Data recording method, data recording system, data recording apparatus, data reading method, data reading system, counting method, counting system, method of supplying encryption key, system for supplying encryption key and program

摘要

Data recorded in a recording medium is encrypted with an encryption/decryption key, and the encryption/decryption key is encrypted with an encryption-only key. The encrypted encryption/decryption key is embedded in encrypted data. A decryption-only key the encryption/decryption key is embedded in a program for reading. The data and the program for reading are recorded in the recording medium. The data cannot be read without the program for reading. The program for reading cannot be used for recording other data even if it is copied.