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Secret lock on Wikileaks 'insurance file'

19 August 2010 Last updated at 12:41 BST

Wikileaks co-founder Julian Assange responds to a question by BBC reporter Chris Vallance about why it provides locked files for download.

The files could be unlocked if the whistle-blowing organisation releases a key.

The site currently offers an 'insurance file' for download which could be opened if it chooses to release a secret code.

Video courtesy of the journalists' organisation Frontline Club.