CN110874495B - Solid state disk based on automatic locking write protection function and tamper-proof method - Google Patents
Solid state disk based on automatic locking write protection function and tamper-proof method Download PDFInfo
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- CN110874495B CN110874495B CN201811015555.8A CN201811015555A CN110874495B CN 110874495 B CN110874495 B CN 110874495B CN 201811015555 A CN201811015555 A CN 201811015555A CN 110874495 B CN110874495 B CN 110874495B
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- 239000007787 solid Substances 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims description 21
- 230000003993 interaction Effects 0.000 claims abstract description 4
- 230000002265 prevention Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 241000700605 Viruses Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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- 230000035939 shock Effects 0.000 description 1
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Classifications
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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
- G06F21/70—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
- G06F21/79—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 semiconductor storage media, e.g. directly-addressable memories
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Computer Security & Cryptography (AREA)
- Computer Hardware Design (AREA)
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Storage Device Security (AREA)
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Abstract
The invention discloses a solid state disk based on an automatic locking write-protection function, which comprises: the singlechip is used for receiving a locking instruction sent by the upper computer; the switch control circuit is used for receiving a starting instruction of the singlechip and outputting a locking signal; and the hard disk controller is used for carrying out data interaction with the upper computer, closing the data writing function of the solid state disk when the data writing function receives the locking signal sent by the switch control circuit, locking the file data of the solid state disk, and displaying the system cache data as the file data when an unauthorized person operates the file data through the upper computer, wherein the unauthorized person only operates the cache data in the system operation without affecting the file data stored in the solid state disk. Based on the principle, the invention realizes effective prevention of intrusion of unauthorized personnel, and can prevent damage to data at the same time, thereby improving safety and reliability.
Description
Technical Field
The invention relates to a solid state disk data protection method, in particular to a solid state disk based on an automatic locking write protection function and a tamper-proof method.
Background
The solid state disk is also called an electronic hard disk or a solid state electronic disk, and is a hard disk composed of a control unit and a solid state storage unit. The interface specification, definition, function and using method of the solid state disk are the same as those of a common hard disk, and the appearance and the size of the product are the same as those of the common hard disk. Because the solid state disk does not have a rotating medium of a common hard disk, the shock resistance is excellent. The working temperature range of the chip is wide (-40-85 ℃). The method is widely applied to the fields of military, vehicle-mounted, industrial control, video monitoring, network terminals, electric power, medical treatment, aviation, navigation equipment and the like.
With the rapid spread of electronic computers, a series of products which endanger the safety of computer systems, such as hackers, computer viruses, computer trojans and the like, are also accompanied, and the aim of the attacks is to make the computer systems run with diseases or completely break down due to the data in the hard disk of the computer. In particular, in the idle state of the computer, the data in the hard disk is easy to be checked and rewritten, so that how to prevent the data of the hard disk from being modified, deleted and rewritten becomes the aim of the hard disk protection system.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the solid state disk based on the automatic locking write protection function and the tamper-proof method which can effectively prevent the invasion of unauthorized personnel and damage the data, thereby improving the safety and the reliability.
In order to solve the technical problems, the invention adopts the following technical scheme.
A solid state disk based on automatic locking write protection function, it includes: the singlechip is connected with the upper computer and is used for receiving a locking instruction sent by the upper computer; the switch control circuit is connected with the singlechip and is used for receiving a starting instruction of the singlechip and outputting a locking signal; the hard disk controller is connected with the upper computer and the switch control circuit, and is used for carrying out data interaction with the upper computer, and closing the data writing function of the solid state disk when the hard disk controller receives a locking signal sent by the switch control circuit, locking file data of the solid state disk, displaying system cache data as file data when an unauthorized person operates the file data through the upper computer, and only operating the cache data in the system operation without affecting the file data stored in the solid state disk.
Preferably, it includes: the clock module is connected with the singlechip and is used for timing or feeding back a release signal to the singlechip after timing to a preset time.
Preferably, the singlechip is connected to a serial port of the upper computer through a USB-to-RS 232 cable.
Preferably, the locking signal sent by the switch control circuit to the hard disk controller is a low level signal.
Preferably, when the clock module feeds back a release signal to the singlechip, the singlechip stops sending a start instruction to the switch control circuit, and the switch control circuit stops outputting a locking signal so as to enable the hard disk controller to recover a data writing function.
The method is realized based on a solid state disk and an upper computer, wherein the solid state disk comprises a single chip microcomputer, a switch control circuit and a hard disk controller, the switch control circuit is connected with the single chip microcomputer, and the hard disk controller is connected with the upper computer and the switch control circuit, and the method comprises the following steps: step S1, the upper computer sends a locking instruction to the singlechip; step S2, the singlechip sends a starting instruction to a switch control circuit; step S3, the switch control circuit outputs a locking signal to the hard disk controller; and S4, closing the data writing function of the solid state disk when the hard disk controller receives the locking signal, locking file data of the solid state disk, and displaying the system cache data as file data when an unauthorized person operates the file data through an upper computer, wherein the unauthorized person only operates the cache data in the system operation without affecting the file data stored in the solid state disk.
Preferably, the solid state disk includes a clock module, the clock module is connected to the singlechip, and the method includes a releasing step: when the clock module counts or times to a preset time, a release signal is fed back to the singlechip, and when the clock module feeds back the release signal to the singlechip, the singlechip stops sending a starting instruction to the switch control circuit, and the switch control circuit stops outputting a locking signal so as to enable the hard disk controller to recover a data writing function.
Preferably, the locking instruction sent by the upper computer is a preset key value of a keyboard of the upper computer or a computer command generated by the upper computer.
Preferably, in step S4, after restarting the host computer, the host computer accesses file data that is not tampered in the solid state disk.
Preferably, in step S4, the upper computer is preset with a virtual cache, and when the hard disk controller closes the data writing function of the solid state disk, the solid state disk operates under the virtual cache of the upper computer.
In the solid state disk based on the automatic locking write protection function disclosed by the invention, when a user leaves, an upper computer can be utilized to send a locking instruction to a singlechip, then the singlechip sends a starting instruction to a switch control circuit, and then the switch control circuit outputs a locking signal to a hard disk controller, and the hard disk controller receives the locking signal and closes the data writing function of the solid state disk. Based on the principle, the invention realizes effective prevention of intrusion of unauthorized personnel, and can prevent damage to data at the same time, thereby improving safety and reliability.
Drawings
FIG. 1 is a circuit block diagram of a solid state disk of the present invention.
Fig. 2 is a schematic diagram of an internal structure of the solid state disk of the present invention.
Fig. 3 is a schematic diagram of the design of the single-chip microcomputer unit control switch unit.
Fig. 4 is a schematic diagram of a GPIO port of a hard disk controller.
Fig. 5 is a schematic diagram of a clock chip design.
FIG. 6 is a flow chart of a tamper resistant method of the present invention.
Detailed Description
The invention is described in more detail below with reference to the drawings and examples.
The invention discloses a solid state disk based on an automatic locking write protection function, which is shown in combination with figures 1 to 5, and comprises:
the singlechip U2 is connected with the upper computer, and the singlechip U2 is used for receiving a locking instruction sent by the upper computer;
the switch control circuit U4 is connected to the singlechip U2, and the switch control circuit U4 is used for receiving a starting instruction of the singlechip U2 and outputting a locking signal;
the hard disk controller U1 is connected with the upper computer and the switch control circuit U4, the hard disk controller U1 is used for carrying out data interaction with the upper computer, and when receiving a locking signal sent by the switch control circuit U4, the hard disk controller U1 closes the data writing function of the solid state disk, locks file data of the solid state disk, and when an unauthorized person operates the file data through the upper computer, the system cache data is displayed as file data, and the unauthorized person only operates the cache data in the system operation without affecting the file data stored in the solid state disk;
the clock module U3 is connected to the single-chip microcomputer U2, and the clock module U3 is used for timing or feeding back a release signal to the single-chip microcomputer U2 after timing to a preset time.
In the solid state disk, when a user leaves, the upper computer can be used for sending a locking instruction to the singlechip U2, then the singlechip U2 sends a starting instruction to the switch control circuit U4, the switch control circuit U4 outputs a locking signal to the hard disk controller U1, and the hard disk controller U1 receives the locking signal and closes the data writing function of the solid state disk. Based on the principle, the invention realizes effective prevention of intrusion of unauthorized personnel, and can prevent damage to data at the same time, thereby improving safety and reliability.
In this embodiment, the clock module U3 is preferably provided, and under the action of the clock module U3, a time point for removing protection is provided for the hard disk, so that the state of the hard disk is controllable, and in addition, the user can also automatically contact and protect through operating the upper computer.
In this embodiment, the single-chip microcomputer U2 is connected to a serial port of the upper computer through a USB-to-RS 232 cable.
Further, the lock signal sent by the switch control circuit U4 to the hard disk controller U1 is a low level signal.
As an application example, the code of the singlechip control switch circuit is as follows:
as a preferred mode, when the clock module U3 feeds back a release signal to the single-chip microcomputer U2, the single-chip microcomputer U2 stops sending a start command to the switch control circuit U4, and the switch control circuit U4 stops outputting a locking signal to enable the hard disk controller U1 to resume the function of writing data.
As an example of an application, the code of the clocked switching circuit is as follows:
sleep_s.exe 30000
sleep_s.exe 30000
mode COM4:9600,N,8,1
:Loop
sleep_s.exe 30
mode COM4DTR＝off
sleep_s.exe 30
mode COM4DTR＝on
goto Loop。
the invention utilizes various clock output functions and interrupt output functions to obtain the electronic disk capable of completing various complex clock output and locking functions, and the electronic disk comprises a controller part, a data storage part, a multifunctional clock/calendar chip module and a switch control circuit. The invention is based on the original solid state disk design circuit, a clock control chip is additionally arranged, the clock chip starts to time according to the internal instruction of the singlechip, and the switching power supply controls the solid state disk controller to realize the feasible operations of data writing, reading, deleting and the like when controlling the solid state disk to work. The time program can be designed according to the application requirement to achieve the purposes of controlling the data writing of the solid state disk during work under specific conditions, automatically locking the write protection function of the hard disk, and only reading, and not writing or deleting the data files in the original hard disk. The switch control circuit is activated by the singlechip through a specific special key of a preset keyboard or through an instruction written in the singlechip in advance, the switch control circuit unit enables low level to the controller P11GPIO, when someone intentionally deletes or falsifies computer data, the computer data can be correspondingly changed, illegal operators are effectively shielded, but after the legal operators wait for the preset time, the computer data is restored to the original state before illegal falsification after the switch control circuit is released.
In order to better describe the technical scheme of the invention, the invention also discloses a tamper-proof method based on an automatic locking write-protection function, which is realized based on a solid state disk and an upper computer, and is combined with the method shown in fig. 1 and 6, wherein the solid state disk comprises a singlechip U2, a switch control circuit U4 and a hard disk controller U1, the switch control circuit U4 is connected with the singlechip U2, the hard disk controller U1 is connected with the upper computer and the switch control circuit U4, and the method comprises the following steps:
step S1, the upper computer sends a locking instruction to a singlechip U2;
step S2, the singlechip U2 sends a starting instruction to the switch control circuit U4;
step S3, the switch control circuit U4 outputs a locking signal to the hard disk controller U1;
and S4, closing the data writing function of the solid state disk when the hard disk controller U1 receives the locking signal, locking file data of the solid state disk, and displaying the system cache data as file data when an unauthorized person operates the file data through an upper computer, wherein the unauthorized person only operates the cache data in the system operation without affecting the file data stored in the solid state disk.
In the above method, the solid state disk includes a clock module U3, the clock module U3 is connected to the single chip microcomputer U2, and the method includes a releasing step: when the clock module U3 counts or times to a preset time, a release signal is fed back to the singlechip U2, and when the clock module U3 feeds back the release signal to the singlechip U2, the singlechip U2 stops sending a starting instruction to the switch control circuit U4, and the switch control circuit U4 stops outputting a locking signal so as to enable the hard disk controller U1 to recover a data writing function.
In step S1, the lock instruction sent by the upper computer is a preset key value of the keyboard of the upper computer or a computer command generated by the upper computer.
In step S4, after restarting the upper computer, the upper computer may access the file data that is not tampered in the solid state disk.
In addition, in step S4, the upper computer is preset with a virtual cache, and when the hard disk controller U1 closes the data writing function of the solid state disk, the solid state disk operates under the virtual cache of the upper computer.
The invention discloses a solid state disk based on an automatic locking write-protection function and a tamper-proof method, wherein the clock function designed on the basis of the solid state disk is a multifunctional clock/calendar chip with extremely low power consumption by using a real-time clock chip. The technology can be added with various developed alarm functions, timer functions, clock output functions and interrupt output functions, so that the technology can complete various complex timing services, and can even provide a watchdog function for the solid state disk. In addition, when the switch circuit unit starts low level to the controller P11GPIO, the locked solid state disk runs under the virtual cache of the system, file data of the solid state disk is already locked, and file data of unauthorized personnel in operation is only cache files in the running process of the system and files in the hard disk cannot be affected. Therefore, unauthorized personnel can be effectively shielded, and the data is damaged.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention, and modifications, equivalent substitutions or improvements made within the technical scope of the present invention should be included in the scope of the present invention.
Claims (2)
1. The utility model provides a solid state disk based on automatic locking write protection function which characterized in that includes:
the singlechip (U2) is connected with the upper computer, and the singlechip (U2) is used for receiving a locking instruction sent by the upper computer;
the switch control circuit (U4) is connected with the singlechip (U2), and the switch control circuit (U4) is used for receiving a starting instruction of the singlechip (U2) and outputting a locking signal;
the hard disk controller (U1) is connected with the upper computer and the switch control circuit (U4), the hard disk controller (U1) is used for carrying out data interaction with the upper computer, closing the data writing function of the solid state disk when the hard disk controller receives a locking signal sent by the switch control circuit (U4), locking file data of the solid state disk, and displaying system cache data as file data when an unauthorized person operates the file data through the upper computer, wherein the unauthorized person only operates the cache data in the system operation without affecting the file data stored in the solid state disk;
the clock module (U3) is connected with the singlechip (U2), and the clock module (U3) is used for timing or feeding back a release signal to the singlechip (U2) after timing to a preset time;
the singlechip (U2) is connected to a serial port of the upper computer through a USB-to-RS 232 cable;
the locking signal sent by the switch control circuit (U4) to the hard disk controller (U1) is a low-level signal;
when the clock module (U3) feeds back a release signal to the singlechip (U2), the singlechip (U2) stops sending a starting instruction to the switch control circuit (U4), and the switch control circuit (U4) stops outputting a locking signal so as to enable the hard disk controller (U1) to recover a data writing function;
the locking instruction sent by the upper computer is a preset key value of an upper computer keyboard.
2. The tamper-proof method based on the automatic locking write-protection function is characterized by being realized based on a solid state disk and an upper computer, wherein the solid state disk comprises a single chip microcomputer (U2), a switch control circuit (U4) and a hard disk controller (U1), the switch control circuit (U4) is connected with the single chip microcomputer (U2), and the hard disk controller (U1) is connected with the upper computer and the switch control circuit (U4), and the method comprises the following steps:
step S1, the upper computer sends a locking instruction to a singlechip (U2);
step S2, the singlechip (U2) sends a starting instruction to the switch control circuit (U4);
step S3, the switch control circuit (U4) outputs a locking signal to the hard disk controller (U1);
step S4, when the hard disk controller (U1) receives the locking signal, closing the data writing function of the solid state disk, locking file data of the solid state disk, and when an unauthorized person operates the file data through an upper computer, displaying system cache data as file data, wherein the unauthorized person only operates the cache data in the system operation without affecting the file data stored in the solid state disk;
the solid state disk comprises a clock module (U3), wherein the clock module (U3) is connected with a singlechip (U2), and the method comprises the following steps: when the clock module (U3) counts or times to a preset time, a release signal is fed back to the singlechip (U2), and when the clock module (U3) feeds back the release signal to the singlechip (U2), the singlechip (U2) stops sending a starting instruction to the switch control circuit (U4), and the switch control circuit (U4) stops outputting a locking signal so as to enable the hard disk controller (U1) to recover a data writing function;
the locking instruction sent by the upper computer is a preset key value of an upper computer keyboard;
in the step S4, after restarting the upper computer, the upper computer accesses file data which is not tampered in the solid state disk;
in step S4, the upper computer is preset with a virtual cache, and when the hard disk controller (U1) closes the data writing function of the solid state disk, the solid state disk operates under the virtual cache of the upper computer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811015555.8A CN110874495B (en) | 2018-08-31 | 2018-08-31 | Solid state disk based on automatic locking write protection function and tamper-proof method |
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| CN201811015555.8A CN110874495B (en) | 2018-08-31 | 2018-08-31 | Solid state disk based on automatic locking write protection function and tamper-proof method |
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| CN110874495B true CN110874495B (en) | 2024-02-27 |
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| CN113434322B (en) * | 2021-06-25 | 2023-03-21 | 上海威固信息技术股份有限公司 | Solid state disk safety management method based on watchdog |
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