Hiding secret codes in light can protect against fake videos

hiding secret codes in


Hiding secret codes in light protects against fake videos
Abe Davis, left, assistant professor of computer science in the Cornell Ann S. Bowers College of Computing and Information Science, and graduate student Peter Michael with a watermark light. Credit: Sreang Hok/Cornell University

Fact-checkers may have a new tool in the fight against misinformation.

A team of Cornell researchers has developed a way to “watermark” light in videos, which they can use to detect if video is fake or has been manipulated.

The idea is to hide information in nearly-invisible fluctuations of lighting at important events and locations, such as interviews and press…



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