A method and system for providing security to a client computing system in communication with a host communication system across a network. The method includes executing a browser on the client computing system. A request to download data to be displayed in the browser may be communicated from the client to the host computing system. The data is downloaded from the host computing system to the client computing system via a client side firewall in response to the download request. An interactive software application is loaded in the browser, where the interactive software application utilizes the data downloaded from the host computing system. The interactive software application is executed in the browser on the client computing system, and may be in communication with at least one element, such as a browser or an element of an underlying architecture of a software application, on the client side of the client side firewall.