Right now, the OpenVPN protocol is believed to be the most secure VPN protocol available. Even though it doesn’t offer the fastest possible speeds, it can safeguard your private data in a highly secure way.
VyprVPN review: A reliable VPN service with the latest The iOS version has the same choice of protocols – a rarity for an iOS VPN – but doesn’t have a killswitch. The Android version, however, has the same protocol options, more controls over NordVPN review: One of our best VPN services just got Apr 27, 2020
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FastestVPN: World’s Best and Fastest VPN Service Provider Jan 03, 2020
IPSec is the fastest secure connection. It's lower in the network stack, and as such it doesn't have the overhead SSL based VPNs do. L2TP/IPSec is the most common IPSec combination.
Which is the Best VPN Protocol? PPTP vs. OpenVPN vs. L2TP