| 摘要 |
<p>A portable terminal is resistant to falsification of the spending limit of user's electronic money. The portable terminal includes a spending limit storage unit that stores the spending limit of electronic currency that can be spent; a network interface that receives, through a network, spending limit update information generated by a card server according to a notice from a parent user; a spending limit update unit that, when the spending limit update information is received, updates the spending limit stored in the spending limit storage unit, according to the received spending limit update information; a near field communication interface that detects carrier waves output from a reader/writer; and a secure element unit that applies for purchase when the carrier waves are detected. After the secure element unit applies for purchase, the spending limit update unit receives, from the card server, a spending limit based on whether the card server allows payment for the applied purchase and updates the spending limit stored in the spending limit storage unit according to the received spending limit.</p> |
