The document describes slides from a top-secret 2012 GCHQ conference that revealed the British intelligence agency had mounted an online attack on the hacktivist group Anonymous in September 2011. The slides were leaked by former NSA contractor Edward Snowden and obtained exclusively by NBC News, who published them with minimal redactions to protect individuals.

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The Snowden files: British intelligence agency describes attack on Anonymous
GCHQ, the British signals intelligence agency, prepared the following slides for a
top-secret conference in 2012, revealing that it had mounted an online attack on the
hacktivist collective known as Anonymous in September 2011.
The slides were leaked by former NSA contractor Edward Snowden and obtained
exclusively by NBC News.
NBC News is publishing the documents with minimal redactions to protect
individuals. All annotations appear in the original documents prepared by GCHQ.

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