| 摘要 |
An IC chip (12) has a memory (16) for storing first random numbers (11) and information (such as identification numbers 17) other than the first random numbers (11). The IC chip (12) allows information stored in the memory (16) to be read out therefrom, in a noncontact manner, with time differences in accordance with the values of the first random numbers (11). The first random numbers (11) are set to a memory address counter (13) of the IC chip (12) for time difference control, whereby the memory address counter (13) can be also used to control reading out of the memory data, resulting in the logic to be constructed being simple. In this way, there can be provided a semiconductor device that is small in size, i.e., equal to or less than 0. 5 mm per side and that allows congestion control to be performed.
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