Java Security

Hi friends...

I have a problem with class javax.crypto.Cipher.
I have created the following functions for encrypting and decrypting data:

public static void sendEncryptedBytes(byte[] bytesToSend, Key key,
DataOutputStream dos) throws Exception {
Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
cipher.init(Cipher.ENCRYPT_MODE, key);
byte [ ] iv = cipher.getIV();
dos.writeInt(iv.length);
dos.write(iv);
byte [ ] encryptedBytes = cipher.doFinal(bytesToSend);
dos.writeInt(encryptedBytes.length);
dos.write(encryptedBytes);
}


public static byte[] receiveEncryptedBytes(Key key, DataInputStream dis) throws
Exception {

Cipher cipher = Cipher.getInstance("DESede/CBC/PKCS5Padding");
byte [ ] iv = new byte[dis.readInt()];
dis.readFully(iv);
cipher.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(iv));
cipher.init(Cipher.DECRYPT_MODE, key);
byte [ ]encryptedBytes = new byte[dis.readInt()];
dis.readFully(encryptedBytes);
return cipher.doFinal(encryptedBytes);
}

If I encrypt and decrypt with the same key I haven't any problems.
If I encrypt with a key and I decrypt with a different key the program trows the following exception:

javax.crypto.BadPaddingException: Given final block not properly padded

I'd like that the data encryption operation doesn't fail beacause I'd like to use this data for the following control.
I'm writing an implementation of an authentication protocol, EKE (Encrypted Key Exchange).

I'm totally desperate!!


Thank's,
Francy