Abstract: Methods and systems for detecting a potential compromise of cyber security in an industrial network are disclosed. These methods and systems comprise elements of hardware and software for generating and analyzing vectors indicative of network behavioral states to establish thresholds for anomalous behavior in the industrial network.

Abstract: Methods and systems for detecting a potential compromise of cyber security in an industrial network are disclosed. These methods and systems comprise elements of hardware and software for establishing a baseline of site-acceptable network behavior comprising a list of network states and transition probabilities, wherein a transition probability denotes an estimated probability of a first network state being followed temporally by a second network state during normal network operation; establishing a threshold representing tile probability below which a sequence of network states is anomalous; determining a probability for the occurrence of a sequence of network states as obtained from a particular stream of packets, according to the baseline of site-acceptable network behavior; and, taking protective action according to whether the determined probability is below the established threshold.

Abstract: Disclosed is a system and method for detecting anomalous behavior in Industrial Control Networks. The system first operates in a learning phase to learn various behaviors, and then in a protection phase to analyze packets to identify anomalous network events, and, for example, raise an alert.

Abstract: Methods and systems for detecting a potential compromise of cyber security in an industrial network are disclosed. These methods and systems comprise elements of hardware and software for establishing a baseline of site-acceptable network behavior comprising a list of network states and transition probabilities, wherein a transition probability denotes an estimated probability of a first network state being followed temporally by a second network state during normal network operation; establishing a threshold representing tile probability below which a sequence of network states is anomalous; determining a probability for the occurrence of a sequence of network states as obtained from a particular stream of packets, according to the baseline of site-acceptable network behavior; and, taking protective action according to whether the determined probability is below the established threshold.