JPS6435777A - Data storage device - Google Patents

Data storage device

Info

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
Application number
JP19178287A
Other languages
Japanese (ja)
Inventor
Yasuhiro Masuyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP19178287A priority Critical patent/JPS6435777A/en
Publication of JPS6435777A publication Critical patent/JPS6435777A/en
Pending legal-status Critical Current

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.
JP19178287A 1987-07-30 1987-07-30 Data storage device Pending JPS6435777A (en)

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)

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