CN112349340B - Method for constructing waste equipment overwriting scheme library based on cyclic test - Google Patents
Method for constructing waste equipment overwriting scheme library based on cyclic test Download PDFInfo
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- CN112349340B CN112349340B CN202011235032.1A CN202011235032A CN112349340B CN 112349340 B CN112349340 B CN 112349340B CN 202011235032 A CN202011235032 A CN 202011235032A CN 112349340 B CN112349340 B CN 112349340B
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
- G11C29/04—Detection or location of defective memory elements, e.g. cell constructio details, timing of test signals
- G11C29/08—Functional testing, e.g. testing during refresh, power-on self testing [POST] or distributed testing
- G11C29/12—Built-in arrangements for testing, e.g. built-in self testing [BIST] or interconnection details
- G11C29/36—Data generation devices, e.g. data inverters
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C29/00—Checking stores for correct operation ; Subsequent repair; Testing stores during standby or offline operation
- G11C29/04—Detection or location of defective memory elements, e.g. cell constructio details, timing of test signals
- G11C29/08—Functional testing, e.g. testing during refresh, power-on self testing [POST] or distributed testing
- G11C29/12—Built-in arrangements for testing, e.g. built-in self testing [BIST] or interconnection details
- G11C29/38—Response verification devices
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Abstract
The application discloses a method for constructing an overwriting scheme library of waste equipment based on a cyclic test. The purpose of continuously expanding the scheme library is achieved by analyzing and circularly testing the unknown equipment model in the overwriting scheme library.
Description
Technical Field
The application belongs to the technical field of electronic equipment, and particularly relates to a method for constructing a waste equipment overwriting scheme library based on cyclic test.
Background
In recent years, the update speed of electronic devices has exceeded the rejection rate, and the replaced waste electronic devices are either idle or sold. Statistics show that most people choose to use vending means to process waste equipment in the hands.
Currently, due to lack of relevant legal regulations, the disposal mode of waste equipment in the second-hand recycling industry is limited to clean appearance and equipment data reduction. The private file data stored in the equipment cannot be deleted directly, and serious threat is caused to personal privacy of users and even national security. In order to ensure that resource waste is avoided and personal information safety of users is ensured, thorough removal of personal privacy data of the users becomes an open problem to be solved. Therefore, the application provides a method for constructing a waste equipment overwriting scheme library based on a cyclic test, which selects a proper scheme for overwriting and cleaning according to equipment characteristic data of equipment to be cleaned, and evaluates the advantages and disadvantages of the overwriting scheme until the overwriting scheme meeting the overwriting requirement is found.
Disclosure of Invention
The application provides a method for constructing a waste equipment overwriting scheme library based on a cyclic test. The method comprises the steps of analyzing and circularly testing unknown equipment models in an overwriting scheme library to achieve the purpose of continuously expanding the scheme library, wherein the method comprises an information extraction module, an overwriting scheme execution module, an overwriting scheme effect evaluation module, an overwriting test module and the overwriting scheme library.
Firstly, the information extraction module is used for extracting the storage space and the image file data before the overwriting of the equipment to be cleared, and the storage space and the image file data are used for analyzing and comparing the difference of the data before and after the overwriting in the effect evaluation module of the overwriting scheme, so that the final effect of the overwriting scheme is evaluated.
Then, based on the scheme matching mode, the overwriting scheme provided by the overwriting scheme library is utilized to carry out overwriting and clearing operation on the equipment to be cleared. If the overwriting scheme executing module matches the similar cases in the overwriting scheme library according to the characteristic data of the equipment to be cleared, executing the scheme corresponding to the cases to clear the equipment to be cleared, and further obtaining the equipment with the over-written. If the similar cases cannot be matched in the overwriting scheme database, and the matched overwriting scheme cannot be given, defining the device as the identified device to be cleared, which fails to be matched.
Then, the overwriting scheme is evaluated by an overwriting scheme evaluation module aiming at the overwriting completion equipment and combining the storage space before overwriting and the image file data obtained in the information extraction module. If the standard reaches the preset overwriting standard, the cleared equipment is obtained; if the overwrite standard is not met, defining the device as an overwrite disqualified device.
And then, aiming at the equipment to be cleaned and the equipment with unqualified overwriting, which are identified and fail to be matched, carrying out an overwriting scheme circulation experiment under the conditions of different overwriting sequences and the number of times of overwriting by using an overwriting test module, and carrying out real-time evaluation by using an overwriting scheme effect evaluation module until an overwriting scheme which can reach the set standard is found.
And finally, storing the test cases and schemes which reach the standard in the overwriting evaluation into an overwriting scheme library.
Drawings
FIG. 1 is a diagram of a design structure of an overwriting scheme of waste equipment;
FIG. 2 is a flow chart of an information extraction module;
FIG. 3 is a flow chart of an override scheme execution module;
FIG. 4 is a flow chart of an override scheme effect evaluation module;
FIG. 5 overwrites a test module flow diagram;
fig. 6 overwrites the schema library.
Detailed Description
The application provides a method for constructing an overwriting scheme library of waste equipment based on a cyclic test, which comprises an information extraction module, an overwriting scheme execution module, an overwriting scheme effect evaluation module, an overwriting test module and an overwriting scheme library, wherein the specific structure of the method is shown in figure 1.
(1) Information extraction module
The input of the module is equipment to be cleared, the output is the storage space before overwriting and the image file data, the function is to obtain the image data content of the equipment before overwriting, and the comparison and evaluation of the selected overwriting scheme effect are conveniently carried out in the overwriting scheme effect evaluation module.
(2) Overwrite scheme execution module
The input of the module is equipment to be cleared and an overwriting scheme, the output is equipment to be cleared after overwriting and the identified equipment to be cleared which fails to match, and the main function of the module is to identify the equipment to be cleared and match with a scheme sample in an overwriting scheme library so as to determine the overwriting scheme and execute the overwriting scheme.
(3) Override scheme effect evaluation module
The input of the module is storage space before overwriting and image file data, overwriting finishing equipment and overwriting testing finishing equipment, and the output is feedback information of standard effect evaluation of abandoned equipment, cleared equipment, overwriting evaluation disqualification equipment and overwriting scheme.
(4) Overwriting test module
The input of the module is the feedback information of the identified equipment to be cleared, the overwrite evaluation disqualified equipment and the overwrite scheme effect evaluation standard, the output is the test scheme of the overwrite test completion equipment and the overwrite evaluation standard, and the main function of the module is to find a new overwrite scheme suitable for the unknown equipment evaluation standard aiming at the identified equipment to be cleared or the overwrite disqualified equipment which are failed to be matched through the overwrite scheme circulation experiments under different overwrite sequences and the overwrite times.
(5) Over-writing scheme library
The input of the module is the test scheme for evaluating the standard and the feedback information for evaluating the effect of the overwriting scheme, and the output is the overwriting scheme, and the main function of the module is to store a large number of successful overwriting cases based on the characteristic data of the equipment to be cleared and the corresponding overwriting scheme, and simultaneously collect the feedback information for evaluating the effect of the overwriting scheme execution for the unknown equipment, and confirm the effective test cases and the new overwriting scheme after evaluating the effect of the overwriting scheme.
Information extraction module
The input of the module is equipment to be cleared, and the output is storage space before overwriting and mirror image file data. The evaluation criteria of the overwriting scheme is whether the device has the information required to be overwritten after overwriting, so that comparison can be generated after overwriting, and the storage space and the image file data before overwriting of the device to be cleared can be obtained in advance. The specific process is shown in fig. 2.
Firstly, the equipment information analysis module is utilized to obtain the storage space information of the equipment to be cleaned, and a space for storing the part of data is opened up in advance at a computer end.
And then, extracting the storage space and the mirror image file data of the equipment to be cleaned after the analysis by a mirror image data extraction module in a file mode.
Overwrite scheme execution module
The input of the module is equipment to be cleaned and an overwriting scheme, and the output is equipment to be cleaned after overwriting and the identified equipment to be cleaned which fails to match. The specific process is shown in fig. 3, and the specific flow is as follows:
firstly, extracting equipment characteristic data of equipment to be cleaned by using an equipment characteristic extraction module and identifying the equipment characteristic data.
And then, performing similarity matching on the identified equipment to be cleaned and the overwriting schemes provided by the overwriting scheme library through an overwriting scheme matching module, and selecting a scheme with the similarity reaching more than 90% as the overwriting scheme. If the scheme meeting the similarity requirement does not exist at the moment, defining the equipment as the equipment to be cleaned which is identified and fails to be matched, and waiting for the overwriting test module to carry out the overwriting scheme selection test.
And finally, selecting a corresponding overwriting scheme in the overwriting scheme library by using the device meeting the similarity requirement before by using the overwriting scheme loading module to carry out overwriting clearing, thereby obtaining the overwriting completed device.
Override scheme effect evaluation module
The input of the module is the storage space before overwriting and the image file data, the overwriting equipment and the overwriting test equipment, and the output is the feedback information of the cleared equipment, the overwriting evaluation disqualification equipment and the overwriting scheme effect evaluation standard. And by continuously comparing the differences in the storage space before and after overwriting and the image file data, the advantages and disadvantages of the overwriting scheme are evaluated, and the overwriting scheme meeting the overwriting requirements is determined and stored in the overwriting scheme library, so that the purpose of continuously expanding and updating the overwriting scheme library is achieved. The specific process is shown in fig. 4.
Firstly, the data emptying module is used for emptying all contents of the equipment after overwriting or the equipment after overwriting and testing, and writing the original pure data packet, so that the overwritten data and the data stored in advance cannot be browsed on the equipment.
Then, in order to evaluate the merits of the selected overwrite scheme, the data content in the blank device needs to be recovered by the data recovery module. The criteria for the evaluation of the overwrite scheme in the present application are: after overwriting, purging, and resuming, no previous data is stored in the purged device.
And then, comparing the difference between the storage space before overwriting and the image file data and the storage space after recovering and the image file data by an image file differentiation comparison module.
And finally, evaluating the effect of the overwriting scheme according to the overwriting evaluation module by combining the differentiation result, and outputting the cleaned equipment or the overwriting evaluation unqualified equipment according to the evaluation result. If the number of times of recording exceeds the upper limit of 90 times in the overwrite evaluation module, defining the equipment as waste equipment, and failing to design an overwrite scheme.
The overwrite scheme, which requires standard, is over-written, wherein the recoverable files can only account for 10% of the storage space and image file packets, and wherein there can only be similar identifiable unopened files and unidentifiable files. And aiming at the equipment which is over-written or over-written tested and meets the over-written requirement, transmitting feedback information of which the effect evaluation of the over-written scheme meets the standard to a corresponding module so as to expand and update the over-written scheme library.
Overwriting test module
The module inputs feedback information of the identified equipment to be cleaned, the equipment with unqualified overwrite evaluation and the equipment with qualified overwrite scheme effect evaluation, which are failed in matching, and outputs test cases of the equipment with qualified overwrite evaluation. The purpose of the overwriting test module is to select a proper overwriting scheme to carry out overwriting clearing on the equipment, thereby determining the overwriting scheme of the equipment to be cleared or the equipment with the unqualified overwriting, which is failed to be matched, and storing the case into an overwriting scheme library. The overwriting case comprises equipment information and an overwriting scheme, wherein the overwriting scheme comprises an overwriting sequence and the number of times of overwriting, the overwriting sequence comprises an all 0 sequence, an all 1 sequence, a random sequence, a 0/1 cross sequence, a 0/random cross sequence, a 1/random cross sequence, a 0/1/random cross sequence and the like, the upper limit of the number of times of overwriting is required to be ten, and the number of times of overwriting is increased for each test experiment to carry out the overwriting of the corresponding sequence. The specific process is shown in fig. 5. The specific flow is as follows:
first, the device with disqualification for overwriting evaluation is reset and restored to an initial state by a device reset module, so that overwriting operation can be conveniently performed.
And selecting an overwriting sequence for the reset device or the identified clearing device with failed matching, selecting from the all 0 sequences to perform a test experiment, and storing the adopted overwriting sequence into an overwriting test scheme recording module.
Then, the number of times of the overwriting sequence is selected, and the number of times of the overwriting is also saved in an overwriting test scheme recording module, wherein the upper limit of the number of times of the overwriting is defined as ten times, and if the number of times of the overwriting is more than ten times and the overwriting requirements are not met yet, other overwriting sequences are selected in the next overwriting test experiment to redesign the overwriting scheme.
And finally, performing the overwriting test on the selected overwriting sequence and the overwriting times of the equipment by using the overwriting module. If the equipment subjected to the overwriting test is evaluated to reach the standard by the overwriting scheme effect evaluation module, feedback information of the overwriting scheme effect evaluation to reach the standard is received in the overwriting test scheme recording module, so that the test case which is evaluated to reach the standard by the overwriting at this time is updated to the overwriting scheme library.
Over-writing scheme library
The input of the module is the test case with the up-to-standard overwrite evaluation and the feedback information with the up-to-standard overwrite scheme effect evaluation, the output is the overwrite scheme, and the function is to store a large number of overwrite cases and to timely expand and update according to the overwrite test module. The specific process is shown in fig. 6. The specific flow is as follows:
firstly, providing an overwriting case for an overwriting scheme executing module through an overwriting case library, and then carrying out similarity matching with the identified equipment to be cleared.
And then, aiming at the equipment with the similarity matching meeting requirements, selecting a corresponding overwriting scheme in the overwriting scheme library according to the overwriting case library to serve the overwriting scheme executing module.
And then, evaluating the up-to-standard feedback information according to the effect of the overwriting scheme transmitted by the effect evaluation module of the overwriting scheme, judging whether the selected scheme is suitable for the overwriting cleaning of the experimental equipment, and if the up-to-standard signal is received, updating the characteristic information of the equipment to an overwriting case library to serve as a new case for storage.
And finally, storing the test cases which reach the standard in the overwriting evaluation and are transmitted by the overwriting test module into an overwriting case library.
The innovation of the application is that
1) The method can automatically match with cases in the overwriting scheme library, so that a proper overwriting scheme is selected for overwriting;
2) The method and the device can select a proper overwriting scheme from the cases which are not stored in the overwriting scheme library through the overwriting test module, and store the proper overwriting scheme into the overwriting scheme library in time.
Claims (2)
1. The method for building the waste equipment overwriting scheme library based on the cyclic test is characterized by comprising the following steps of:
firstly, extracting and obtaining storage space and image file data before overwriting of equipment to be cleared by utilizing an information extraction module, wherein the storage space and the image file data are used for analyzing and comparing the difference of the data before and after overwriting in an overwriting scheme effect evaluation module, and evaluating the final effect of the overwriting scheme;
then, based on a scheme matching mode, performing overwriting clearing operation on the equipment to be cleared by using an overwriting scheme provided by an overwriting scheme library; if the overwriting scheme executing module matches similar cases in the overwriting scheme library according to the characteristic data of the equipment to be cleared, executing the scheme corresponding to the cases to clear the equipment to be cleared, and further obtaining the equipment with the over-written; if the similar cases cannot be matched in the overwriting scheme library and the matched overwriting scheme cannot be given, defining the equipment as the equipment to be cleaned, which is identified and fails to be matched;
then, aiming at the overwriting completion equipment, an overwriting scheme is evaluated through an overwriting scheme effect evaluation module by combining the storage space before overwriting and the image file data obtained in the information extraction module; if the standard reaches the preset overwriting standard, the cleared equipment is obtained; if the overwriting standard is not met, defining the equipment as overwriting evaluation disqualification equipment;
then, aiming at the equipment to be cleaned and the equipment with failed matching and unqualified overwriting evaluation, carrying out an overwriting scheme circulation experiment under the conditions of different overwriting sequences and the number of times by using an overwriting test module, and carrying out real-time evaluation by using an overwriting scheme effect evaluation module until an overwriting scheme which can reach a set standard is found;
finally, the test cases and schemes which reach the standard in the overwriting evaluation are stored in an overwriting scheme library;
the overwrite scheme effect evaluation module comprises: the system comprises a data emptying module, a data recovery module, a mirror image file differentiation comparison module and an overwriting evaluation module;
the specific process of the overwriting scheme effect evaluation module is as follows:
firstly, using a data emptying module to empty all contents of the equipment after overwriting or the equipment after overwriting and testing, and writing original pure data packets, so as to ensure that the overwritten data and the data stored in advance cannot be browsed on the equipment;
then, to evaluate the merits of the selected overwrite scheme, the data content in the blank device is recovered by the data recovery module, and the criteria of the overwrite scheme evaluation are: after overwriting, clearing and recovering, the cleared equipment does not store the previous data;
then, comparing the difference between the storage space before overwriting and the image file data and the difference between the storage space after recovering and the image file data by an image file differentiation comparison module;
finally, the effect of the overwriting scheme is estimated according to the overwriting estimation module by combining the differentiation result, and the cleared equipment or the overwriting estimation disqualified equipment is output according to the estimation result; if the number of times of recording in the overwriting evaluation module exceeds the upper limit of 90 times, defining the equipment as waste equipment, and failing to design an overwriting scheme;
the overwriting scheme requiring standard reaching only 10% of the memory space and the image file data package can be occupied by the recoverable file, and the similar identifiable unopened file and unidentifiable file can be only existed; and aiming at the equipment which is over-written or over-written tested and meets the over-written requirement, transmitting feedback information of which the effect evaluation of the over-written scheme meets the standard to a corresponding module so as to expand and update the over-written scheme library.
2. The method for building the waste equipment overwriting scheme library based on the cyclic test according to claim 1, wherein said overwriting test module comprises: the device comprises a device resetting module, an overwriting sequence control module, an overwriting times control module, an overwriting module and an overwriting test scheme recording module;
the specific process of the overwriting test module is as follows:
firstly, resetting unqualified equipment for overwriting evaluation through an equipment resetting module and recovering the unqualified equipment to an initial state;
then, selecting an overwriting sequence for the reset equipment or the identified clearing equipment with failed matching, selecting from the all 0 sequences to perform a test experiment, and storing the adopted overwriting sequence into an overwriting test scheme recording module;
then, the overwriting times of the overwriting sequence are selected and are also saved in an overwriting test scheme recording module, the upper limit of the overwriting times is defined to be ten times, and if the upper limit of the overwriting times exceeds ten times and the overwriting requirements are not met yet, other overwriting sequences are selected in the next overwriting test experiment to redesign the overwriting scheme;
finally, the overwriting module is utilized to carry out the overwriting test on the selected overwriting sequence and the overwriting times of the equipment; if the equipment subjected to the overwriting test is evaluated to reach the standard by the overwriting scheme effect evaluation module, feedback information of the overwriting scheme effect evaluation to reach the standard is received in the overwriting test scheme recording module, so that the test case which is evaluated to reach the standard by the overwriting at this time is updated to the overwriting scheme library.
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| CN113037544B (en) * | 2021-02-25 | 2023-03-24 | 北京工业大学 | Method for configuring standard data packet in clearing experiment based on user simulation model |
| CN113032851A (en) * | 2021-02-25 | 2021-06-25 | 北京工业大学 | Android intelligent device storage space purification processing method based on recursive circulation |
| CN113032180B (en) * | 2021-02-25 | 2024-03-22 | 北京工业大学 | Design method for waste mobile phone cleaning experiment |
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