This document discusses building secure HTML5 business applications. It argues that HTML5 applications done right can be more secure than native apps for several reasons: the HTML5 security model provides sandboxing; they can be containerized for secure browsing; they integrate well with mobile device management; and HTML5 is ideal for BYOD environments. An HTML5 platform should integrate with enterprise access control, enable fine-grained security, support flexible deployment models, integrate with backend services, and allow development in a single language. The document promotes Gizmox as an enterprise HTML5 platform that delivers these capabilities.