private void calculateSessionKeySupport(PrivateKey y, PublicKey gToTheX)  {
	    try {
		// Find g^xy
		KeyAgreement serverKeyAgree = KeyAgreement.getInstance("DiffieHellman");
		serverKeyAgree.init(y);
		serverKeyAgree.doPhase(gToTheX, true);
		byte[] secretDH = serverKeyAgree.generateSecret();
		if (debug) System.out.println("g^xy: "+byteArrayToHexString(secretDH));
		//Use first 16 bytes of g^xy to make an AES key
		byte[] aesSecret = new byte[16];
		System.arraycopy(secretDH,0,aesSecret,0,16);
		Key aesSessionKey = new SecretKeySpec(aesSecret, "AES");
		if (debug) System.out.println("Session key: "+byteArrayToHexString(aesSessionKey.getEncoded()));
		// Set up Cipher Objects
		decAESsessionSupport = Cipher.getInstance("AES");
		decAESsessionSupport.init(Cipher.DECRYPT_MODE, aesSessionKey);
		encAESsessionSupport = Cipher.getInstance("AES");
		encAESsessionSupport.init(Cipher.ENCRYPT_MODE, aesSessionKey);
	    } catch (NoSuchAlgorithmException e ) {
		System.out.println(e);
	    } catch (InvalidKeyException e) {
		System.out.println(e);
	    } catch (NoSuchPaddingException e) {
		e.printStackTrace();
	    }
	}