Cryptography Reference
In-Depth Information
Figure 9.3: Even the second-to-least significant bits appear fairly ran-
dom. These are the second-to-least significant bits of the photo in
Figure 9.1.
1, then you would choose color 3 for that pixel. If you wanted to hide
a 0, then you would choose color 2.
There is no reason why the least significant bit needs to be used
to separate pairs. It might very well be any of the bits. Here is another
table where the third bit is used to mix pairs:
Entry Num.
Binary
Red Intensity Green Intensity
Blue Intensity
0
00000000
150
20
10
.
.
.
.
.
2
00000010
14
150
165
.
.
.
.
.
4
00000100
132
100
10
.
.
.
.
.
33
00100001
151
20
12
.
.
.
.
.
35
00100011
16
152
167
.
.
.
.
.
37
00100101
135
67
15
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