The benefits of using a VPN service to protect your privacy are clear: Your ISP and other snoops won't be able to spy on your online activity. What's not always clear is which VPN service is trustworthy.

A VPN , or virtual private network, is software that creates a secure connection between your device and the internet by routing your internet traffic through an encrypted tunnel to a remote server. A VPN essentially masks your IP address and helps keep some of your browsing activities private. Recently, three university researchers have discovered that 18 of the most widely used VPNs on the Google Play store have shared infrastructures with serious security flaws that could expose customers' browsing activity and leave it vulnerable to decryption. These VPNs are among the top 100 m

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