Sousveillance ( ; ) is most commonly defined as (1) the recording of an activity by a participant in the activity"Sousveillance: Inventing and Using Wearable Computing Devices...", by Steve Mann, Jason Nolan and Barry Wellman, in Surveillance & Society 1(3), 2003"Sousveillance: Inverse Surveillance in Multimedia Imaging, by Steve Mann, in ACM Multimedia 2004, pp.