Abstract: A computer system is provided. The computer system includes a memory and at least one processor coupled to the memory and configured to deploy public key enumeration code and private key enumeration code to a plurality of endpoint devices for execution on the endpoint devices. The at least one processor is further configured to collect public keys and associated public key metadata from the endpoint devices, and to collect private key metadata from the endpoint devices. The public keys and associated public key metadata are generated by the public key enumeration code and the private key metadata is generated by the private key enumeration code. The at least one processor is further configured to generate a graph illustrating trust relationships between user accounts on the endpoint devices. The graph is based on the collected public keys, the collected public key metadata, and the collected private key metadata.

Abstract: A transmitter of a platform is arranged to generate a transmission pulse, which is transmitted to a receiver of another platform and is also arranged to couple its transmission pulse to a digital receiver associated with its platform via an attenuator and a coupler. Another platform performs a similar task. Each digital receiver determines the time separation between its transmission pulse and a received pulse from the other platform. The determined time separation information is shared with the other platform, and each digital receiver then determines a time offset between the time at its platform and the other platform.

Abstract: A transmitter (106, 120, 118, 122 and 110) of a platform (100) is arranged to generate a transmission pulse which is transmitted to a receiver (212, 224 and 208) of another platform (200) and is also arranged to couple its transmission pulse to a digital receiver (104) associated with its platform (100) via attenuater (126) and coupler (124). The other platform (200) performs a similar task. Each digital receiver (108, 208) determines the time separation between its transmission pulse and received pulse from the other platform (100 or 200). The determined time separation information is shared with the other platform (100, 200) and each digital receiver (108, 208) then determines a time offset (?t) between the time at its platform (100) and the other platform (200).

Abstract: An interferometer arrangement includes an antenna array that receives radiation from a plane wave emitted by a transmitter, the radiation being incident on the array at an angle (?). The array includes a plurality of antennas that provide output signals to a switching unit. The switching unit selects pairs of signals and passes them to a processor for processing. The processor is configured to produce an output signal that unambiguously indicates the value of the angle (?).