In brief: Deepfakes are one of those technologies that, while impressive, are often used for nefarious purposes—and their popularity is growing.Companies have been working on ways of identifying a real video from an altered one for years now, but Intel's new solution looks to be one of the most effective and innovative.Deepfakes, which usually involve superimposing someone's face and voice onto another person, started gaining attention a few years ago when adult websites began banning videos where the technique was used to add famous actresses' faces to porn stars' bodies.But the biggest concern is how deepfakes have led to the spread of misinformation—the fake video of Ukraine president Volodymyr Zelensky surrendering was spread on social media earlier this year.Intel and Intel Labs' version, aptly called FakeCatcher, takes a unique approach: analyzing blood flow."