Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for correlating domain activity data. First domain activity data from a first network domain and second domain activity data from a second network domain is received. The first domain activity data and the second domain activity data is filtered to remove irrelevant activity data, based on a first set of profile data for devices in the first network domain and a second set of profile data for devices in the second network domain. Unfiltered first and second domain activity data is aggregated. Aggregated unfiltered first and second domain activity data is correlated to determine an attack path for an attack that occurs across the first network domain and the second network domain, based on attack signatures and profiles associated with previously identified attacks. A visualization of the attack path is generated.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for transforming representations of network activity data. A data structure that represents communication events between computing devices of one or more networks is received. The data structure is analyzed and a set of potential attack paths represented in the data structure is determined. A score is assigned to each potential attack path in the set of potential attack paths. Potential attack paths that have scores that do not meet a predetermined threshold are removed from the set of potential attack paths. Potential attack paths that remain in the set of potential attack paths are ranked, based on each score assigned to each potential attack path, and the data structure that includes a ranked set of potential attack paths is provided.

Abstract: Systems, methods, and apparatus, including computer programs encoded on computer storage media, for facilitating communication in an industrial control network. A system includes an industrial control network, one or more controller devices, one or more emulators, and an encryption relay processor. Each controller device can be operable to control one or more operational devices connected to the industrial control network. Each emulator can be configured to communicate with a respective controller device, and each emulator can be configured to reference a respective profile that includes information about security capabilities of the respective controller device. The encryption relay processor can be operable to facilitate communication to and from each emulator over the industrial control network.

Abstract: Systems, methods, and apparatus, including computer programs encoded on computer storage media, for facilitating secure communication. A system for facilitating secure communication includes an enterprise network, one or more operational technology networks, and a management server. Each of the operational technology networks can include one or more controller devices operable to control one or more operational devices, and can include a respective site security server and a respective security relay server. The security relay server can be operable to facilitate secure communication between controller devices of the operational technology network and its corresponding site security server. The management server can be a node on the enterprise network and can be operable to communicate with each site security server.