| 摘要 |
PROBLEM TO BE SOLVED: To provide a cryptographic key distribution server and its control method, which can reduce a load of the server that distributes cryptographic keys such as a public key, and can hold a vote, an auction, or the like impartial. SOLUTION: When it is at or before the starting time of the auction, the vote, or the like, a public key distribution server 20 forces a plurality of mobile terminals 1 to distribute a public key by using a common calling number all at once.
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