Gallo, Alexander JulianTuran, Mustafa SahinBoem, FrancescaFerrari Trecate, GiancarloParisini, Thomas2019-09-022019-09-022019-09-02201810.1016/j.ifacol.2018.12.032https://infoscience.epfl.ch/handle/20.500.14299/160775The problem of replay attacks in the communication network between Distributed Generation Units (DGUs) of a DC microgrid is examined. The DGUs are regulated through a hierarchical control architecture, and are networked to achieve secondary control objectives. Following analysis of the detectability of replay attacks by a distributed monitoring scheme previously proposed, the need for a watermarking signal is identified. Hence, conditions are given on the watermark in order to guarantee detection of replay attacks, and such a signal is designed. Simulations are then presented to demonstrate the effectiveness of the technique.text::conference output::conference proceedings::conference paper