"Hacking" Encrypted Bitmap file

[Guest]

Hi All,

I have few encrypted bitmap file. The original source program for encrypting
those bitmap is no longer exists. FYI, the original program to encrypt those
images is writing in DOS.

Now I need to decrypt those image file in C#. Is there anyway that I can do
to decrypt those images?

Any advice is much appreciated.

Thanks.

 

[Guest]

Hi Venedict,
in order to decrypt the bitmap files you will need to know the algorithm
that was used to encrypt the bitmaps and if an encryption key was used you
will also need to know that. Without this knowledge there is not much chance
for you to be able to decrypt the files. Do you have access to the source
code for the original program to see how they encrypted the files?

Mark.