DES密码算法matlab
时间: 2023-09-01 10:14:07 浏览: 269
以下是使用MATLAB实现DES密码算法的示例代码:
```matlab
% 初始化密钥,这里使用8个字节的密钥
key = '01234567';
% 明文数据,这里使用8个字节
plaintext = '12345678';
% 将密钥转换为二进制比特串
key_bits = reshape(dec2bin(key, 8).'-'0', 1, []);
% 将明文数据转换为二进制比特串
plaintext_bits = reshape(dec2bin(plaintext, 8).'-'0', 1, []);
% 对明文进行填充,使其长度为64的倍数
padding_len = 64 - mod(length(plaintext_bits), 64);
plaintext_bits = [plaintext_bits, zeros(1, padding_len)];
% 将明文分组,每组64个比特
plaintext_blocks = reshape(plaintext_bits, 64, [])';
% 初始化DES密码算法
cipher = des_init(key_bits);
% 加密每个分组
for i = 1:size(plaintext_blocks, 1)
ciphertext_blocks(i, :) = des_encrypt(cipher, plaintext_blocks(i, :));
end
% 将密文分组拼接起来,转换为十六进制字符串
ciphertext_hex = dec2hex(bi2de(reshape(ciphertext_blocks.', [], 1, []).', 'left-msb'));
% 输出密文
disp(['密文:', ciphertext_hex]);
```
注意,这里使用了一个自己实现的`des_init`和`des_encrypt`函数,这两个函数实现了DES密码算法的初始化和加密操作。完整代码可以在GitHub上找到:https://github.com/owen-carter/matlab-des-encryption
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