Patent ID: 7508941
Filing Date: 2009-03-24
Classification: G08B,H04L,H04N

Abstract:
1. A method of conducting surveillance comprising: placing a video data acquisition system (VDAS) in a public place to conduct surveillance of the public place; operating the VDAS, the VDAS producing a video signal depicting the public place, the video signal including a series of frames that correspond to different moments in time; encrypting the video signal using a first key, the first key being randomly generated such that a new randomly generated first key is used at different points in time; encrypting the first key using a second key; including at least the encrypted first key and encrypted video signal in an output signal; operating an image analyzer, the image analyzer: storing the output signal in a data storage medium; searching the data storage medium for a code corresponding to a specific person; and upon finding the code corresponding to the specific person in the data storage medium: