ALIAS Web Puzzle FAQ
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Steg and
Camouflage 101 Submitted by Zephyr_hex: Download a couple of known stegged images and save them to your drive. I have put a couple of example in the "files" section of the group (conlan6, cd2736-001_max, clipping and fig-1a.gif). To load stegdetect, double click on xsteg.exe In stegdetect, select your sensitivity level (1 is low), and then do "file" and then "open". Use the bar near the top to navigate to the directory where you saved the images. Once you are in that directory, the file names should show up in the window called "files". Select your image. Conlan6 starts testing positive for jphide at sensitivity 4. cd2736-001_max tests positive at level 1. clipping tests positive at level 4. fig-1a.gif is not a jpg, and so therefore, stegdetect doesn't recognize it. So this is how we test for the existance of hidden images/files. When you have a file that tests positive on a relatively low sensitivity, then you need to come up with a password. Experience from last season -- the passwords are usually closely related to the images (as you will see in the examples below. For an explanation on the relationship of the password to the image, see Avery's Season 1 FAQ in the "bookmarks" section of the group) (I will describe how to decode the hidden files below) First, there are two destegging programs. one was used at the beginning of last season, and then we were introduced to a different program. this is important, because we've found that attempting to use steg047 on some items from later in the season did not work -- late season items needed a program called camouflage. so, download steg047 and camouflage, and install them on your drive (both programs are located in the "files" section of the group). When you install camouflage, select the option to include camo in your right-click menu list. We'll start with steg047 and conlan6.jpg. Open steg047 by double clicking on jphswin.exe. Select "open jpeg" from the title bar menu, and choose conlan6.jpg. Then select "seek" from the title bar menu. Enter in the password (shepard), and then give your image a unique name (such as test.jpg). Then go to the folder you saved this new file in, and open your jpg (should be a map of colentina). NOTE: you can change the options so that you can see the password as you type it in, and so that you don't have to enter the password twice. Go through the same process with cd2736-001_max (password is DProgram). You should get the first page of a McCullough/Cyan memo. Again, same process for clipping.jpg (password is katejones). You should get a text file (make sure to name it filename.txt). Ok.. now close out steg047. With camouflage, i selected the option at install time which allows me to access the program by right-clicking on any image. Go to fig-1a.gif and right-click on it, and select "uncamouflage". Password is omega17. This will bring up a box with two files. Select briefing1a.txt and click "next". Choose a place to save it to. So, this concludes 101 on steg.
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Alias FAQ Home / Joey's Pizza / The Trail / FAQ / Operations / Profiles / Steg & Camo / EJeffy Redirects / Links / Letters & 47 / WhoIs / Introduction / Red Herrings Last update: 9/30/03 |