A system including at least one hardware processor; and a non-transitory computer-readable storage medium having stored thereon program instructions, the program instructions executable by the at least one hardware processor to: receive, using a first transceiver, a radio-frequency (RF) transmission from an RF device; extract, from said RF transmission, at least one of: (i) noise samples from one or more segments of said RF transmission, and (ii) signal samples from one or more segments of said RF transmission; and determine the presence of a second transceiver in the path of said RF transmission, based, at least in part, on processing said extracted noise samples and signal samples.