CN110968531B - Data destruction method, system and device for SSD - Google Patents
Data destruction method, system and device for SSD Download PDFInfo
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- CN110968531B CN110968531B CN201911184282.4A CN201911184282A CN110968531B CN 110968531 B CN110968531 B CN 110968531B CN 201911184282 A CN201911184282 A CN 201911184282A CN 110968531 B CN110968531 B CN 110968531B
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- 230000008569 process Effects 0.000 claims description 22
- 239000000126 substance Substances 0.000 claims description 7
- 238000004590 computer program Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000002955 isolation Methods 0.000 description 5
- 239000002253 acid Substances 0.000 description 4
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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
- G06F12/14—Protection against unauthorised use of memory or access to memory
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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
- G06F21/602—Providing cryptographic facilities or services
Abstract
The invention discloses a data destruction method of an SSD, which comprises the steps of firstly, integrally erasing data stored in a solid state storage module of the SSD when the SSD meets preset data destruction conditions, and erasing a logic program stored in a control module of the SSD after the data stored in the solid state storage module is completely erased. Therefore, the SSD data destruction is based on the original data destruction of the pure data layer, and the logic program destruction of the firmware layer is added to avoid data resumption, so that confidential data leakage is prevented, and SSD information security is improved. The invention also discloses a data destruction system and device of the SSD, which have the same beneficial effects as the data destruction method.
Description
Technical Field
The present invention relates to the field of data security, and in particular, to a method, a system, and an apparatus for destroying data in SSD.
Background
SSDs (Solid State Drives ) are widely used in the military field due to their high speed storage, shock resistance and high reliability. Since the SSD stores more confidential information, it is important to ensure the security of the data information stored by the SSD. Currently, many encryption techniques are available to encrypt data information stored in an SSD, but the encrypted data can still be decrypted in a certain manner, thereby causing leakage of confidential data. In the prior art, in order to prevent leakage of confidential data, the commonly adopted method for destroying SSD data is as follows: and rapidly erasing data information stored in the SSD by utilizing a file erasing function of the SSD so as to destroy confidential data. However, this data destruction method still has a risk of data recovery.
Therefore, how to provide a solution to the above technical problem is a problem that a person skilled in the art needs to solve at present.
Disclosure of Invention
The invention aims to provide a data destruction method, a system and a device for SSD, which are used for increasing the logical program destruction of a firmware layer on the basis of the original data destruction of a pure data layer so as to avoid data resumption, thereby preventing confidential data from being leaked and improving SSD information security.
In order to solve the technical problems, the invention provides a data destruction method of SSD, comprising:
when SSD meets preset data destruction conditions, integrally erasing data stored in a solid state storage module of the SSD;
detecting whether the data stored in the solid-state storage module is completely erased;
if not, returning to execute the step of overall erasing the data stored in the solid state storage module of the SSD;
if yes, erasing the logic program stored in the control module of the SSD.
Preferably, the process of integrally erasing data stored in the solid-state storage module of the SSD when the SSD meets a preset data destruction condition includes:
acquiring the light intensity of the environment where the SSD is positioned;
and when the light intensity is larger than a preset light threshold value, the data stored in the solid-state storage module of the SSD are erased integrally.
Preferably, the process of integrally erasing data stored in the solid-state storage module of the SSD when the SSD meets a preset data destruction condition includes:
and when a data destruction instruction is received, the data stored in the solid-state storage module of the SSD are integrally erased.
Preferably, the process of integrally erasing data stored in the solid-state storage module of the SSD when the SSD meets a preset data destruction condition includes:
detecting an external power supply state of the SSD;
and when the external power supply of the SSD is determined to be powered off according to the external power supply state, the data stored in the solid state storage module of the SSD are erased integrally.
Preferably, the process of integrally erasing data stored in the solid-state storage module of the SSD when the SSD meets a preset data destruction condition includes:
and starting timing when a timing destruction instruction containing timing time is received, and when the timing time reaches the timing time, integrally erasing data stored in the solid state storage module of the SSD.
Preferably, the process of integrally erasing data stored in the solid-state storage module of the SSD when the SSD meets a preset data destruction condition includes:
obtaining the distance between SSD and an external accessory;
and when the distance is greater than a preset distance threshold, the data stored in the solid-state storage module of the SSD are erased integrally.
Preferably, the process of integrally erasing data stored in the solid-state storage module of the SSD when the SSD meets a preset data destruction condition includes:
after receiving a decryption password for decrypting encrypted data stored in an SSD, detecting the correctness of the decryption password;
and when the error decryption password is continuously received for a plurality of times, the data stored in the solid-state storage module of the SSD are erased in a whole way.
Preferably, the data destruction method further includes:
when the SSD meets the preset physical destruction condition, the SSD is subjected to electric destruction or chemical destruction.
In order to solve the technical problem, the invention also provides a data destruction system of the SSD, which comprises:
the data erasing module is used for integrally erasing the data stored in the solid state storage module of the SSD when the SSD meets the preset data destruction condition;
the detection module is used for detecting whether the data stored in the solid-state storage module is completely erased or not; if not, executing the data erasing module again; if yes, executing a program erasing module;
the program erasing module is used for erasing the logic program stored in the control module of the SSD.
In order to solve the technical problem, the invention also provides a data destruction device of the SSD, which comprises:
a memory for storing a computer program;
and the processor is used for realizing the steps of any one of the SSD data destruction methods when the computer program is executed.
The invention provides a data destruction method of SSD, when SSD meets the preset data destruction condition, firstly, the data stored in a solid state storage module of SSD is erased integrally, and after the data stored in the solid state storage module is completely erased, a logic program stored in a control module of SSD is erased. Therefore, the SSD data destruction is based on the original data destruction of the pure data layer, and the logic program destruction of the firmware layer is added to avoid data resumption, so that confidential data leakage is prevented, and SSD information security is improved.
The invention also provides a data destruction system and device of the SSD, which have the same beneficial effects as the data destruction method.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the prior art and the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a flowchart of a data destruction method of an SSD according to an embodiment of the invention;
fig. 2 is a schematic structural diagram of a power isolation circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a data destruction system of an SSD according to an embodiment of the invention.
Detailed Description
The core of the invention is to provide a data destruction method, a system and a device for SSD, which are based on the original data destruction of a pure data layer, logic program destruction of a firmware layer is added to avoid data resumption, thereby preventing confidential data from being leaked and improving SSD information security.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a flowchart of a data destruction method for SSD according to an embodiment of the invention.
The data destruction method of the SSD comprises the following steps:
step S1: judging whether SSD meets preset data destruction conditions or not; if yes, step S2 is executed.
It should be noted that, the preset of the application is set in advance, and only needs to be set once, and no resetting is needed unless the modification is needed according to the actual situation.
In particular, considering that the SSD stores more confidential information, it is important to improve the security of data information stored by the SSD. In order to improve the safety of data information stored in the SSD, the data destruction conditions are set in advance, and the purpose is to perform data destruction operation on the SSD when the SSD meets the set data destruction conditions, so that confidential data leakage is prevented, and the safety of the SSD information is improved.
Based on the data destruction method, firstly, whether the SSD meets the set data destruction conditions is judged, and if the SSD meets the set data destruction conditions, the data destruction operation of the SSD is executed; if the SSD does not meet the set data destruction condition, the data destruction operation of the SSD is not executed.
Step S2: and integrally erasing the data stored in the solid-state storage module of the SSD.
In particular, SSDs are known that include a solid state storage module for storing data information and a control module for storing a logic program. In the data erasing operation of the SSD in the prior art, the data stored in the solid-state storage module is only erased in an integral way, but in the data destroying operation of the SSD in the application, the data erasing operation is only the first link of the data destroying operation, and in particular, the data erasing operation can be realized in an integral overwriting way, for example, the solid-state storage module is written into an integral form of '1' or '0'.
Step S3: detecting whether data stored in the solid-state storage module is completely erased; if not, returning to the execution step S2; if yes, go to step S4.
Specifically, in order to thoroughly erase available data stored in the solid-state storage module, after the data erasing operation of the SSD is executed, the method detects whether the data stored in the solid-state storage module is completely erased, and if the data stored in the solid-state storage module is not completely erased, which means that the data erasing operation of the SSD still needs to be executed, the data stored in the solid-state storage module of the SSD is entirely erased again until the data stored in the solid-state storage module is completely erased; if the data stored in the solid-state storage module is completely erased, the data erasure operation of the SSD is not required to be executed, and the next link of the data destruction operation is carried out.
Therefore, the method for repeatedly erasing the data stored in the solid-state storage module ensures that the available data stored in the solid-state storage module are thoroughly erased.
Step S4: and erasing the logic program stored in the control module of the SSD.
Specifically, considering that only performing the above data erasing operation may have a data recovery risk, the present application further performs a program destroying operation at the firmware level, that is, erases a logic program stored in a control module of the SSD, so as to avoid data resumption.
The invention provides a data destruction method of SSD, when SSD meets the preset data destruction condition, firstly, the data stored in a solid state storage module of SSD is erased integrally, and after the data stored in the solid state storage module is completely erased, a logic program stored in a control module of SSD is erased. Therefore, the SSD data destruction is based on the original data destruction of the pure data layer, and the logic program destruction of the firmware layer is added to avoid data resumption, so that confidential data leakage is prevented, and SSD information security is improved.
Based on the above embodiments:
as an optional embodiment, when the SSD meets a preset data destruction condition, a process of integrally erasing data stored in a solid state storage module of the SSD includes:
acquiring the light intensity of the environment where the SSD is positioned;
and when the light intensity is greater than a preset light threshold value, the data stored in the solid-state storage module of the SSD are erased integrally.
Specifically, the data destruction conditions set in the application comprise visible light data destruction, namely, a light threshold is set in advance, and the setting principle is as follows: if the light intensity of the environment where the SSD is located is larger than the set light threshold value, the SSD is considered to be forcibly disassembled, and then data destruction operation is executed; if the light intensity of the environment where the SSD is located is not greater than the set light threshold, the SSD is considered not to be forcibly disassembled, and then the data destruction operation is not executed.
Based on this, the present application may obtain the light intensity of the environment where the SSD is located through the light detecting element, then compare the obtained light intensity with the preset light threshold, and execute the data destruction operation when the obtained light intensity is greater than the preset light threshold.
As an optional embodiment, when the SSD meets a preset data destruction condition, a process of integrally erasing data stored in a solid state storage module of the SSD includes:
and when a data destruction instruction is received, the data stored in the solid-state storage module of the SSD are integrally erased.
Specifically, the data destruction conditions set in the application include instruction data destruction, namely when a data destruction instruction is received, executing data destruction operation. For example, the data destruction operation is triggered by the operation key, specifically, when the operation key is detected to be pressed (equivalent to receiving the data destruction instruction), the data destruction operation is executed; for another example, the data destruction operation is remotely triggered by the upper computer, specifically, remote communication connection is established with the upper computer, and when a data destruction instruction issued by the upper computer is received, the data destruction operation is executed.
As an optional embodiment, when the SSD meets a preset data destruction condition, a process of integrally erasing data stored in a solid state storage module of the SSD includes:
detecting an external power supply state of the SSD;
and when the external power supply of the SSD is powered off according to the external power supply state, the data stored in the solid state storage module of the SSD are erased integrally.
Specifically, the data destruction conditions set in the application include offline data destruction, that is, when external power supply of the SSD is powered off, performing data destruction operation, specifically detecting an external power supply state of the SSD, and when external power supply of the SSD is powered off according to the external power supply state of the SSD, performing data destruction operation.
As an optional embodiment, when the SSD meets a preset data destruction condition, a process of integrally erasing data stored in a solid state storage module of the SSD includes:
and starting timing when a timing destroying instruction containing timing time is received, and when the timing time reaches the timing time, integrally erasing data stored in the solid-state storage module of the SSD.
Specifically, the data destruction conditions set in the application include timing data destruction, that is, when the set timing time is reached, performing data destruction operation, specifically, after receiving a timing destruction instruction containing the timing time, extracting the timing time in the timing destruction instruction, starting timing when the timing destruction instruction is received, and when the timing time reaches the timing time, performing data destruction operation.
As an optional embodiment, when the SSD meets a preset data destruction condition, a process of integrally erasing data stored in a solid state storage module of the SSD includes:
obtaining the distance between SSD and an external accessory;
and when the distance is greater than a preset distance threshold value, the data stored in the solid-state storage module of the SSD are erased in a whole.
Specifically, the data destruction conditions set in the application include accessory distance data destruction, namely, a distance detection element for detecting the distance between the accessory and an external accessory is arranged on the SSD, the distance between the SSD and the external accessory is acquired through the distance detection element, and when the acquired distance is greater than a preset distance threshold, data destruction operation is executed.
As an optional embodiment, when the SSD meets a preset data destruction condition, a process of integrally erasing data stored in a solid state storage module of the SSD includes:
after receiving a decryption password for decrypting encrypted data stored in the SSD, detecting the correctness of the decryption password;
and when the error decryption password is continuously received for a plurality of times, the data stored in the solid-state storage module of the SSD are erased in a whole way.
Specifically, the data destruction conditions set in the application include password error data destruction, namely after the continuous error times of the decryption password for decrypting the encrypted data stored in the SSD reach a certain number, executing data destruction operation, specifically, after receiving the decryption password, detecting whether the decryption password is correct or not, if not, accumulating the input error times of the decryption password; if the input error times are correct, resetting the accumulated input error times; and when the accumulated input error times reach a preset time threshold, executing data destruction operation.
As an optional embodiment, the data destruction method further includes:
when the SSD meets the preset physical destruction conditions, the SSD is subjected to electric destruction or chemical destruction.
Furthermore, the physical hardware of the SSD can be thoroughly destroyed by considering that the physical destruction is an ultimate destruction mode, and the data cannot be repaired absolutely, so that the SSD is suitable for occasions with extremely high data security requirements.
The known physical destruction is divided into two types, namely electric destruction and chemical destruction, so that when SSD meets the preset physical destruction condition, the SSD is subjected to electric destruction or chemical destruction. Specifically, the electrical destruction mode: the flash memory chip in the SSD is burnt out in a high-voltage and high-current mode, so that data destruction is realized; chemical destruction mode: the method comprises the steps of storing strong acid liquid into a medium of an SSD in advance, when a physical destroying function is triggered, enabling the surface of the medium storing the strong acid liquid to be damaged, enabling the strong acid liquid to flow into the surface of a flash memory chip in the SSD, and after a period of corrosion, corroding the strong acid liquid into the chip to destroy the internal structure of the chip, so that data destruction is achieved.
More specifically, the electrical destruction method is further described: the physical destroying power source used in the electric destroying process is set in advance, for example, a 12V power source on a SATA (Serial Advanced Technology Attachment, serial connection) interface of the SSD is not used, and the power source can be used as the physical destroying power source. It should be noted that, the physical destruction power supply and the internal power supply +5v of the SSD need to be separated, and when the SSD does not execute the electric destruction operation, the internal power supply of the SSD acts, and the physical destruction power supply does not act; when the SSD performs an electrical destruction operation, the physical destruction power supply functions.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a power isolation circuit according to an embodiment of the invention. The power isolation circuit comprises a driving device G, NMOS pipe Q1 and a resistor R, PMOS double pipe Q2 (model Si4925 DD), and the working principle is as follows: the driving device G outputs a high level to the NMOS transistor Q1 when receiving the electrical destruction signal (g_zong), and outputs a low level to the NMOS transistor Q1 when not receiving the electrical destruction signal. The NMOS transistor Q1 is turned on when receiving a high level and turned off when receiving a low level. When the NMOS tube is conducted, the PMOS double-tube Q2 is conducted at a low level; when the NMOS tube is turned off, the PMOS dual-tube Q2 input high level is turned off. When the PMOS double-transistor Q2 is turned on, a physical destruction power (+12in) can be injected into the flash memory chip to burn it.
In addition, the problem of power consumption needs to be paid attention to when the electric destruction function of the SSD is designed, and because the electric destruction thought of high voltage and high current is adopted, the instant short circuit condition is likely to be generated, and the power supply of the whole system is likely to be influenced, so that the method can adopt a strategy of grouping destruction, namely not burning all flash memory particles on the SSD at the same time, but grouping the flash memory particles, and at the moment, secondary power isolation for realizing grouping destruction of the flash memory particles on the SSD is also required to be added, and it is understood that the number of the secondary power isolation circuits is determined according to grouping of the flash memory particles on the SSD.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a data destruction system of an SSD according to an embodiment of the invention.
The data destruction system of the SSD comprises:
the data erasing module 1 is used for integrally erasing the data stored in the solid state storage module of the SSD when the SSD meets the preset data destruction condition;
a detection module 2 for detecting whether the data stored in the solid-state storage module is completely erased; if not, executing the data erasing module again; if yes, executing a program erasing module;
and the program erasing module 3 is used for erasing the logic program stored in the control module of the SSD.
The description of the data destruction system provided in the present application refers to the embodiment of the data destruction method, and is not repeated herein.
The application also provides a data destruction device of SSD, comprising:
a memory for storing a computer program;
and the processor is used for realizing the steps of any one of the SSD data destruction methods when executing the computer program.
The description of the data destruction device provided in the present application refers to the embodiment of the data destruction method, and is not repeated herein.
It should also be noted that in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The data destruction method of the SSD is characterized by comprising the following steps of:
when SSD meets preset data destruction conditions, integrally erasing data stored in a solid state storage module of the SSD in an integral duplicating mode; the preset data destruction conditions comprise visible light data destruction, instruction data destruction, offline data destruction, timing data destruction, accessory distance data destruction and password error data destruction;
detecting whether the data stored in the solid-state storage module is completely erased;
if not, returning to execute the step of integrally erasing the data stored in the solid-state storage module of the SSD in an integral duplicating mode;
if yes, erasing a logic program stored in a control module of the SSD;
the data destruction method further comprises the following steps:
when the SSD meets the preset physical destruction conditions, carrying out grouping type electric destruction or chemical destruction on the SSD;
when the SSD meets a preset data destruction condition, a process of integrally erasing data stored in a solid state storage module of the SSD includes:
when a data destruction instruction is received, the data stored in the solid-state storage module of the SSD are integrally erased; when the operation key is detected to be pressed or a data destruction instruction issued by an upper computer with established remote communication connection is received, the corresponding data destruction instruction is determined to be received;
when the SSD meets a preset data destruction condition, a process of integrally erasing data stored in a solid state storage module of the SSD includes:
after receiving a decryption password for decrypting encrypted data stored in an SSD, detecting the correctness of the decryption password;
and when the error decryption password is continuously received for a plurality of times, the data stored in the solid-state storage module of the SSD are erased in a whole way.
2. The data destruction method of an SSD of claim 1, wherein the process of integrally erasing data stored in the solid state storage module of the SSD when the SSD is satisfied with a preset data destruction condition comprises:
acquiring the light intensity of the environment where the SSD is positioned;
and when the light intensity is larger than a preset light threshold value, the data stored in the solid-state storage module of the SSD are erased integrally.
3. The data destruction method of an SSD of claim 1, wherein the process of integrally erasing data stored in the solid state storage module of the SSD when the SSD is satisfied with a preset data destruction condition comprises:
detecting an external power supply state of the SSD;
and when the external power supply of the SSD is determined to be powered off according to the external power supply state, the data stored in the solid state storage module of the SSD are erased integrally.
4. The data destruction method of an SSD of claim 1, wherein the process of integrally erasing data stored in the solid state storage module of the SSD when the SSD is satisfied with a preset data destruction condition comprises:
and starting timing when a timing destruction instruction containing timing time is received, and when the timing time reaches the timing time, integrally erasing data stored in the solid state storage module of the SSD.
5. The data destruction method of an SSD of claim 1, wherein the process of integrally erasing data stored in the solid state storage module of the SSD when the SSD is satisfied with a preset data destruction condition comprises:
obtaining the distance between SSD and an external accessory;
and when the distance is greater than a preset distance threshold, the data stored in the solid-state storage module of the SSD are erased integrally.
6. A data destruction system of an SSD, comprising:
the data erasing module is used for integrally erasing the data stored in the solid-state storage module of the SSD in an integral overwriting mode when the SSD meets preset data destruction conditions; the preset data destruction conditions comprise visible light data destruction, instruction data destruction, offline data destruction, timing data destruction, accessory distance data destruction and password error data destruction;
the detection module is used for detecting whether the data stored in the solid-state storage module is completely erased or not; if not, executing the data erasing module again; if yes, executing a program erasing module;
the program erasing module is used for erasing the logic program stored in the control module of the SSD;
the data destruction system specifically may further include: when the SSD meets the preset physical destruction conditions, carrying out grouping type electric destruction or chemical destruction on the SSD;
the data destruction system is specifically used for integrally erasing data stored in the solid state storage module of the SSD when a data destruction instruction is received; when the operation key is detected to be pressed or a data destruction instruction issued by an upper computer with established remote communication connection is received, the corresponding data destruction instruction is determined to be received;
the data destruction system is specifically used for detecting the correctness of a decryption password after receiving the decryption password for decrypting encrypted data stored in the SSD; and when the error decryption password is continuously received for a plurality of times, the data stored in the solid-state storage module of the SSD are erased in a whole way.
7. A data destruction apparatus of an SSD, comprising:
a memory for storing a computer program;
a processor for implementing the steps of the data destruction method of an SSD as claimed in any one of claims 1-5 when executing the computer program.
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