Patent ID: 8539232
Filing Date: 2013-09-17
Classification: G01S,H04L,H04W

Abstract:
1. An information terminal apparatus, comprising: reception means for receiving satellite signals transmitted from artificial satellites comprising a global navigation system; calculation means for calculating, based on said satellite signals, current-position/current-time information indicating a current position and a current time of said information terminal apparatus, independent of a link between said information terminal apparatus and an information processing apparatus; authentication means for determining whether said information processing apparatus is a legitimate counterpart for connection with said information terminal apparatus, and for permitting communication means to transmit information data to said information processing apparatus only when said information processing apparatus is authenticated as a legitimate counterpart for the connection; said communication means for transmitting/receiving said information data to/from said information processing apparatus via a communication network, said transmitted information data including identification information identifying said information terminal apparatus and a user thereof to said information processing apparatus, and a condition that is met based on said current-position/current-time information; informing means for informing said user of said identification information; key generating means for generating an encryption key based on said current-position/current-time information after said information processing apparatus is authenticated as a legitimate counterpart; encryption means for encrypting said information data transmitted by said communication means to said information processing apparatus; decryption means for decrypting said information data received from said information processing apparatus using said key only when said information terminal apparatus meets said condition by being within a predetermined position range, a predetermined time range, or both the predetermined position range and the predetermined time range, the decryption means decrypting coupon information for a store when the information terminal apparatus moves within the predetermined position range of the store; and display means for displaying the coupon information for the store and for displaying position information of the information processing apparatus when the information terminal apparatus is receiving data input by a user of the information processing apparatus.