From NextGov:

Apple has OSX and iOS. Google has Chrome OS and Android. Microsoft has Windows. And the isolated state of North Korea has its own operating system, too.

Called Red Star, two researchers in Germany dug into its code to discover that it’s based on the open-source software Linux. One of Red Star’s key features is a watermarking system that secretly creates a record of everyone who’s touched that file.

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Red Star quietly adds a unique identifier to media files—pictures, Word documents, or videos—the moment they are accessible. For example, if a USB drive containing an illicit document is plugged into a computer running Red Star, that file is automatically tagged with that computer’s unique identifier. If that file is copied to another machine, the new machine’s identifier is added to the watermark.

“It’s a wet dream for an oppressive regime,” said one of the Red Star researchers, Niklaus Schiess, at the Chaos Communication Congress in Hamburg on Dec. 27.

Unsanctioned information in the Hermit Kingdom is often passed around on USB sticks or microSD cards. North Korea isn’t alone when it comes to state-sponsored operating systems. Cuba and China have their own versions, also based on Linux. India announced plans for its own OS in September.

While North Korea’s interest in dissident reading habits is no surprise, Schiess and Florian Grunow, his partner on the project, found some apparently privacy-preserving features in Red Star. The system comes bundled with a program that lets users encrypt their data–with no apparent backdoor built in for decryption.

“We thought…

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