So I downloaded Pixelknot. I decided to try the "stand the fuck down" sarah silverman image… tried opening it with Pixelknot using various passwords, such as "standthefuckdown", "silverman", "standdown", etc… and while it didn't open the image, it gave me an idea of how pixelknot handles failure to decode… it just goes to about 60% and returns to the password prompt, saying "Try again".
So i changed my focus to this one:
The file name is DVsTEKFUQAEKlkJ
I figured that would be a good starting point for a decode password. People don't pay much attention to the file names if they seem to be gibberish… but this one LOOKS like it might be a password of some sort.
That was 10 minutes ago… and Pixelknot is still at 10% decoding the image… not sure why… the previous failures on the Silverman photoshopped image were pretty much 5 seconds of processing to get to 60%…
So I decided to cancel and try again… THIS time, it froze at 0%.
Will continue to try various things… and I will report back later.