[Hide-in-picture-users] Question about HIP for BMP

[Paul <pau...@gm...>]

Hello - I'm new to the list but have been playing around with HIP for
a little while now.

I've a question relating to the way HIP handles bmp formatted files.
First off - great program...

I'm using 24 bit BMP's and according to the file structure, after the
headers the colours are defined by an RGB quad array. That is 1 byte
for blue, green, red and one additional byte is 'reserved' (which must
always be set to zero).

Accordingly it should be white =3D 0xFFFFFF00 and black =3D 0x00000000.

In one of my experiments, I noticed that comparing the original image
with an image with hidden data the 'reserved' byte was being used (ie,
it was non-zero).

My question is, would this not immediately make it easy to pin point
the image as being altered if the byte was being used to 'hide'
information.

Any guidance would be appreciated...

/paul