The US military says the leaks originated with a 22-year-old soldier, Bradley Manning (pictured) who has been held in solitary confinement for the last few months and is facing a court martial in 2011.
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It was childishly easy, according to the published chatlog of a conversation Manning had with a fellow-hacker. "I would come in with music on a CD-RW labelled with something like 'Lady Gaga' … erase the music … then write a compressed split file.
No one suspected a thing ... [I] listened and lip-synched to Lady Gaga's Telephone while exfiltrating possibly the largest data spillage in American history." He said that he "had unprecedented access to classified networks 14 hours a day 7 days a week for 8+ months".
Manning told his correspondent Adrian Lamo, who subsequently denounced him to the authorities: "Hillary Clinton and several thousand diplomats around the world are going to have a heart attack when they wake up one morning and find an entire repository of classified foreign policy is available, in searchable format, to the public ... Everywhere there's a US post, there's a diplomatic scandal that will be revealed. Worldwide anarchy in CSV format ... It's beautiful, and horrifying."