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A mysterious group purportedly offered up for auction malware -- hacking programmes -- which it said it had somehow obtained from the United States' electronic intelligence agency. But all is not necessarily all it seems in the murky world of espionage. The ÃÛÑ¿´«Ã½'s technology correspondent Rory Cellan-Jones on what may be going on... Photo: The NSA's campus in Maryland. Credit: AP