Method for communicating data in a computer network involves dynamically modifying at a first location in the computer network a plurality of true values. The true values correctly represent the plurality of identify parameters. These true values are transformed to false values, which incorrectly represent the identity parameters. Subsequently, the identity parameters are modified at a second location to transform the false values back to the true values. The position of the first and/or second locations varies dynamically as part of this process. A bridge transforms identity parameter values when communicating outside the network. Dynamic modification of the identity parameters occurs in accordance with a mission plan that can be modified without interrupting communication of data in the network.