Feistel Cipher

FEISTEL CIPHER import java.io.*; import java.util.*; class feistel { public static void main(String args[]) throws Exception { int a[]=new int[20]; int left[]=new int[10]; int right[]=new int[10]; int key[]=new int[10]; int temp[]=new int[10]; int m[]=new int[10]; int i,k; Scanner sc=new Scanner(System.in); BufferedReader br=new BufferedReader(new InputStreamReader(System.in)); System.out.println("Enter length of string:"); int n=Integer.parseInt(br.readLine()); System.out.println("Enter plaintext:"); for(i=0;i
for(i=0;i<(n/2);i++) left[i]=right[i]; for(i=0;i<(n/2);i++) right[i]=m[i]; System.out.println(); System.out.println("Round " + (k+1)); System.out.print("Left:"); for(i=0;i<(n/2);i++) System.out.print(left[i]); System.out.println(); System.out.print("Right:"); for(i=0;i<(n/2);i++) System.out.print(right[i]); } System.out.println(); System.out.println("Encrypted string is:"); for(i=0;i<(n/2);i++) { System.out.print(left[i]); } System.out.print(" "); for(i=0;i<(n/2);i++) System.out.print(right[i]); } } /*OUTPUT: C:\ins>java feistel Enter length of string: 8 Enter plaintext: 01010101 Enter key: 1010 Left string: 0101 Right string: 0101 Round 1 Left:0101 Right:1010 Round 2 Left:1010 Right:0101 Round 3 Left:0101 Right:0101 Round 4 Left:0101 Right:1010 Encrypted string is: 0101 1010 */