CN1176427A

CN1176427A - Selective keyboard write-in protector

Info

Publication number: CN1176427A
Application number: CN 97115028
Authority: CN
Inventors: 谢用富; 汪德秋
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-07-24
Filing date: 1997-07-24
Publication date: 1998-03-18

Abstract

The selective hard disc write-in protector includes parameter memory part, current parameter registers, control part and authorizing part. The said device may be mounted in single card or integrated into semiconductor chip, which is then mounted in drive circuit. The authorized operator can enable some area of hard disc to become inhibit write-in or inhibit write-in and read-out while the rest area being normal for read and write operation.

Description

Selective keyboard write-in protector

The present invention relates to the computer auxiliary memory field.

Necessity and the superiority of hard disk in computer system is: 1. along with the continuous expansion of software capacity, increasing software must be installed on the hard disk and could move, and the high-capacity positive of hard disk is suitable for this requirement; 2. hard disk visit is high-speed, for operating personnel and large program operation provide suitable hardware environment; 3. hard disk, the particularly low price of hard disc equipment make it obtain popularization and application widely.As seen hard disk is indispensable in computer system, and is very important.Yet its hardware configuration of present hard disk is a full open model, thereby causes following defective: 1. between the illegal visit of unauthorized person for hard disk, make it illegally consult hard disk information, cause giving away secrets; 2. can illegally write dish (deletion, modification, interpolation etc.), cause system disorders even destroyed; 3. since computer virus usually with hard disk as target of attack, cause hard disk become virus main parasitic carrier and communication media.This shows that the security of hard disk can't be protected.

The objective of the invention is to remedy the above-mentioned defective that current hard disk exists, a kind of selective keyboard write-in protector is provided, promptly read/write device is forbidden/allowed to the hard disk selectivity.This device can prevent that the hard disk areas of defined from illegally being read dish, illegally writing dish.

So-called selectivity among the present invention, its implication is: 1. parameter selectivity, parameter mean a certain legal elements in the hard disk address space key element (post number, No.1, area code), as post number; Or the legal combination of these key elements, as post number and No.1 and combination area code, these legal elements or combination, the authorized person can select to set.And selecteed concrete parameter value should be significant, for example can not surpass each key element span of stipulating in the actual hard disk.2. operation is alternative, mean that the authorized person can select to forbid/allow read/write operation to the hard disk areas of above-mentioned parameter regulation, and whether can make above-mentioned selection operate in this zone effectively or make this zone enter normal condition (promptly allow to read and allow to write state, down with).For example, the hard disk areas of above-mentioned parameter regulation is selected to forbid writing, perhaps select to forbid reading and forbid writing, and their logical combination, this zone is entered normally.

Read/write is forbidden/allowed to what is called among the present invention, and its implication is to forbid reading or forbid writing, or allows to read or allow to write, or the significant combination of above-mentioned four kinds of operations.

The objective of the invention is to adopt following measure to realize:

Selective keyboard write-in protector comprises parameters memorizing parts, parameter current registers group, control assembly, mandate parts, parameters memorizing parts: can deposit the hard disk address parameter of the read/write that is under an embargo/allows and forbid/allow the read/write operation code, also can be reduced to and be used for depositing above-mentioned two one; Parameter current registers group: the parameter current that can deposit hard disk; Control assembly: can be according to the parameter current and the Host Command of the content and the parameter current registers group of parameters memorizing parts, control forbids/allows whether read/write operation is carried out, and also can have the effect of forbidding/allow the read/write operation code of depositing; Authorize parts: be used for the authorized person whether the selection zone of parameter is in to forbid/allows whether hard disk areas that read/write selects and control selected parameter to stipulate is in forbids/allow the read/write effective status, also can be reduced to some the effect that has in above-mentioned three.

The present invention compared with prior art has following effect:

1. the authorized person can select the hard disk areas of parameter regulation to be in to forbid writing state, and at this moment, any operator can not carry out writing disk manipulation to this zone, has also prevented pollution, destruction and the parasitism of computer virus to the regulation zone; 2. the authorized person can select the hard disk areas of parameter regulation to be in to forbid reading and forbid writing state, and at this moment, any operator can not carry out the read-write discs operation to this zone, prevents from illegally to write dish; 3. the realization multizone of can rising in rebellion is controlled respectively; 4. be applicable to the multiple interfaces standard; 5. the present invention can make chip-scale or plug-in card level product.

The invention will be further described below in conjunction with accompanying drawing:

Fig. 1 is that a kind of hard disk of the present invention selects the zone to forbid/allow the read/write control chart

Fig. 2 is that another kind of hard disk of the present invention selects the zone to forbid/allow the read/write control chart

Fig. 3 is that a kind of card-level hard disk of the present invention forbids writing control chart

With reference to Fig. 1

The authorized person obtains right to choose by authorizing parts, with software command or hardware setting, will forbid/allow read/write energy number and forbid/allow that the read/write operation code deposits parameters memorizing parts (operation code also can deposit control assembly in) in.During the hard disk operation, the parameter current of the continuous variation in the parameter current registers group acts on the parameters memorizing parts, the order that control assembly is sent according to above-mentioned exercising result and main frame, selected to make the hard disk areas of selected parameter regulation to be in the authorized person and forbidden/allows under the effective situation of read/write, finished and select the zone to forbid/allow that read/write controls hard disk.If the authorized person selects to control above-mentioned hard disk areas and enters normal condition, then should no longer be forbidden/be allowed the control of read/write in the zone.

With reference to Fig. 2

The authorized person obtains right to choose by authorizing parts, with software command or hardware setting, will forbid/allow read/write energy number and forbid/allow that the read/write operation code deposits parameters memorizing parts (operation code also can deposit control assembly in) in.During the hard disk operation, parameter in the parameter current of the continuous variation in the parameter current registers group and the parameters memorizing parts enters control assembly, the order that control assembly also will be sent according to main frame, selected to make the hard disk areas of selected parameter regulation to be in the authorized person and forbidden/allows under the effective situation of read/write, finished and select the zone to forbid/allow that read/write controls hard disk.If the authorized person selects to control above-mentioned hard disk areas and enters normal condition, then should no longer be forbidden/be allowed the control of read/write in the zone.

With reference to Fig. 3

If the authorized person selects to forbid that by U1 (top is connected among the figure with imitating, the below disconnects) and in U2, configure parameter value (post number value), when main frame will be visited hard disc, main frame writes the hard disc address that will visit (post number) currency in the hard disk drive center pillar registers group by going into signal cable, also same parameter value is write among the U4 of this card simultaneously by U3 and data bus, U5 compares the numerical value from U2 and U4, if the parameter current value of U4 is the scope of parameter value regulation (the 0 post number value to setting in U2 not, down together), then U5 will go into signal cable and go out signal cable to connect, make in the scope of parameter current value regulation among the U4, then U5 judges the operational order from main frame, if read command, then make into signal cable and go out signal cable and connect, if write order is then used the relevant invalidating signal of signal cable, forbid the purpose write thereby reach.

Claims

1, a kind of selective keyboard write-in protector, it is characterized in that described write protector comprises parameters memorizing parts, parameter current registers group, control assembly, mandate parts, parameters memorizing parts: can deposit the hard disk address parameter of the read/write that is under an embargo/allows and forbid/allows the read/write operation code, also can be reduced to and be used for depositing above-mentioned two firmly one; Parameter current registers group: the parameter current that can deposit hard disk; Control assembly: can be according to the parameter current and the Host Command of the content and the parameter current registers group of parameters memorizing parts, control forbids/allows whether read/write operation is carried out, and also can have the effect of forbidding/allow the read/write operation code of depositing; Authorize parts: be used for the authorized person whether the selection zone of parameter is in to forbid/allows whether hard disk areas that read/write selects and control selected parameter to stipulate is in forbids/allow the read/write effective status, also can be reduced to some the effect that has in above-mentioned three.

2, selective keyboard write-in protector according to claim 1 is characterized in that described parameters memorizing parts are semiconductor memory devices, or the mechanical coding switch.

3, selective keyboard write-in protector according to claim 1 is characterized in that described mandate parts are electronic switches, or mechanical switch, perhaps code switch, or semiconductor memory device.

4, selective keyboard write-in protector according to claim 1 is characterized in that described write protector can be installed on the card, also can be integrated in the semi-conductor chip.