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     Feature 
    1: Since the relation
    between a key and a lock is an optical-communications system,
    it becomes the lock without a keyhole. 
    2: Its personal identification
    number can be created using a cellular phone (to 10 figures). 
    Operation is easy and can be created in less than 1 minute. 
    Change is also possible at less than 1 minute. 
    10 billion kinds of personal identification numbers can be chosen. 
    3: The delay time of several
    seconds is prepared in collation of a personal identification
    number. 
    Therefore, even if it carries out with which supercomputer, it
    will become such a thing for a decipherment 300 years. 
    4: Since it is an electronic
    lock, remote control can be built easily. 
    5: The lock of many places,
    such as a house, a company, and a car, can open and close with
    one key with one key. 
    6: A master key, a grand
    master key, etc. can be created easily. 
    In addition, there are many functions which are not in the conventional
    key. 
    7: Attachment is also
    more simple compared with the case of the conventional key. 
    8: Even when a key is
    lost, only change of a personal identification number is required. 
    Therefore, since exchange of a lock is unnecessary, it does not
    require expense, either. 
    It can be called an ideal key.  |