import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Scanner;
public class Encryption {
public static void main(String[] args)
throws FileNotFoundException, IOException
{
Scanner sc = new Scanner(System.in);
System.out.println("Note : Encryption Key act as Password to
Decrypt the same Image,otherwise it will corrupt the Image.");
// Here key is act as password to Encrypt and
// Decrypt the Image
System.out.print("Enter key for Encryption : ");
int key = sc.nextInt();
// Selecting a Image for operation
FileInputStream fis = new FileInputStream(
"C:UserslenovoPictureslogo4.png");
// Converting Image into byte array, create a
// array of same size as Image size
byte data[] = new byte[fis.available()];
// Read the array
fis.read(data);
int i = 0;
// Performing an XOR operation on each value of
// byte array due to which every value of Image
// will change.
for (byte b : data) {
data[i] = (byte)(b ^ key);
i++;
}
// Opening a file for writing purpose
FileOutputStream fos = new FileOutputStream(
"C:UserslenovoPictureslogo4.png");
// Writing new byte array value to image which
// will Encrypt it.
fos.write(data);
// Closing file
fos.close();
fis.close();
System.out.println("Encryption Done...");
}
}
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