| 摘要 |
In a method and a related system for providing perimeter security so as to restrict entry to authorized persons among a larger group of persons, not all of whom may be authorized, a token is issued to each person of the larger group. The token displays or identifies a unique set of electronically readable data identifying that person, who can present the token when seeking entry. Moreover, a photograph image of each person of the larger population is entered into a database, which is maintained in a computer having a display, preferably a portable or hand-held computer. The data displayed or recorded by each token presented by a person seeking entry are read, via an electronic reader, and the read data are sent to the computer. The sent data are compared to the database, via the computer, and the photographic image entered on the database of the person identified by the sent data is displayed, via the display.
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