public static FeistelCypher getFeistelCypher(FeistelCypherType type) {
		FeistelCypher cypher = null;
		switch (type) {
		case TEA:
			cypher = new TEA();
		case XTEA:
			cypher = new XTEA();
			break;
		case XXTEA:
			cypher = new XXTEA();
			break;
		}
		return cypher;

	}