| 摘要 |
<p>PURPOSE:To keep secrecy for a user by being provided with a cassette with a memory and a scrambler and making key data as well in the case of recording data. CONSTITUTION:When personal data is inputted from a key board 9 in a recording and reproducing device 2, qualification data read from a memory part 3 in the cassette 1 with a memory are collated and compared with the inputted personal data by an identification circuit 7 through a control part 8. In the memory 3, key data descrambling scrambled recording contents written on a magnetic tape and making it normal data is recorded. At this time, when collation and comparison between the qualification data and the personal data are discrepant, a fact is displayed on a display part 10, and inputting in the personal data is urged again. Further, when the collation and the comparison coincide, read-out of descramble key data is executed to the memory part 3, and the key data is transferred to a tape data decoder 13 through interface parts 5, 6. Thus, only the specified user can dissolve the recording contents.</p> |
