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Hiding secret codes in light protects against fake videos
A team of Cornell computer science researchers has developed a way to “watermark” light in videos, which they can use to detect if video is fake or has been manipulated, another potential tool in the fight against misinformation.
The idea is to hide information in nearly-invisible fluctuations of lighting at important events and locations, such as interviews and press conferences or even entire buildings, like the United Nations Headquarters. However, these approaches depend on the video creator using a specific camera or AI model – a level of compliance that may be unrealistic to expect from potential bad actors. The work received partial support from a National Defense Science and Engineering Graduate Fellowship and the Pioneer Centre for AI.
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