A study examined 14 popular commercial VPN providers around the world. 11 of the 14 providers leaked information, including the websites the user was accessing. The only three that didn’t were Private Internet Access, Mullvad and VyprVPN. One factor is that many VPNs still protect only IPv4 traffic, the researchers concluded. The study also examined the security of various mobile platforms when using VPNs and found that they were much more secure when using iOS but were still vulnerable to leakage using Android.”]