I suggest that you get hold of a copy of the book "Anti Hacker Toolkit" by Keith J Jones and others. Published by McGraw Hill. ISBN 0-07-222282-4. This contains details of what you need to build a forensics toolkit. The CD with the book contains a number of the recommended items.It is a fascinating insight into hacking and how to overcome it.
also makes forensic software, Forensic Toolkit. It is less costly than Encase. However it does depend on what you are trying to acomplish. Many serious forensic examiners use multiple tools because each has strengths and weeknesses.
disclaimer: I am employed by AccessData as a programmer.
How can I search for:
Skin color detection (e.g. a gallery view sorted by skin color percentage greatly accelerates a search for traces of child pornography)
okay, you are really getting into it.
if you know the hex value for the color bit of the skin tone you are looking for and examine files for that bit and reconstruct the file where the bit was found you may be able to recapture the picture.
easy for standard picture files but steg makes the task even more difficult.
however, if you are this far into it you should be working more with one of the law enforcement organizations and less with us here.
Im not following, when I open a gif image with skin in word pad I get:
(-$JRH‡“‡®½¯Öè×ãöåÚðÝÕìÖØòÛá÷äîúîèñçãëäçïèîõðð÷òìóðæíêìôóëóóêñôêðõêðõèîõåëòàèïÓÞæËÛâÇÚßÈßáÉæãÈêãÅëßÁêÛ¿éاѿ’¸¦‹œŠ§—y“…[rdDTI
Œ|n¯ŸƒÁµ‘ÏÃ…¾¶?·²t¥£Q}~&LP9=7=18.7091:/8
,5+4/83<
.75><E@I@H=E;C;CBGDI!GL"HM!GL FKFIFI'RU(SV+WX0\]6de<jk?nl?nk<lf>og8d]/[T2[T0YR9]WHlf
Im not seeing any hex values in there:
ex: #CCCCCC or #FF1122
Can you give me a little more info on what to look for?
use a hex editor to open the image - it will show you the contents in...guess what... hex !
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