“…In an additional evaluation, we found that the average amount of probe requests sent per unique MAC address was 4.8. This is, again, a legitimate decline in comparison to the capture by Dagelić [6] et al in 2014 (24.1), 2015 (29.2) and 2017 (6.1) respectively, but is, again, higher than their 2018 count (2.6). For packages including SSIDs, the average amount of probe requests sent per MAC address was 11.2, which confirms that these are likely older devices of which less employ MAC address randomisation.…”