I have two pictures:
The second picture is the same as the first but contains a secret which is the MD5 checksum of some key I'll need to decrypt a small amount of text (the background is black in the second one).
I know this might be unwelcome here but it is a university assignment, I have to retrieve the MD5 from the picture and reverse it so i can decrypt with it the text .
I'm not asking to do the work for me, actually I'm enjoying figuring this out , that's why I didn't upload the pics nor the encrypted text . I tried some things so far like checking for a watermark in the picture with OpenPuff and StegoMagic to no avail. Most of the tools I found searching Google are out of date or no longer maintained since the 90s.
Text is definitely hidden in the picture its no question of "if", its clearly stated in the assignment that its a text hidden via LSB (least significant bit) stenography.
I have spent some time trying to figure out this thing - the problem is the PNG format and the black background. If its only hiding an MD5 (32 chars) then not much should really change. The black background makes it hard because a lot changed.
Any idea how should I tackle this?