图像的AES加密算法的MATLAB仿真源码

川长思鸟来 2022-09-10 15:18 191阅读 0赞

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAZnBnYSZtYXRsYWI_size_7_color_FFFFFF_t_70_g_se_x_16][]![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAZnBnYSZtYXRsYWI_size_16_color_FFFFFF_t_70_g_se_x_16][]

%AES\_DEMO Demonstration of AES-components.  
%  
% AES\_DEMO  
% runs a demonstration of all components of  
% the Advanced Encryption Standard (AES) toolbox.  
%  
% In the initialization step the S-boxes, the round constants,  
% and the polynomial matrices are created and  
% an example cipher key is expanded into  
% the round key schedule.  
% Step two and three finally convert  
% an example plaintext to ciphertext and back to plaintext.

% Version 1.0 30.05.2001

% Initialization  
\[s\_box, inv\_s\_box, w, poly\_mat, inv\_poly\_mat\] = aes\_init;

tu=imread('5.jpg');  
lena=tu(:,:,1); %for color to blackwhite map

% lena=imread('lean256.jpg') %for blackwhite map

for i=1:256  
for j=1:256  
data(i,j)=double(lena(i,j));  
end  
end

cipher\_data=zeros(256,256);

for i= 1:256  
for j = 1:16  
plaintext = data(i, (j-1)\*16+1:j\*16);  
plaintext = plaintext';  
ciphertext = cipher (plaintext, w, s\_box, poly\_mat, 1);  
cipher\_data(i, (j-1)\*16+1:j\*16) = ciphertext;  
end  
end

cipher\_img = uint8(cipher\_data);  
colormap(gray)  
imagesc(cipher\_img);

D115

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