Computer security services providing content-centric threat detection based on user behavior for cloud, mobile or network resources; Computer security services preventing data leaks with content control, content classification, and policy based security control; providing temporary use of on-line non-downloadable computer software for providing content-centric threat detection based on user behavior for cloud, mobile or network resources; providing temporary use of on-line non-downloadable computer software for preventing data leaks with content control, content classification, and policy based security control