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The cyber security company Guardtime was founded in Estonia back in 2007. It is a spin-off from Tallinn University of Technology and has its HQ based in Netherlands and city office in Irvine, California, US. Guardtime technology is based on software invention - Keyless Signature Infrastructure (KSI) which is Blockchain digital signature system. Company has attracted much interest from cyber world and has partnered up with several big data companies. Guardtime released BLT, the new Blockchain standard for digital ID in May 2016 as the old protocol RSA was outdating. The most recent $1,8M deal has been made with DARPA, US military corporation and it looks like there is a lot more to come ...

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