public static void main(String[] args) {

		/* Cypher typer */

		System.out.println("Please select option:");
		System.out.println("  1.Start session");
		System.out.println("  2.Verify message");

		String alg = null;
		try {
			alg = (new BufferedReader(new InputStreamReader(System.in)))
					.readLine();
		} catch (IOException e) {
			e.printStackTrace();
		}

		if (alg == null) {
			alg = "1";
		}

		switch (alg) {
		case "1":
			startSession();
			break;
		case "2":
			verifyMessage();
			break;
		default:
			System.exit(1);
			break;

		}

	}