Abstract
We propose scheduling strategies to determine transmission schedules that prevent traffic analysis and the creation of covert channels due to temporal variation in the transmission of packets. In addition to requiring the traffic matrix be neutral we require the transmission schedule be temporally neutral to eliminate that potential coved channel. The static scheduling policy generates temporally neutral transmission schedules. We extend this to develop an adaptive scheduling policy that can adapt to long term load fluctuations. The adaptive algorithm is expensive and there exists the possibility of a low bandwidth and noisy covert channel; we suggest mechanisms to reduce the bandwidth of the covert channel. The tradeoff is between the "adaptability" of the scheduling policy and the bandwidth of the covert channel.<>