CN103824022B - Data clearing method and its electronic installation - Google Patents
Data clearing method and its electronic installation Download PDFInfo
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- CN103824022B CN103824022B CN201210464673.3A CN201210464673A CN103824022B CN 103824022 B CN103824022 B CN 103824022B CN 201210464673 A CN201210464673 A CN 201210464673A CN 103824022 B CN103824022 B CN 103824022B
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- 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
- G06F21/60—Protecting data
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/02—Addressing or allocation; Relocation
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Abstract
The present invention is on a kind of data clearing method and its electronic installation, and this method is cleared data the data of storage element with clearance order, and clearance order is stored in memory block, the described method comprises the following steps.Produce trigger event.Read the address information of memory block to obtain the address of memory block from basic input-output system unit.Clearance order is read from memory block in address according to memory block.Clearance order is transmitted to data storage element.Data storage element clears data the data in storage element according to clearance order.The electronic installation includes basic input-output system unit, processing unit, periphery chip unit, and data storage element.Accordingly, enable data obtain more tightly with data protection further, reduce data outflow risk.
Description
【Technical field】
The invention relates to a kind of method of data processing, and in particular to a kind of method that data confidentiality is removed
And its electronic installation.
【Background technology】
In the age that science and technology now is flourishing, store the electronic installation of data of all kinds turned into that people are in life can not
Or scarce information processing instrument.Especially computer system can meet people in work, the travelling need whole with amusement each side
Ask, more and more people handle miscellaneous data using computer system.For example, personal financial details, finance
Account number cipher, private file and photo, business documentation and intelligence creation etc. data, the hard disk of computer system can be stored
In.
But with the lifting of computer crime skill and quantity, user will face individual privacy data and leak and secret text
The threat of part outflow.Therefore how to prevent other people from arbitrarily opening, alter or even stealing various significant datas, be that mesh is previous very
Important and urgent the problem of.
Furthermore, the action that people can be deleted some data, but with regard to the deletion action in current computer system
Speech, and data that can not be storage in a hard disk are fully erased.If the archival location in hard disk is not made carbon copies, person who is ambitious or tenacious of purpose
As long as scholar rescues software by some common data, still can be easily data recovery.In addition, being just that hard disk is deleted
Archival location is made carbon copies, still can be by the magnetized physical characteristic of hard disk disk, and intentionally personage can deliver to the hard disk of acquirement such as mirror
Know the mechanism in laboratory etc, still have an opportunity part data convert by high-tech.As can be seen here, the secrecy of hard disc data
Property is filled with uncertainty in fact.
In general, in order to avoid deletion data by unworthy personage use, it is desired nonetheless to by aid or
Perform specific program thoroughly to clear data, to reach the effect of protection.But with the lifting of computer crime skill,
How an early step effectively block intentionally personage for the threat of data, even more one considerable problem.
【The content of the invention】
In view of this, the present invention provides a kind of data clearing method and its electronic installation, and electronic installation is stored in protect
In data security, it is to avoid the risk of data outflow.
The present invention provides a kind of data clearing method, it is adaptable to electronic installation, and a data storage is removed with a clearance order
The data of unit, and clearance order is stored in memory block, the method comprises the following steps.First, trigger event is produced.Connect
, from basic input output system（BIOS）Unit reads the address information of memory block to obtain the address of memory block, substantially
Input-output system unit stores basic input output system.Then, the address according to memory block is read clear from memory block
Except instruction.Furthermore, transmission clearance order to data storage element.Finally, data storage element clears data according to clearance order
Data in storage element.
The present invention provides a kind of electronic installation, including basic input-output system unit, processing unit, periphery chip list
Member, and data storage element.Wherein, the address information of basic input-output system unit storage memory block and basic input
Output unit, and clearance order is stored in memory block.Processing unit couples basic input-output system unit, works as trigger event
During generation, after the address information that processing unit reads memory block from basic input-output system unit, read from memory block
Clearance order.Periphery chip unit coupling processing unit.Processing unit transmits clearance order to data by periphery chip unit
After storage element, data storage element clears data the data in unit according to clearance order, and wherein periphery chip unit passes through
First connecting interface is connected with data storage element.
Based on above-mentioned, data clearing method and its electronic installation provided by the present invention are referred to by basic input output system
Clearance order is read in the memory block address that goes out, and data storage element removes this data storage list according to this clearance order
The data of member, the step of specific program thoroughly clears data is performed to save.Accordingly, data are enable to obtain more tightly with nearly one
The data protection of step, reduces the risk of data outflow.
【Brief description of the drawings】
Fig. 1 is the flow chart according to the data clearing method depicted in one embodiment of the invention.
Fig. 2 is the functional block diagram according to the electronic installation depicted in one embodiment of the invention.
Fig. 3 is the flow chart according to the data clearing method depicted in one embodiment of the invention.
Fig. 4 is the functional block diagram according to the electronic installation depicted in one embodiment of the invention.
Fig. 5 is according to the electronic installation and the functional block diagram of mobile memory device depicted in one embodiment of the invention.
Fig. 6 is the flow chart according to the data clearing method depicted in one embodiment of the invention.
Fig. 7 is the flow chart according to the data clearing method depicted in one embodiment of the invention.
【Embodiment】
In National Institute of Standards and Technology（National Institute of Standards
AndTechnology media cleanliness standard)（NIST 800-88) in, remove（Purging）Data are that one kind can resist experiment
The data safety of room level attack removes standard.And the present invention is i.e. clear by using basic input-output system unit reading data
Except instruction（Secure Erase Command）Address, and the number cleared data in storage element is instructed according to data dump
According to reach requirements of the NIST 800-88 to the standard of clearing data.In order that present disclosure becomes apparent, it is exemplified below
The example that embodiment can actually be implemented according to this as the present invention.
Fig. 1 is the flow chart according to the data clearing method depicted in one embodiment of the invention, and wherein this method is applied to
One electronic installation, the data of the data storage element in electronic installation are removed with a clearance order.And, described removing refers to
Order is stored in a memory block.
Fig. 1 is refer to, first, in step S110, trigger event is produced.Then, in step S130, from basic input
Output system unit reads the address information of a memory block to obtain the address of memory block.Then, in step S150, foundation
Clearance order is read from described memory block in the address of memory block.Furthermore, in step S170, transmission clearance order to number
According to storage element.Finally, in step S190, data storage element is cleared data the data in storage element with clearance order.
The functional block diagrams of Fig. 2 then for the electronic installation according to depicted in one embodiment of the invention.It refer to Fig. 2, electronics
Device 10 includes basic input-output system unit 110, processing unit 130, periphery chip unit 150, and data storage list
Member 170.The electronic installation 10 of the present embodiment can be desktop computer（Desktop PC）, notebook computer（Notebook PC）、
Ultra-thin computer（Ultra book）, tablet personal computer（TabletPC）, work station（Workstation）Deng device, herein not
Limit its scope.
Wherein, basic input-output system unit 110 is non-voltile memory（Non-volatile Memory）, for example
Read-only storage（Read Only Memory, ROM）Or flash memory（Flash Memory）, wherein storing for loading calculating
The most basic program code of machine system, i.e. basic input output system（BasicInput Output System, BIOS）.At this
In embodiment, basic input-output system unit 110 more stores the address information of a memory block in addition to storing BIOS,
And a clearance order is stored in this memory block.The provider location of this memory block then regard not be the same as Example be located at different device or
Mnemon, is described in detail hereinafter.
Processing unit 130, couples basic input-output system unit 110, can be microprocessor（micro-
processor）, embedded controller（embedded controller）Or central processing unit（central processing
unit,CPU）Deng for performing a plurality of instructions of computer erasable program.After trigger event is produced, processing unit 130
Read the address information of memory block to learn the address of memory block from basic input-output system unit 110, and from
Memory block reads clearance order.
Periphery chip unit 150 is, for example, South Bridge chip group, north bridge chipset or platform controller hub
（Platform Controller Hub, PCH) chipset.Periphery chip unit 150 couples processing unit 130, and passes through first
Connecting interface is connected with data storage element 170, in the present embodiment, and the first connecting interface can be high-tech configuration
（Advanced Technology Attachment,ATA）Interface or the configuration of tandem high-tech（Serial Advanced
Technology Attachment,SATA）Interface, the present invention is not limited this.
Data storage element 170, couples periphery chip unit 150, can be any type of storage device, such as rigid
Disc driver（Hard Disk Drive,HDD）, solid state hard disc（Solid State Disk,SSD）Deng.Work as processing unit
130 are transmitted after clearance order to data storage element 170 by periphery chip unit 150, and data storage element 170 is according to removing
Instruct the data in the storage element 170 that clears data.
Embodiments of the present invention are not limited to described above, for example, in the method for the invention, for producing triggering
For memory block where event and clearance order, all there are different embodiments, can be drunk for actual demand
Give the content of change above-described embodiment.
Fig. 3 is the flow chart of the data clearing method according to depicted in another embodiment of the present invention.It refer to Fig. 3, this reality
The method for applying example may be implemented in Fig. 2 electronic installation 10, and every component i.e. in collocation Fig. 2 illustrates data clearing method below
Step.It is noted that in the present embodiment, basic input output system can provide an operate interface.First, in step
In S310, processing unit 130 receives an operation signal from the operate interface of basic input output system.Specifically, in operation
Person is opened after electronic installation 10, and processing unit 130 can perform basic input output system.Start journey is performed in processing unit 130
During sequence, the program code being stored in basic input-output system unit 110 can make processing unit 130 control electronics dress
Put 10 display unit（Do not illustrate）An operate interface is shown, operator can input and wants the operation for being purged data letter
Number, notifier processes unit 130 performs the action cleared data according to this.Then, processing unit 130 just can be received from operate interface
This operation signal that operator is inputted.
For example, when operator opens electronic installation, the display of electronic installation will show an operate interface, and in
Inquire whether operator will clear data in this operate interface.The reply of operator is received by operate interface in processing unit
Afterwards, then the step of carry out data dump, operator is allowed to decide the opportunity cleared data in its sole discretion.
Then, in step S330, processing unit 130 reads memory block from basic input-output system unit 110
Address information is to learn the address of memory block.It should be noted that in the present embodiment, the memory block is located at substantially defeated
Enter in output system unit 110, for example, positioned at the read-only storage of storage basic input output system（Read only
memory,ROM）In.Then, in step S350, processing unit 130 according to memory block address from basic input and output system
The memory block of system unit 110 reads clearance order.
In step S370, processing unit 130 passes through periphery chip unit 150, transmission clearance order to data storage list
Member 170.Finally, in step S390, data storage element 170 clears data the number in storage element 170 according to clearance order
According to.Consequently, it is possible to can be before electronic installation 10 enters operating system, only just can be with logarithm evidence by basic input output system
The action that data in storage element 170 are purged, to avoid data outflow, enables data to obtain tighter data and protects
Shield.
Furthermore, it is necessary to which explanation, the memory block for having clearance order can be located at basic input-output system unit
（Such as basic input-output system unit 110）In, it can also be located in other mnemons of electronic installation, the present invention is not
To this limitation.
The functional block diagrams of Fig. 4 then for the electronic installation according to depicted in one embodiment of the invention.Fig. 4 is refer to, wherein
Coupling relation in electronic installation 10 between each unit refers to the explanation of embodiment illustrated in fig. 2, will not be described here.In this implementation
In example, electronic installation 10 further includes a mnemon 190.Mnemon 190 includes the memory block of storage clearance order.According to
This, reads the address information of memory block to learn memory field in processing unit 130 from basic input-output system unit 110
Behind the address of block, it will pass through periphery chip unit 150 from mnemon 190 to read clearance order.
It should be noted that in another embodiment of the invention, mnemon 190 and data storage element 170 can be
The same memory storage with memory function, such as hard drives（Hard Disk Drive,HDD）, solid state hard disc
（Solid State Disk,SSD）Deng.Mnemon 190 also can be other memory elements in electronic installation 10, be deposited Ru read-only
Reservoir, flash memory（Flash Memory）Or single burning internal memory（One Time Programming Memory,OTP Memory）
Deng of the invention that this is not limited.That is, memory block can be placed on electronic installation in itself except data storage element 170
Outside any memory element, can be the data storage element or other mnemons of another storage data,
User can set the address of clearance order to be stored according to its demand, and the method for making the present invention is more flexible.
In addition, trigger event also may include to perform an authentication procedure, and this authentication procedure fails.In simple terms, in this hair
In a bright embodiment, one authentication procedure is set in electronic installation in order to protect data.If operator can not pass through certification
Program, just starts the correlation step of the data clearing method described in performing, and to prevent his human desires to steal or change data, reaches really
Protect data safety and avoid the risk of data outflow.
Furthermore, it is necessary to which explanation, the memory block for having clearance order can be located at basic input-output system unit
（Such as basic input-output system unit 110）Or other mnemons（Such as mnemon 190）In, one can also be located at and moved
In dynamic storage device, the present invention is not limited to this.This memory block is then lifted below to be located in mobile memory device, and is taken
The embodiment for including authentication procedure with trigger event is described in detail.
Fig. 5 is the electronic installation and the functional block diagram of mobile memory device according to depicted in one embodiment of the invention.Please
Coupling relation in reference picture 5, wherein electronic installation 10 between each unit refers to the explanation of embodiment illustrated in fig. 2, herein not
Repeat.In the present embodiment, mobile memory device 20 passes through one second connecting interface and the periphery chip unit of electronic installation 10
150 connections.Wherein, mobile memory device can be memory card or side hard disk etc., and the present invention is not limited this.And multi-form
Mobile memory device be connected by its corresponding connecting interface with electronic installation, for example, Portable disk will be by general
Serial bus（UniversalSerial Bus,USB）Interface is connected with electronic installation.
Fig. 6 is the flow chart of the data clearing method according to depicted in another embodiment of the present invention.It refer to Fig. 6, this reality
The method for applying example may be implemented in Fig. 5 electronic installation 10 and mobile memory device 20, and every component i.e. in collocation Fig. 5 is said below
The step of bright data clearing method.First, in step S410, trigger event is produced.In the present embodiment, step S410 is more wrapped
Include processing unit 130 and perform authentication procedure（Step S411）, and processing unit 130 judge authentication procedure fail（Step
S412）Two steps.That is, when authentication procedure fails, each step of execution data clearing method will be started, for preventing
Only other people arbitrarily access the data in electronic installation 10.
Furthermore, authentication procedure（Step S411）The following steps can be more divided into and implement it.First, processing unit 130 passes through
The operate interface of basic input output system receives authentication data CI, and this authentication data CI includes a password（Step S4111）.
For example, the operator of electronic installation 10 inputs described password using operate interface.Then, processing unit 130 judges to receive
Password it is whether correct（Step S4112）.If the password received is correct, processing unit 130 continues executing with boot program,
And allow operator to access the data in data storage element 170（Step S420）.If the password received is mistake, processing
Unit 130 shows error message EI by the operate interface of basic input output system, for example " Password Input mistake ".Meanwhile,
Processing unit 130 increases the accumulation numerical value of mistake numeration once（Step S4113）.
Then, whether the accumulation numerical value of the misjudgment of processing unit 130 numeration is more than default value（Step S4114）.If wrong
When the accumulation numerical value of misdescription number is less than default value, then step S4111 is returned to, processing unit 130 continues through basic input and output
The operate interface of system receives other authentication data CI.If total accumulation numerical value of mistake numeration is more than default value, step is subsequently entered
Rapid S412, processing unit 130 judges that authentication procedure fails, and execution each step described later that continues.Pass through the setting of default value
It can avoid the password when operator's imprudence input error, and the result of unexpected error starting data dump.And the number of default value
It is worth and is set for a positive integer, such as 3 or 5, foundation status of implementation.
Trigger event is being produced, that is, processing unit is judged after authentication procedure failure, in step S430, processing unit
130 read the address information AD of memory block to learn the address of memory block from basic input-output system unit 110.Need
It is noted that in the present embodiment, the memory block is located in mobile memory device 20, and mobile memory device 20 passes through the
Two connecting interfaces（Such as USB interface）It is connected with periphery chip unit 150.In step S440, periphery chip unit 150 is initialized
Connect the second connecting interface of mobile memory device 20 so that processing unit can pass through periphery chip unit 150 and second
Memory block on connecting interface access mobile memory device 20.
Then, in step S450, the address that processing unit 130 is learnt according to the address information AD of memory block, from
The memory block of mobile memory device 20 reads clearance order EC.Furthermore, in step S460, processing unit 130 passes through periphery
The connecting interface of chip unit 150 and first, transmission clearance order EC to data storage element 170.Finally, in step S470
When, data storage element 170 clears data the data in storage element 170 according to clearance order EC.Wherein in the present embodiment,
Clearance order is that can reach foregoing NIST 800-88 to instruct the data dump for the standard requirement that clears data.
In general, data are typically to need most to be protected when electronic installation holder is not by electronic installation.Cause
This electronic installation holder can be when leaving electronic installation, or when having significant data to need protection, connection has clear
Except instruction mobile memory device on the electronic device, make other people before being intended to steal or changing data, remove in advance described
Data, reach the purpose of data protection.When not needing data confidentiality to remove protection, electronic installation holder can be not connected to this and deposit
There is the mobile memory device of clearance order on the electronic device, in order to avoid weight is removed because of imprudence log-on data sweep-out method
The data wanted, lifting data clearing method uses upper elasticity.
In addition it should be noted that, authentication procedure can be by basic input-output system unit receive authentication data,
Authentication procedure can be performed by a mobile memory device.For such a situation, the present invention also provides corresponding method, with
Separately it is explained for an embodiment down.
Fig. 7 is the flow chart of the data clearing method according to depicted in one embodiment of the invention.Fig. 7 and Fig. 4 are refer to, it is first
First, in step S510, trigger event is produced.In the present embodiment, step S510 includes the mobile storage of the execution of processing unit 130
Device authentication program (step S511), the week that wherein mobile memory device 20 is connected by the second connecting interface with electronic installation 10
Side chip unit 150 is connected.
For example, if data in operator's personal computer to be accessed, it is necessary to pass through and link correct mobile storage
Cryopreservation device 20 can just proceed by the access of data on personal computer.For example in the present embodiment, periphery chip unit
After 150 the second connecting interfaces of initialization, processing unit 130 obtains authentication data from above-mentioned correct mobile memory device 20.
Otherwise, in step 512, processing unit 130 judges that authentication procedure fails.
Then in step S530, processing unit 130 reads the ground of memory block from basic input-output system unit 110
Location information AD with memory block address.It should be noted that in the present embodiment, the memory block is located at basic input
In output system unit 110.In step S550, the ground that processing unit 130 is learnt according to the address information AD of memory block
Clearance order EC is read from the memory block of basic input-output system unit 110 in location.Then, in step S570, processing is single
Member 130 transmits clearance order EC to data storage element 170 by periphery chip unit 150.Finally, in step S590, number
The data cleared data according to storage element 170 according to clearance order EC in storage element 170.
In summary, believe the address that the present invention reads data dump instruction by using basic input-output system unit
Breath, and instruct the data in (the Secure Erase Command) storage element that clears data according to data dump, it is not necessary to pass through
The purpose that data confidentiality is removed is reached by the execution of specific program, the possibility of data recovery is also reduced.In addition, the present invention is more
By authentication procedure, such as using cryptoguard, or the mode such as mobile memory device certification, allow data to peep in his human desires,
Steal before even modification, cleared data in advance by clearance order, to avoid data outflow, data is obtained tighter
Data protection.
Claims (7)
1. a kind of data clearing method a, it is adaptable to electronic installation, the data of a data storage element are removed with a clearance order,
The clearance order is stored in a memory block, it is characterised in that including：
One mobile memory device is provided, the mobile memory device is connected by a connecting interface with the electronic installation to carry out one
Authentication procedure, and the memory block is in the mobile memory device；
One processing unit of the electronic installation judges the authentication procedure failure of the mobile memory device；
Read the address information of the memory block to obtain the internal memory from a basic input-output system unit of the electronic installation
The address of block, the basic input-output system unit stores a basic input output system；
The clearance order is read from the memory block in address according to the memory block；
The clearance order is transmitted to the data storage element；And
The data storage element removes the data in the data storage element according to the clearance order.
2. data clearing method as claimed in claim 1, it is characterised in that the memory block is located at the basic input and output
In system unit.
3. data clearing method as claimed in claim 1 a, it is characterised in that processing unit of the electronic installation judges
Further included before the authentication procedure failure of the mobile memory device：
Initialize the connecting interface.
4. data clearing method as claimed in claim 1, it is characterised in that the authentication procedure includes：The processing unit from
An authentication data is read in the mobile memory device.
5. a kind of electronic installation, it is characterised in that including：
One basic input-output system unit, stores the address information and a basic input output system of a memory block, this is interior
Deposit and a clearance order is stored in block；
One processing unit, couples basic input-output system unit, when a mobile memory device is connected with the electronic installation to enter
The authentication procedure of row one, the processing unit judges the authentication procedure success or failure of the mobile memory device；
One data storage element, stores a data；And
One periphery chip unit, couples the processing unit and is connected by one first connecting interface with the data storage element；
Wherein, the memory block be located at a mobile memory device in, the mobile memory device by one second connecting interface with
The periphery chip unit connection；
Wherein, when the authentication procedure fails, the processing unit reads the memory block from the basic input-output system unit
After address information, the clearance order is read from the memory block, the clearance order is transmitted to the number by the periphery chip unit
After storage element, the data storage element removes the data according to the clearance order.
6. electronic installation as claimed in claim 5, it is characterised in that before carrying out the authentication procedure, the periphery chip unit
Initialization connects second connecting interface of the mobile memory device.
7. electronic installation as claimed in claim 5, it is characterised in that the authentication procedure includes：From the mobile memory device
One authentication data of middle reading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201210464673.3A CN103824022B (en) | 2012-11-19 | 2012-11-19 | Data clearing method and its electronic installation |
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|---|---|---|---|
| CN201210464673.3A CN103824022B (en) | 2012-11-19 | 2012-11-19 | Data clearing method and its electronic installation |
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| CN103824022B true CN103824022B (en) | 2017-07-28 |
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| CN104252373B (en) * | 2014-10-17 | 2018-04-10 | 北京奇虎科技有限公司 | Remove the method and device of application data |
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| CN101620651A (en) * | 2008-07-01 | 2010-01-06 | 联想(北京)有限公司 | Method and device for clearing data in computer |
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| JP2005018415A (en) * | 2003-06-26 | 2005-01-20 | Toshiba Corp | Information processor and data erasing method used in the same |
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| CN1324027A (en) * | 2000-05-13 | 2001-11-28 | 苏毅 | Method of preventing data transmission via memory unit in computer mainboard while turning on the computer |
| CN1812477A (en) * | 2005-01-25 | 2006-08-02 | 京瓷美达株式会社 | Data forming device and data safety management method |
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| CN101620651A (en) * | 2008-07-01 | 2010-01-06 | 联想(北京)有限公司 | Method and device for clearing data in computer |
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