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https://www.theregister.com/2014/07/03/nsa_xkeyscore_stasi_scandal/ https://www.theregister.com/2014/07/03/nsa_xkeyscore_stasi_s... https://daserste.ndr.de/panorama/xkeyscorerules100.txt https://daserste.ndr.de/panorama/xkeyscorerules100.txt