MATLAB Project
Aaron Osher
Create a tool for the secure and inconspicuous movement of data
My Goals
Photo Steganography
Audio Steganography
AES Implementation
Photo Steganography
Audio Steganography
AES Implementation
Photo Steganography
Audio Steganography
AES Implementation
MATLAB is Very Good at what it does–that's it.
Flow of Events
My Approach
Least Significant Bit
Header Data
Header Data
% TEXT HEADER
% String form
'h0001234'
% Decimal form
104 48 48 48 49 50 51 52
% Binary form
'1101000'
'0110000'
'0110000'
'0110000'
'0110001'
'0110010'
'0110011'
'0110100'% IMAGE HEADER
% String form
'10241024'
% Decimal form
49 48 50 52 49 48 50 52
% Binary form
'110001'
'110000'
'110010'
'110100'
'110001'
'110000'
'110010'
'110100'Encoder
% Red - bit 1
if str2double(code(1)) == 0
prepared_image(row1,col1,1) = bitand(prepared_image(row1,col1,1),uint8(254));
else
prepared_image(row1,col1,1) = bitor(prepared_image(row1,col1,1),uint8(1));
end
% Green - bit 2
if str2double(code(2)) == 0
prepared_image(row1,col1,2) = bitand(prepared_image(row1,col1,2),uint8(254));
else
prepared_image(row1,col1,2) = bitor(prepared_image(row1,col1,2),uint8(1));
end
% Blue - bit 3
if str2double(code(3)) == 0
prepared_image(row1,col1,3) = bitand(prepared_image(row1,col1,3),uint8(254));
else
prepared_image(row1,col1,3) = bitor(prepared_image(row1,col1,3),uint8(1));
endDecoder
% Get first set RGB for bits 123 respectively
[row1,col1] = ind2sub([canY,canX],location(1));
% Red - bit 1
data(1,1) = mod(img(row1,col1,1),2);
% Green - bit 2
data(1,2) = mod(img(row1,col1,2),2);
% Blue - bit 3
data(1,3) = mod(img(row1,col1,3),2);Live Demo
Questions?
Video Demo
MATLAB Project
By Aaron Osher
