Dynamic Flow Isolation

System and methods for communicating across a network comprise: a database containing high level security rules for the network; computing devices communicating on the network; a security rule translation module; event sensors configured to monitor and detect one or more events occurring on or relating to the network, and in response thereto, provide to the security rule translation module an indication of occurrence for each of the one or more security events. The security rule translation module may associate the security rules with the security events corresponding to the received indication, and produce a low-level security rule based on data from the high-level security rule and the received indication of occurrence of the security events. The system may also include switches coupled to receive the low-level security rules from the security rule translation module and enforce the low-level security rules on the network.