JPS6435777A - Data storage device - Google Patents
Data storage deviceInfo
- Publication number
- JPS6435777A JPS6435777A JP19178287A JP19178287A JPS6435777A JP S6435777 A JPS6435777 A JP S6435777A JP 19178287 A JP19178287 A JP 19178287A JP 19178287 A JP19178287 A JP 19178287A JP S6435777 A JPS6435777 A JP S6435777A
- Authority
- JP
- Japan
- Prior art keywords
- reading
- data
- writing
- converting
- information
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
PURPOSE:To protect the secret of data by subtracting converting value designating information from the data read out of a recording medium at the time of reading, reproducing the data received first from a host device, and transferring them to the host device. CONSTITUTION:Writing/reading data 4 are logically processed with the same writing/reading converting value information 7 as converting value designating information 6 set beforehand by a converting value designating circuit 1 and the data are written into the recording medium. At this time, the added logic processing is an addition. At the time of reading, the writing/reading data 4 together with the writing/reading converting value information 7 to which '1' is added after an inversion are inputted to a data converting circuit 3. At the writing/reading data converting circuit 3, the writing/reading data are added to the writing/reading information 7 and they are outputted as writing/reading output data 5. Thus, a hardware-like means to prevent the secret from leaking out can be held.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19178287A JPS6435777A (en) | 1987-07-30 | 1987-07-30 | Data storage device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19178287A JPS6435777A (en) | 1987-07-30 | 1987-07-30 | Data storage device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6435777A true JPS6435777A (en) | 1989-02-06 |
Family
ID=16280448
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19178287A Pending JPS6435777A (en) | 1987-07-30 | 1987-07-30 | Data storage device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6435777A (en) |
-
1987
- 1987-07-30 JP JP19178287A patent/JPS6435777A/en active Pending
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