def transform_key_to_list(key):
    """
    Convert key to list. Takes each 2 digit value and put it in list.
    :param key: Input key
    :return: Key as integer list format
    """
    key_int_list = list()
    for i in range(0, len(key), 2):
        key_int_list.append(int(key[i:i + 2], 16))
    return key_int_list