Abstract
In digital communication networks, typically information is sent after quantization. When such quantized information is used by controllers, it is known that quantization is very likely to degenerate control performance. In contrast, we show in this paper the interesting finding that quantization may improve privacy performance of the networked subsystems under control. Namely, there is a trade-off between control and privacy performances determined by the quantization step. In this paper, we look at a dither (also called random dithered quantizer) as a possible tool to improve both control and privacy performances for networked systems. We review some known improved control performances such as in sampling, and then further discuss the effects of a dither in privacy analysis.
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