Exercise $1$:

A primary steganography tool will embed three fields in the bitmap data part of the cover file: $(1)$ a $4-$byte integer

that represents the number of characters of the secret message, $(2)$ a $4-$byte integer that corresponds to the

number of bytes in the bitmap data, and $(3)$ the hidden message.

A secret message has been embedded in the "smal$1-$image.bmp$"$ file. The dump of the resulting file is shown in

Figure $5($the file is also distributed with this lab with the name "smal$1-$image$-$with$-$secret. bmp$").$ Notice that to

make it easier to understand, the bytes that were affected by the inclusion of the secret messages are in italic. Also,

the following command can be very useful. You are required to find the hidden message.

vbindiff small$-$image.bmp small$-$image$-$with$-$secret.bmp

Figure $5$: Dump of the File of the Small Image with a Secret Message Embedded