def strip_keys(key_list):
    """ Given a list of keys, remove the prefix and remove just
    the data we care about.

    for example:

        ['defender:blocked:ip:ken', 'defender:blocked:ip:joffrey']

    would result in:

        ['ken', 'joffrey']

    """
    return [key.split(":")[-1] for key in key_list]