in my app I wanted to implement some enciphering. Therefore I need the code for the Vigenere cipher. Does anyone know where I can find that source code for Java?
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2AFAIK it's a pretty simple cipher, why don't just implement it yourself? In fact you can check if Java Cryptography library has the implementation, anyways, I won't recommend using Vigenere cipher in real world applications. – Egor Jul 05 '12 at 15:14
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you can find your answer here in this link http://stackoverflow.com/questions/10280637/vigenere-cipher-in-java-for-all-utf-8-characters – Mostafa Elbutch Apr 17 '13 at 16:25
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This is Vigenere cipher Class, you can use it, just call encrypt and decrypt function : The code is from Rosetta Code.
public class VigenereCipher {
public static void main(String[] args) {
String key = "VIGENERECIPHER";
String ori = "Beware the Jabberwock, my son! The jaws that bite, the claws that catch!";
String enc = encrypt(ori, key);
System.out.println(enc);
System.out.println(decrypt(enc, key));
}
static String encrypt(String text, final String key) {
String res = "";
text = text.toUpperCase();
for (int i = 0, j = 0; i < text.length(); i++) {
char c = text.charAt(i);
if (c < 'A' || c > 'Z') continue;
res += (char)((c + key.charAt(j) - 2 * 'A') % 26 + 'A');
j = ++j % key.length();
}
return res;
}
static String decrypt(String text, final String key) {
String res = "";
text = text.toUpperCase();
for (int i = 0, j = 0; i < text.length(); i++) {
char c = text.charAt(i);
if (c < 'A' || c > 'Z') continue;
res += (char)((c - key.charAt(j) + 26) % 26 + 'A');
j = ++j % key.length();
}
return res;
}
}
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Here is a link to a Vigenere Cipher Code implementation Sample Java Code to Encrypt and Decrypt using Vigenere Cipher, besides that I cannot recommend to use Vigenere Cipher as encryption.
I recommend jBCrypt.
Konrad Reiche
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@GeoGriffin Thanks for pointing out, I have updated the link to another example. – Konrad Reiche Mar 27 '13 at 18:29
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