[Jacob]

I took an open source VB.net RC4 module and well. Converted it into a Java method. (for those of you who dont know java, FUNCTIONS are called METHODS in java)

To use this, just C/P this method into another class(if you want to use object orientation). If not, then just c/p it into your main class and then call if like this.

Code:

rc4("message, variable or whatever you want encrypted here", "the password you want it to protect over");

Here is the code for the encryption

Code:

public static String rc4(String message, String password) { int i = 0; int j = 0; StringBuilder cipher = new StringBuilder(); String returnCipher = ""; int[] sbox = new int[257]; int[] key = new int[257]; int intLength = password.length(); int a = 0; while (a <= 255) { char ctmp = (password.substring((a % intLength), (a % intLength) + 1).toCharArray()[0]); key[a] = Integer.valueOf(ctmp); sbox[a] = a; Math.max(System.Threading.Interlocked.Increment(a), a - 1); } int x = 0; int b = 0; while (b <= 255) { x = (x + sbox[b] + key[b]) % 256; int tempSwap = sbox[b]; sbox[b] = sbox[x]; sbox[x] = tempSwap; Math.max(System.Threading.Interlocked.Increment(b), b - 1); } a = 1; while (a <= message.length()) { int itmp = 0; i = (i + 1) % 256; j = (j + sbox[i]) % 256; itmp = sbox[i]; sbox[i] = sbox[j]; sbox[j] = itmp; int k = sbox[(sbox[i] + sbox[j]) % 256]; char ctmp = message.substring(a - 1, a - 1 + 1).toCharArray()[0]; itmp = Integer.valueOf(ctmp); int cipherby = itmp ^ k; cipher.append((char)(cipherby)); Math.max(System.Threading.Interlocked.Increment(a), a - 1); } returnCipher = cipher.toString(); cipher.setLength(0); return returnCipher; }