private byte[] getIV() {
		if (algName.equalsIgnoreCase("TwoFish")) {
			return trimBytes(16);
		}else if (algName.equalsIgnoreCase("SkipJack")) {
			return trimBytes(8);
		}else if (algName.equalsIgnoreCase("Salsa20")) {
			return trimBytes(8);
		}
		return IV;
	}