des

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.util.Base64;

public class DESExample {

public static void main(String[] args) {
    try {
        String plainText = "Hello World";

      
        KeyGenerator keyGen = KeyGenerator.getInstance("DES");
        SecretKey secretKey = keyGen.generateKey();

        
        Cipher cipher = Cipher.getInstance("DES/ECB/PKCS5Padding");

        
        cipher.init(Cipher.ENCRYPT_MODE, secretKey);
        byte[] encryptedBytes = cipher.doFinal(plainText.getBytes());
        String encryptedText = Base64.getEncoder().encodeToString(encryptedBytes);
        System.out.println("Encrypted Text: " + encryptedText);

      
        cipher.init(Cipher.DECRYPT_MODE, secretKey);
        byte[] decryptedBytes = cipher.doFinal(encryptedBytes);
        String decryptedText = new String(decryptedBytes);
        System.out.println("Decrypted Text: " + decryptedText);

    } catch (Exception e) {
        e.printStackTrace();
    }
}

}