Wednesday, May 29, 2013

NuitDuHack2013 Steganography 1

The question is:

"This time, take one LSB out of two, reverse the whole bit stream, add
a 0 every seven bits, uncompress, keep only one byte out of two and
you'll be done. Really."

We are given 2 attachments as attached.

bitmap.zip

Since it is only 1 point, it is
quite straight forward. Unzip the bitmap.zip, open up to view the
picture. The flag is written on the picture itself.

The flag is:
ffb19ff73f8268231392909c4b11ee56

Regards,
billa316

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