A method for implementation by one or more data processors forming one or more computing devices, the method comprising: concurrently receiving by a switch coupled to a transceiver , a plurality of electrical signals from the transceiver over a time period, wherein the time period is partitioned into a plurality of sampling windows; sequentially selecting an electrical signal of the plurality of electrical signals; iteratively capturing , for the sequentially selected electrical signal, a temporal snapshot of said electrical signal over a sampling window of the plurality of sampling windows including: receiving by a track and hold component coupled to the switch the selected electrical signal and pausing said selected electrical signal in time; sampling by a converter coupled to the track and hold component and a sequencer the selected electrical signal; and triggering by the sequencer coupled to the transceiver , the track and hold component and the switch , each of the track and hold component and the converter to operate at a moment in time; and repeating the iteratively capturing for remaining sampling windows of the plurality of sampling windows; and temporally concatenating each captured temporal snapshot over the time period according to its respective temporal position of the time period to generate a real-time fingerprint. concurrently receiving by a switch coupled to a transceiver , a plurality of electrical signals from the transceiver over a time period, wherein the time period is partitioned into a plurality of sampling windows; sequentially selecting an electrical signal of the plurality of electrical signals; iteratively capturing , for the sequentially selected electrical signal, a temporal snapshot of said electrical signal over a sampling window of the plurality of sampling windows including: receiving by a track and hold component coupled to the switch the selected electrical signal and pausing said selected electrical signal in time; sampling by a converter coupled to the track and hold component and a sequencer the selected electrical signal; and triggering by the sequencer coupled to the transceiver , the track and hold component and the switch , each of the track and hold component and the converter to operate at a moment in time; and repeating the iteratively capturing for remaining sampling windows of the plurality of sampling windows; and temporally concatenating each captured temporal snapshot over the time period according to its respective temporal position of the time period to generate a real-time fingerprint. receiving by a track and hold component coupled to the switch the selected electrical signal and pausing said selected electrical signal in time; sampling by a converter coupled to the track and hold component and a sequencer the selected electrical signal; and triggering by the sequencer coupled to the transceiver , the track and hold component and the switch , each of the track and hold component and the converter to operate at a moment in time; and repeating the iteratively capturing for remaining sampling windows of the plurality of sampling windows; and temporally concatenating each captured temporal snapshot over the time period according to its respective temporal position of the time period to generate a real-time fingerprint. <EOS>