Important information transmission system, important information transmitting apparatus, important information transmission method, important information receiving apparatus, important information receiving method, and its program

摘要

PPROBLEM TO BE SOLVED: To provide an important information transmission system which permits only wireless terminal devices which can acquire information with a certain probability to continue communication under a limited communication environment, while preventing the interception of the other invalid wireless terminal devices. PSOLUTION: The important information transmission system consists of an important information transmitter 100 for transmitting important information to be used for communication, and an important information receiver 120 for receiving the important information. The important information transmitter includes a distributed information generator 212 for distributing the important information into n (2n) pieces of distributed information which requires at least k (2kn) pieces of distributed information for decompression of the important information, and a transmitting portion 214 on the transmission side which transmits the distributed information to the important information receiver via wireless communication. The important information receiver includes a receiving portion 250 on the reception side which receives the distributed information, and an important information restoring portion 252 which restores the important information from at least k pieces of distributed information. PCOPYRIGHT: (C)2007,JPO&INPIT