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Javax crypto CipherInputStream

import java.io.BufferedReader; import java.io.FileInputStream; import java.io.InputStreamReader; import java.io.ObjectInputStream; import javax.crypto.Cipher; import javax.crypto.CipherInputStream; import javax.crypto.SecretKey; import javax.crypto.SecretKeyFactory; import javax.crypto.spec.DESKeySpec; import javax.crypto.spec.IvParameterSpec; public class MainClass {   public static void main(String args[]) throws Exception {     ObjectInputStream ois = new ObjectInputStream(new FileInputStream("keyfile"));     DESKeySpec ks = new DESKeySpec((byte[]) ois.readObject());     SecretKeyFactory skf = SecretKeyFactory.getInstance("DES");     SecretKey key = skf.generateSecret(ks);     Cipher c = Cipher.getInstance("DES/CFB8/NoPadding");     c.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec((byte[]) ois.readObject()));     CipherInputStream cis = new CipherInputStream(new FileInputStream("ciphertext"), c);     BufferedReader br = new BufferedReader(new InputStreamReader(cis));     System.out.println(br.readLine());   } }