Abstract: Systems and methods for controlling the transmission of data in a computer network; specifically, systems and methods related to preventing the transmission of compromised data. In one embodiment, a web server is configured to transmit requested data to a remote client through a computer network, such as the Internet. The web server includes a conventional computing system, including a processor and random access memory, and a non-volatile storage medium for storing the requested data. A software-defined process is executed by the computing system, whereby the software-defined process and the computing system cooperate to receive a request from a remote client for the requested data; determine whether the requested data has been compromised; and prevent the transmission of the requested data to the remote client if the data is compromised.