Verification of privacy of Web Real-Time Communications media channels via corresponding WebRTC data channels, and related methods, systems, and computer-readable media are disclosed. Air from the bypass duct 1 can be introduced via at least one inlet nozzle 5 into a cooling-air distributor 7 by a control system 6, 10, 11 and the air is subsequently returned to the bypass flow 3. The fingerprint sensing portion may include the dielectric layer, and, in some embodiments, may also include an array of sensing electrodes also carried by the dielectric layer.