| 摘要 |
PROBLEM TO BE SOLVED: To improve efficiently in communication when concealing information by transmitting an interference signal. SOLUTION: A transmitting apparatus 11 transmits to a receiving apparatus 12 concealment request information showing request for concealment, and then transmits information to be concealed to the receiving apparatus 12. The receiving apparatus 12 receives the concealment request information and then generates an interference signal. Therefore, the interference signal is sent to a communication path only while the information to be concealed is transmitted on the communication path. The receiving apparatus 12 receives a receiving signal having the interference signal superimposed on the information to be concealed, subtracts the interference signal from the receiving signal at a subtractor to remove the interference signal in the receiving signal, and acquires the information to be concealed. The present invention is applicable to receiving apparatuses, for example. COPYRIGHT: (C)2009,JPO&INPIT
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