| 摘要 |
PROBLEM TO BE SOLVED: To provide an information processing method by which continuous data transmission by means of a single transmission line or OS multi-task dealing, which is impossible with authentication in the state of one-to-one appropriation, is realized and dealing with the diversification of application and the movement to multi-task is available. SOLUTION: In an information processor 41 provided with a reproducing device 21, with which information from a medium is processed, and a data processor, with which the information transmitted therefrom is processed and is utilized, the reproducing device 21 reads out data recorded in the medium with an identification data ID from the data processor in accordance with request of the data processor, executes plural encipherment and authentication work by selective and time-division processing by temporarily storing an intermediate key INT KEY and transmits the data in time- division manner. The data processor process plural data, which are requested by the time-division processing being executed, by selective and time-division processing by temporarily storing parameters for the plural authentication work and decoding by means of the identification data returned from the reproducing device 21 and executes encipherment and authentication work corresponding to plural time-division processing. |
