My website sells memberships to protected pages which contain links to downloadable assets (downloadalbe assets = primarly flash video files [.swf] generated by techsmith's Camtasia 6, Adobe PDF, ipod [.m4v] and windows media assest .WMV). Site already has ecommerce installed (merchant via cybersource gateway and paypal digital checkout) and is built in ExpressionEngine (www.expressionengine.com). Immediate need is assistance in improving security of downloadable options. Need help:...