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Roll your own
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Sniffing Sunlight - Erik Kamerling
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- 1 Background
- 2 The concept of modulated light
- 3 Roll your own
- 4 Buy commercial
- 5 Most lasers that are used in this capacity are infrared and very expensive
- 6 Infrared is used because the whole idea of a laser listening device, is to use it surreptitiously
- 7 The thing
- 8 Infrared laser range finders are almost a complete laser mic.
- 9 The precursor - Bell's Photophone
- 10 The Photophone continued
- 11 Building basic Photophone stuff
- 12 Building a simple receiver
- 13 Amplifiers
- 14 Demonstration of audio modulated • into ambient light
- 15 A morse type toy. Modulating thumps
- 16 Catching reflections
- 17 Natural reflections
- 18 Attacking with tape
- 19 Interesting examples of what's possible
- 20 Heliostats
- 21 Remember when we spoke about surreptitious attacks? • A Photophone receiver is surreptitious because it can capture from the environment at large. It does not rely on specifically arranged optics
- 22 How about this?
- 23 The smart phone as a modulated light decoder • This is really where it's at • Apps like Light Detector and Boop show what's possible via the light sensor on mobile phones
- 24 man's brush pass or dead-drop
