This is also used to share (usually .jar) files on 4chan and other imageboards. It's highly insecure of course, but an option if you're restricted by filetype for some reason.
~Griffin On Wed, Aug 8, 2012 at 9:11 AM, dan jones <[email protected]> wrote: > On 08/08/12 23:07, David Majlak wrote: > > > > I'd just like to add one cool thing they show you how to do in the > > pack: Apparently al-qaeda was transmitting files via jpeg. You can zip > > or rar a file, and combine them in the CMD prompt, and when you open > > it, only the picture will open until you either separate the two, also > > at the command prompt, or rename the file to .zip or .rar. Very cool. > This is trivial to detect and retrieve the data if you have a copy of > the original picture, which is likely if it is a picture already on the > web. Don't use this for any sort of security. -- "I believe that usability is a security concern; systems that do not pay close attention to the human interaction factors involved risk failing to provide security by failing to attract users." ~Len Sassaman PGP Key etc: https://www.noisebridge.net/wiki/User:Fontaine
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