WO1995020789A1 - Dispositif de gestion des operations de lecture-ecriture sur disque dur informatique - Google Patents

Dispositif de gestion des operations de lecture-ecriture sur disque dur informatique Download PDF

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Publication number
WO1995020789A1
WO1995020789A1 PCT/CN1995/000010 CN9500010W WO9520789A1 WO 1995020789 A1 WO1995020789 A1 WO 1995020789A1 CN 9500010 W CN9500010 W CN 9500010W WO 9520789 A1 WO9520789 A1 WO 9520789A1
Authority
WO
WIPO (PCT)
Prior art keywords
read
hard disk
write
protected area
setting
Prior art date
Application number
PCT/CN1995/000010
Other languages
English (en)
Chinese (zh)
Inventor
Tong Shao
Original Assignee
Tong Shao
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
Priority claimed from CN94111461A external-priority patent/CN1053507C/zh
Application filed by Tong Shao filed Critical Tong Shao
Priority to AU15740/95A priority Critical patent/AU1574095A/en
Publication of WO1995020789A1 publication Critical patent/WO1995020789A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
    • G06F21/78—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data
    • G06F21/80—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data in storage media based on magnetic or optical technology, e.g. disks with sectors
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2211/00—Indexing scheme relating to details of data-processing equipment not covered by groups G06F3/00 - G06F13/00
    • G06F2211/007—Encryption, En-/decode, En-/decipher, En-/decypher, Scramble, (De-)compress

Definitions

  • the present invention relates to a device for protecting data security in a computer hard disk, and more particularly, to a device for controlling reading and writing of a computer hard disk.
  • No. 1 discloses a device for protecting data in a computer hard disk from being damaged by viruses or misuse by controlling hard disk read and write.
  • the device includes an interface circuit, A computing chip, a memory and a hard disk read-write control circuit.
  • the memory stores a hard disk read-write force table generated when the computer starts.
  • an interface circuit is provided to the computing-capable chip for reading and writing, and the latter judges whether the request is legal according to the reading and writing force table stored in the memory. If it is legal, it indicates that the hard disk read-write control circuit allows the computer to read and write, otherwise it indicates that the hard disk read-write control circuit does not allow the computer to read and write.
  • the main object of the present invention is to provide a computer hard disk read-write control device, which restricts the reading of data therebetween by simply setting the area between any two tracks of the computer hard disk as a protected area Writing, to achieve the purpose of protecting hard disk data, while greatly reducing the cost of the device.
  • the present invention provides a device for controlling read and write of a computer hard disk, which includes:
  • a legitimacy judging device configured to compare a track number stored in the device that reads, writes, and uses a track number with a first and last track number of a protected area set by the setting device Comparing whether the track number of the read-write operation falls within the protected area to determine whether the read-write operation is legal;
  • the illegal operation prohibition device is configured to allow the read / write operation to be performed when legal, and prohibited from performing the operation according to the result determined by the judging device.
  • the present invention has the advantages of achieving satisfactory protection of the hard disk data while reducing the cost of the device and simplifying the operation. Brief description of the drawings
  • FIG. 1 is a schematic diagram of a preferred embodiment of a hard disk read-write control device according to the present invention applied to a computer system;
  • FIG. 2 is a schematic diagram of a hard disk read-write control apparatus according to another embodiment of the present invention applied to a computer system. The best way to implement the invention
  • Fig. 1 shows a schematic diagram of a preferred embodiment of a hard disk read-write control device according to the present invention applied to a computer system.
  • FIG. 1 refers to a hard disk read-write control device according to the present invention, which includes a read-write operation track number register 1 1, a comparison circuit 1 2, a toggle switch 1 3, and a judgment logic module 1 4 , A decoding circuit 15, an OR gate 16 and a lock 17.
  • 2 refers to the computer bus
  • 3 refers to the hard disk adapter
  • 4 refers to the hard drive.
  • Read and write operation track number register 1 1 It is used to store the read and write track number obtained from the command sequence sent to the hard disk adapter when reading and writing from the computer.
  • 1 F 5, 1 F 4 (or 1 7 5, 1 7 4) are the IIO addresses of the hard disk read and write track numbers. In other hard disk interface standards, you can also use the command sequence Analyze the read and write track numbers.
  • Toggle switch 1 3 is used to set the first and last track number (track group) of the protected area of the hard disk.
  • the area between the two track numbers can actually be regarded as a logical disk.
  • Important files such as system files are stored between the two tracks or on the logical disk, and the hard disk cannot be read or written at will by the hardware protection. The most important data in your computer is uncorrupted.
  • a set of first and last track numbers can set a protected area. For simplicity, a protected area is often set from the head (or tail) of the disk. In this case, only one track number can be used to represent the protected area.
  • multiple track groups can be set by the toggle switch. Define multiple protected areas.
  • the comparison circuit 12 is used to compare the track number of the current read and write operation stored in the read and write operation track register with the first and last track numbers of the track group set by the toggle switch to determine the track of the read and write request. Whether the number falls within the set protected area, that is, it is judged whether the read / write request is legal, and the comparison result is sent to the judgment logic module 14.
  • the present embodiment is provided with a mechanical lock 17, the lock 17 is turned on when the control means even lose control, i.e., that the decision logic can always output as a signal the reader shoving, Conversely, the read-write control device can make the control function normally.
  • the decoding circuit 15 generally refers to a decoding circuit that may be used by the standby unit, because it is familiar to those skilled in the art and will not be repeated here.
  • the OR gate 16 is used as a read-write operation inhibiting component in this embodiment.
  • the judgment logic module 1 4 outputs a high-level signal
  • the output of the OR gate 16 is high-level
  • the level of the OR is When sent to the hard disk adapter 3, the read and write operation commands sent from the bus to the hard disk adapter can be blocked, thereby prohibiting reading and writing to the hard disk.
  • the judging logic module 1 4 finally determines whether the current read and write i request is legal according to the input of the comparator 1: and the lock 1 7, that is, whether it is a read and write i request to the protected area of the hard disk. When it is judged to be illegal, it outputs a high-level signal to cause the OR gate 16 to block read and write operations. Otherwise, it outputs a low-level signal to enable normal read and write operations.
  • a mechanical device such as a toggle switch 1 3 is used to set the first and last track numbers of the protected area, and the first and last track numbers can also be set electrically to set the protected area.
  • FIG. 2 is a schematic diagram of a hard disk read-write control device used in a computer system according to another embodiment of the present invention.
  • the same reference numerals in FIG. 2 as those in FIG. 1 refer to the same parts as those in FIG. 1 and they will not be described again.
  • Figure 2 differs from Figure 1 in that register 13 'is used to replace the toggle switch 13.
  • This register is used to store the track number group that defines the protected area of the hard disk. In this state, the first and last track numbers of the protected area are sent to this register 1 3 '. The best way is to put data into this register through application software when the computer starts up, and then turn off this advice so that its content cannot be changed at any time in the future. Of course, you can also set the password to change the contents of this register at any time after booting. ⁇ This will reduce the security of the hard disk.
  • the information (reading track number) used to determine the legitimacy of the read and write request sent by the computer is obtained from the bus when the computer sends a read and write command to the disk adapter.
  • the information can also be Taken from the cable between the hard disk adapter and the hard drive.
  • the use of the yoke read and write command to the hard disk adapter is prohibited, and illegal reading and writing is prohibited.
  • the data of the hard disk adapter is blocked from being transmitted to the hard disk drive (Such as connecting the output of the OR gate 16 to the hard disk drive) or generating a reset signal to the hard disk adapter so that the hard disk adapter cannot perform illegal work when the read / write status is illegal is prohibited.
  • the hard disk read-write control device of the present invention can be made into a single card, can also be used on a display card or a communication card, or can be combined with a kind of computer multimedia card to form a card, or it can be combined with a computer main board to form a card. ALL-IN-ONE main lever.
  • a better way recommended by the applicant is to make the hard disk read-write control device and the hard disk adapter of the present invention into a dedicated chip, that is, to manufacture a hard disk adapter unit that can judge whether the hard disk read-write operation is legal to determine whether to perform .
  • the device for controlling read and write operations of the hard disk has been described above, but the protection level of the hard disk protection area can be specifically selected through application software according to requirements, that is, unreadable and writable or readable and writable.

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Storage Device Security (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

Dispositif de gestion d'une opération de lecture-écriture sur un disque dur informatique (DD). Ce dispositif comporte une unité de sélection des numéros des première et dernière pistes magnétiques comprises dans une zone protégée du disque dur, une unité de stockage du numéro de la piste magnétique dans laquelle doit s'effectuer une opération de lecture-écriture; une unité de contrôle de légitimité destinée à déterminer si une demande de lecture-écriture sur disque dur s'applique à la zone protégée; et une unité d'interdiction de toute opération non autorisée, cette unité étant adaptée pour valider ou invalider l'opération de lecture-écriture sur disque dur en fonction du résultat du contrôle effectué par l'unité de contrôle de légitimité. Le dispositif peut déterminer l'étendue de la zone protégée tout simplement en sélectionnant les numéros d'une première et d'une dernière piste magnétique sur le disque dur, de manière à assurer la sécurité matérielle des données stockées dans la zone protégée.
PCT/CN1995/000010 1994-01-28 1995-01-28 Dispositif de gestion des operations de lecture-ecriture sur disque dur informatique WO1995020789A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU15740/95A AU1574095A (en) 1994-01-28 1995-01-28 Computer hardware disc read/write control device

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN94226656.0 1994-01-28
CN94226656 1994-01-28
CN94111461A CN1053507C (zh) 1994-10-07 1994-10-07 计算机硬盘读写控制装置
CN94111461.9 1994-10-07

Publications (1)

Publication Number Publication Date
WO1995020789A1 true WO1995020789A1 (fr) 1995-08-03

Family

ID=25743463

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN1995/000010 WO1995020789A1 (fr) 1994-01-28 1995-01-28 Dispositif de gestion des operations de lecture-ecriture sur disque dur informatique

Country Status (2)

Country Link
AU (1) AU1574095A (fr)
WO (1) WO1995020789A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3264615A (en) * 1962-12-11 1966-08-02 Ibm Memory protection system
EP0425771A2 (fr) * 1989-11-03 1991-05-08 International Business Machines Corporation Mécanisme efficace pour fournir des étendues de protection de mémoire à grain fin

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3264615A (en) * 1962-12-11 1966-08-02 Ibm Memory protection system
EP0425771A2 (fr) * 1989-11-03 1991-05-08 International Business Machines Corporation Mécanisme efficace pour fournir des étendues de protection de mémoire à grain fin

Also Published As

Publication number Publication date
AU1574095A (en) 1995-08-15

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