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BULLRUN CoI – Briefing Sheet

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Release Date: 2013-09-05
This undated GCHQ document provides a classification guide for BULLRUN – NSA and GCHQ’s attempts to weaken or defeat cryptographic protocols – and specifies some of its achievements: see the ProPublica article Revealed: The NSA’s Secret Campaign to Crack, Undermine Internet Security, 5 September 2013.
TOP SECRET STRAP1 COMINT BULLRUN Col - Briefing Sheet Introduction 1. The ability to exploit targets’ encrypted communications is extremely fragile and is often enabled through sensiti...

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