Abstract: A method for detecting malicious servers. The method includes analyzing network traffic data to generate a main similarity measure and a secondary similarity measure for each server pair found in the network traffic data, extracting a main subset and a secondary subset of servers based on the main similarity measure and the secondary similarity measure, identifying a server that belongs to the main subset and the secondary subset, and determining a suspicious score of the server based on at least a first similarity density measure of the main subset, a second similarity density measure of the secondary subset, and a commonality measure of the main subset and the secondary subset.

Abstract: An apparatus and method for assembling and interconnecting stacked optoelectronic circuit boards is described. The circuit boards are rotatably attached using a mechanism such as a hinge. Transmission lines such as optical fibers interconnecting the boards are guided parallel to or on the rotational axis of the attachment for a portion of their length. Bending stress on fiber optic interconnects due to relative motion of the circuit boards is minimized. Signals can be transmitted between the boards at any angle within a rotational range about the axis. This enhances access to components on stacked circuit boards and allows service procedures to be carried out efficiently.