DATA SENDING DEVICE, DATA DECRYPTION DEVICE, DATA SENDING METHOD, DATA DECRYPTION METHOD, AND TRANSMISSION SYSTEM

摘要

PROBLEM TO BE SOLVED: To realize a data transmission which makes cryptoanalysis difficult and is adequate for copyright protection or the like. SOLUTION: The cryptoanalysis of cryptographic algorithms is made difficult even if the program data to be transmitted are encrypted by adding random noises to the front and rear thereof is transmitted, and the encryption data are extracted in the process of the transmission, etc., The decryption of the data is carried out by removing the data segments added with the random noises after the cryptoanalysis of the encryption.