| 摘要 |
PROBLEM TO BE SOLVED: To provide an information transmission system capable of dealing with various communication methods or enciphering methods in simple configuration. SOLUTION: The information transmission system using a transmitter for generating enciphered data by enciphering data by using a cryptographic key selected out of a plurality of cryptographic keys and for transmitting the relevant enciphered data while being added with a search key corresponding to the relevant selected cryptographic key, and the receiver having a key table storing a plurality of cryptographic keys, a search table storing the correspondent relation of a plurality of search keys and a plurality of cryptographic keys on the key table, a key searching means for acquiring the cryptographic key corresponding to the relevant search key from the key table by searching the search table while using the search key and, a deciphering means for deciphering the enciphered data by using the relevant acquired cryptographic key are used for the information transmission system. |
