<div class="gmail_quote">On Wed, 5 Jan 2011 23:37:23 +0000, Simon Greenwood <<a href="mailto:sfgreenwood@gmail.com">sfgreenwood@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> On 5 January 2011 23:24, Rowan Berkeley <<a href="mailto:rowan.berkeley@gmail.com">rowan.berkeley@gmail.com</a>> wrote: > Well, so, leaving aside all discussion of keyholes and screwdrivers, can > anyone give me a command I can enter in the terminal which will verify > that the file is indeed an aes256 encrypt? I ask no more than that. > Try openssl aes-256-ebc verify -in <filename> If you haven't got the openssl tools, you should be asked to install them. However, discussions on Bruce Schneier's blog suggest that 7zip identifies it. You might find it interesting: <a href="http://www.schneier.com/blog/archives/2010/08/wikileaks_insur.html" target="_blank">http://www.schneier.com/blog/archives/2010/08/wikileaks_insur.html</a> </blockquote></div> Well, I couldn't get the verify command syntax quite right, so I have given up. The Schneier page is interesting though; full of crypto boffins making outlandish suggestions. Thanks. R