Rajat Khapre from Delhi wants to know: "How do biometric facial recognition systems work?"
Facial recognition technology is taking hold in China, while in Europe it's considered a sign of a looming surveillance state. DW's Frank Sieren thinks there might be a happy medium.
The social media giant Facebook will have to go to court over its "tag suggestions" tool after a US judge approved a class action lawsuit against the company. The company has been grappling with a privacy crisis.
Privacy activists hate the idea of using biometric ID software in public places. But DW's Jefferson Chase says that it's better to test whether it can help prevent terrorism and major crime than to reject it out of hand.
Police are recruiting subjects to test biometric recognition systems at a Berlin train station. Data protection advocates are wary, but police and volunteers say the pilot project will help fight crime.
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