Despite the continuous and continuous process of improving Bluetooth technology, devices and protocol based on this technology continue to be vulnerable. The passing nineteenth conference, Privacy Enhancing Technologies Symposium, again highlighted the relevance of this problem. The presentation was made by the staff of Boston University, who conducted new research about Bluetooth vulnerability. They made public data on the flaw in the Bluetooth presentation engine, which makes it possible to obtain information about the device identifier of interest and subsequent unimpeded and constant tracking of its movement.