Check Point Mobile VPN plugin is now part of Windows 8.1 (including Windows RT 8.1)
Also see sk107536 - Check Point Capsule VPN available for Windows 10
Check Point Mobile VPN plugin uses SSL. It is now part of Windows 8.1 (including Windows RT 8.1).
Mobile VPN in Windows 8.1 is called "Check Point VPN Plugin" and it is pre-installed in the Operating system. No installation is necessary.
This is also the only client that is available in Windows RT (Surface RT for example).
To learn how to configure the VPN Plugin, refer to Capsule Connect and Capsule VPN Clients Administration Guide - "Windows 8.1 VPN Plugin for PC" section.