the advertised privacy and security claims. The service claims to keep no logs of a user’s online activity or personal information, and to store no user data, while also saying that it doesn’t track users and doesn’t sell their information.
The privacy and security claims are highlighted as key features of the Hotspot Shield VPN mobile applications in both iTunes and Google Play storefronts, but the service’s privacy policy “describes more elaborate logging practices,” the complaint reads. A source code analysis of Hotspot Shield backs these allegations, CDT says.
The organization also claims that “the VPN promises to connect advertisers to users who frequent websites in particular categories and while most VPNs prevent internet service providers from seeing a user’s internet traffic, that traffic is often visible in unencrypted form to Hotspot Shield. VPNs typically log data about user connections to help with troubleshooting technical issues, but Hotspot Shield uses this information to identify user locations and serve advertisements."
CDT also points out that Hotspot Shield’s privacy policy says that it doesn’t collect personal user information, claiming that IP addresses and unique device identifiers aren’t considered personal information by the free VPN provider. Moreover, the complaint claims the service deploys persistent cookies and that it also “works with unaffiliated entities to customize advertising and marketing messages.”
Furthermore, the complaint alleges that Hotspot Shield insists it doesn’t make money from selling customer data, but that the service also promises to connect advertisers to users that frequently access travel, retail, business, and finance websites. CDT points out that these partners can link information about users’ web-viewing habits even if they are provided only with hashed or proxy IP addresses.
An analysis of Hotspot Shield’s functionality, data sharing, and network connections was performed by Carnegie Mellon University’s Mobile App Compliance System. Researchers downloaded and tested the Android app and found “undisclosed data sharing practices with third party advertising networks” when analyzing the application permissions.
They also discovered that the app discloses sensitive information such as names of wireless networks (via SSID/BSSID information), along with identifiers such as Media Access Control addresses, and device IMEI numbers.
The VPN was also found to inject JavaScript codes using iframes for advertising and tracking purposes, and to be using more than five different third-party tracking libraries. The apps also redirect e-commerce traffic to partnering domains, the complaint also claims.
“People often use VPNs because they do not trust the network they’re connected to, but they think less about whether they can trust the VPN service itself. For many internet users, it’s difficult to fully understand what VPNs are doing with their browsing data. Hotspot Shield tells customers that their privacy and security are ‘guaranteed’ but their actual practices starkly contradict this. They are sharing sensitive information with third party advertisers and exposing users’ data to leaks or outside attacks,” Michelle De Mooy, Director of CDT’s Privacy & Data Project, said.
Related: Android VPNs Introduce Security, Privacy Risks: Study
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