Preventing Nonconsensual Surveillance By Others

Karl gmkarl at
Thu Jun 11 06:39:29 PDT 2020

This is a public article from 2011 on electrojamming surveillance cameras.
I've heard people are doing this in the streets now.

Digital camera sensing and its image disruption with controlled
radio-frequency reception/transmission

Photography is becoming more and more end user capability, with many people
having digital cameras on their mobile phones. In general digital cameras
are phasing out traditional film based equipment. The advantages of digital
photography include the compactness of the cameras, high reliability and
ease of image processing and transmission of the images via the internet or
multimedia messaging (MMS) enabling the photographer to send his images
within seconds. These processes emphasize a big problem: the ability to
photograph an object without the approval of its owner. This unsolved
problem has many aspects: the right to privacy, paparazzi, industrial
intelligence and the protection of objects having high security
sensitivity. This paper describes test methodology and test results to
sense and then to disrupt digital imaging camera by using a controlled
Radio Frequency (RF) transmission. This method can be used in order to
create a system for causing a localized malfunctioning of a digital camera
in a specified area to degrade photographic recording done by the digital
camera, comprising the steps of coupling the digital camera to a source of
electromagnetic interference and generating electromagnetic waves in a
specific frequency to interfere with the correct functioning of at least
one electronic component of the digital camera.
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