我想加密诸如'HELO1234之类的消息,然后解密以获得原始消息。我在 matlab 中编写了 RSA 代码,但无法正常工作。
PARAMETER CALCULATION
temp=1;
range=1:10;
k=isprime(range)
prime_mat=range(find(k))
p=randsample(prime_mat,1);
q=randsample(prime_mat,1);
if(p~=q)
n=p*q;
phi_n=(p-1)*(q-1);
u=1:phi_n -1;
end
while temp
enckey=randsample(u,1);
deckey=randsample(u,1);
if(enckey~=deckey)
if(gcd(enckey,phi_n)~=1 ...
&& gcd(deckey,phi_n)~=1 ...
&&gcd(enckey*deckey,phi_n)~=1)
temp=1;
else
temp=0;
end
end
end
ENCRYPTION PROCESS
char t= 'hello123';
t=uint8(t);
len=length(t)
pow=[];
cipher_text=[];
for i=1:len
pow=[pow;t(i).^(enckey)]; %each element of the pt matrix(plain text) is raised to the power of encryption key(enc_key) and stored in pow matrix(power matrix)
cipher_text=[cipher_text;mod(pow(i),n)];% cipher text is calculate
d
OUTPUT OF encryption process
k =
0 1 1 0 1 0 1 0 0 0
prime_mat =
2 3 5 7
p =
7
q =
2
n=
14
加密 key =
5
装饰=
1
phi_n =
6
长度=
28
密文=
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
DECRYPTION PROCESS
plain_text=[];
pow1=[];
len1=length(cipher_text);
for i=1:len
pow1=[pow1;cipher_text(i).^(deckey)]
plain_text=[plain_text;mod(pow1(i),n)]
uint8(纯文本);
最佳答案
不要费心自己实现。编写密码很困难,错误会带来安全后果。使用来自受信任供应商的知名库。
在 Matlab 中,您可以调用与 Matlab 捆绑在一起的 JVM 中包含的标准 Java 加密类。 Matlab 代码看起来像这样。
import javax.crypto.Cipher;
plaintext = 'foobar';
cipher = Cipher.getInstance('RSA');
keygen = java.security.KeyPairGenerator.getInstance('RSA');
keyPair = keygen.genKeyPair();
cipher.init(Cipher.ENCRYPT_MODE, keyPair.getPrivate());
plaintextUnicodeVals = uint16(plaintext);
plaintextBytes = typecast(plaintextUnicodeVals, 'int8');
ciphertext = cipher.doFinal(plaintextBytes)' %'
% And back out
cipher.init(Cipher.DECRYPT_MODE, keyPair.getPublic());
decryptedBytes = cipher.doFinal(ciphertext);
decryptedText = char(typecast(decryptedBytes, 'uint16'))'
关于matlab - matlab中的RSA代码,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9436323/