CN112349340A - Waste equipment overwriting scheme library building method based on cycle test - Google Patents
Waste equipment overwriting scheme library building method based on cycle test Download PDFInfo
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- CN112349340A CN112349340A CN202011235032.1A CN202011235032A CN112349340A CN 112349340 A CN112349340 A CN 112349340A CN 202011235032 A CN202011235032 A CN 202011235032A CN 112349340 A CN112349340 A CN 112349340A
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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 invention discloses a waste equipment overwriting scheme library construction method based on cycle testing, which comprises an information extraction module, an overwriting scheme execution module, an overwriting scheme effect evaluation module, an overwriting testing module and an overwriting scheme library. By analyzing and circularly testing unknown equipment models in the overwriting scheme library, the aim of continuously expanding the scheme library is fulfilled.
Description
Technical Field
The invention belongs to the technical field of electronic equipment, and particularly relates to a waste equipment overwriting scheme library building method based on cycle testing.
Background
In recent years, the replacement speed of electronic devices has exceeded the frequency of scrapping, and the replaced electronic devices are either left unused or sold. According to the statistical data, most people choose to treat the waste equipment in the hands by adopting a vending method.
At present, the treatment mode of the used equipment in the second-hand recovery industry is limited to appearance cleaning and equipment data reduction due to the lack of relevant laws and regulations. The privacy file data stored in the device can not be directly deleted, and serious threats are caused to the personal privacy of the user and even the national security. In order to avoid resource waste and ensure personal information security of a user, thorough removal of personal private data of the user becomes an open problem to be solved. Therefore, the method for constructing the overwriting scheme library of the waste equipment based on the cycle test is provided, the appropriate scheme is selected for overwriting and clearing according to the equipment characteristic data of the equipment to be cleared, and the quality of the overwriting scheme is evaluated until the overwriting scheme meeting the overwriting requirement is found.
Disclosure of Invention
The application provides a waste equipment overwriting scheme library building method based on cycle testing. The method achieves the purpose of continuously expanding the scheme library by analyzing and circularly testing unknown equipment models in the overwriting scheme library, and 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.
Firstly, the information extraction module is used for extracting and obtaining the storage space before overwriting and the image file data of the equipment to be cleared, and the storage space before overwriting and the image file data are used for analyzing and comparing the difference of the data before overwriting and after overwriting in the overwriting scheme effect evaluation module, 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 device to be cleared. And if the similar cases in the overwriting scheme library are matched by the overwriting scheme execution module according to the characteristic data of the equipment to be cleared, executing the scheme corresponding to the case to overwrite and clear the equipment to be cleared, and further obtaining the equipment with the overwritten function. And if the similar cases cannot be matched in the overwriting scheme database and the matched overwriting scheme cannot be given, defining the equipment as the identified equipment to be cleaned with the failed matching.
And then, evaluating the overwriting scheme by combining the storage space before overwriting and the image file data obtained in the information extraction module through an overwriting scheme evaluation module aiming at the overwritten equipment. If the established overwrite standard is reached, obtaining the cleared equipment; if the overwrite standard is not met, the equipment is defined as the unqualified overwrite equipment.
Then, for the identified equipment to be cleaned and the equipment with unqualified overwriting, which fail to match, an overwriting test module is utilized to perform overwriting scheme circulation experiments under different overwriting sequences and overwriting times, and an overwriting scheme effect evaluation module is utilized to perform real-time evaluation until an overwriting scheme which can reach the established standard is found.
And finally, storing the test cases and the schemes meeting the overwriting evaluation standards into an overwriting scheme library.
Drawings
FIG. 1 is a structural diagram of the overwriting scheme of the waste equipment;
FIG. 2 is a flow diagram of an information extraction module;
FIG. 3 depicts a flow diagram of an overwrite scheme execution module;
FIG. 4 is an overwrite scheme effectiveness evaluation module flow diagram;
FIG. 5 overwrites the test block flow diagram;
FIG. 6 overwrites the scheme library.
Detailed Description
The waste equipment overwriting scheme library construction method based on the cycle test 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, and the specific structure is shown in fig. 1.
(1) Information extraction module
The module has the input of the equipment to be cleared, the output of the module is storage space before overwriting and image file data, and the function of the module is to obtain the image data content of the equipment before overwriting, so that the comparison and evaluation of the selected overwriting scheme effect in the overwriting scheme effect evaluation module are facilitated.
(2) Overwrite scheme execution module
The module has the input of a device to be cleared and an overwriting scheme, and the output of the module is an overwriting completed device and an identified device to be cleared which fails to match.
(3) Overwrite scheme effect evaluation module
The module has the input of storage space before overwriting and image file data, overwriting equipment and overwriting test equipment, and the output of the module is feedback information of waste equipment, cleared equipment, overwriting evaluation unqualified equipment and overwriting scheme effect evaluation standard, and has the main functions of evaluating the overwriting scheme effect and finally determining the effective overwriting scheme for the test equipment.
(4) Overwrite test module
The module has the main functions of finding a new overwriting scheme suitable for the unknown equipment to evaluate and reach the standard through different overwriting sequences and overwriting scheme cyclic experiments under the condition of overwriting times aiming at the identified equipment to be cleaned which fails to be matched or the equipment which fails to be overwritten.
(5) Overwriting scheme library
The module inputs a test scheme for achieving the overwriting evaluation and feedback information for achieving the overwriting scheme effect evaluation, and outputs the overwriting scheme, wherein the main function of the module is to store a large number of overwriting success cases based on the characteristic data of the equipment to be cleared and corresponding overwriting schemes thereof, and simultaneously collect overwriting scheme execution effect evaluation feedback information aiming at unknown equipment and confirm effective test cases and new overwriting schemes after the overwriting scheme effect evaluation.
Information extraction module
The input of the module is the equipment to be cleared, and the output is the storage space before overwriting and the mirror image file data. The evaluation criterion of the overwriting scheme is whether the equipment has information required to be overwritten before after overwriting, and the storage space and the image file data before overwriting of the equipment to be cleared can be obtained in advance in order to generate comparison after overwriting. The specific process is shown in fig. 2.
Firstly, the storage space information of the equipment to be cleared is obtained by utilizing an equipment information analysis module, and a space for storing the part of data is opened up in advance at a computer end.
And then, extracting the analyzed storage space of the equipment to be cleared and the image file data in a file mode through an image data extraction module.
Overwrite scheme execution module
The module has inputs of a device to be cleared and an overwrite scheme, and outputs of a device having completed an overwrite and an identified device to be cleared that failed to match. The specific process is shown in fig. 3, and the specific flow is as follows:
firstly, extracting and identifying the device characteristic data of the device to be cleaned by using a device characteristic extraction module.
Then, similarity matching is carried out on the identified device to be cleared and the overwriting scheme provided by the overwriting scheme library through an overwriting scheme matching module, and the scheme with the similarity reaching more than 90% is selected as the overwriting scheme. If the scheme meeting the similarity requirement does not exist at the moment, the equipment is defined as the identified equipment to be cleared which fails to be matched, and the overwriting test module is waited to carry out overwriting scheme selection test.
And finally, selecting the corresponding overwriting scheme in the overwriting scheme library for overwriting and clearing by using the overwriting scheme loading module for the equipment meeting the similarity requirement, thereby obtaining the equipment with the overwritten function.
Overwrite scheme effect evaluation module
The module has the input of storage space before overwriting and image file data, overwriting equipment and overwriting test equipment, and the output of the module is feedback information of cleared equipment, overwriting evaluation unqualified equipment and overwriting scheme effect evaluation reaching the standard. And evaluating the quality of the overwriting scheme by continuously comparing the difference between the storage space before and after overwriting and the data of the image file, and determining the overwriting scheme meeting the overwriting requirement to be stored in the overwriting scheme library so as to achieve the purpose of continuously expanding and updating the overwriting scheme library. The specific process is shown in fig. 4.
Firstly, the data emptying module is used for emptying all contents of the equipment which is completely overwritten or the equipment which is completely overwritten and tested, and writing the contents into the original pure data packet, so that the overwritten data and the previously stored data can not be browsed on the equipment.
Next, to evaluate the goodness of the selected overwriting scheme, the data content in the blank device needs to be recovered by a data recovery module. The criteria for the evaluation of the overwrite schemes in the present application are: after overwriting, erasing and recovering, the erased device does not have previous data.
Then, 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 are compared through an image file differentiation comparison module.
And finally, evaluating the effect of the overwriting scheme according to an overwriting evaluation module by combining the differentiation result, and outputting the cleaned equipment or the equipment with the unqualified overwriting evaluation according to the evaluation result. If the number of times of recording in the overwrite evaluation module exceeds the upper limit of 90 times, the device is defined as a waste device, and the overwrite scheme cannot be designed.
A qualifying overwrite scheme is required where the recoverable file can only occupy 10% of the storage space and image file package after being overwritten, and where there can only be similar identifiable unopenable files and unidentifiable files. For the equipment which has completed the overwriting or has completed the overwriting test and meets the overwriting requirement, the feedback information of the standard overwriting scheme effect evaluation is transmitted to the corresponding module, so as to expand and update the overwriting scheme library.
Overwrite test module
The module inputs feedback information of identified equipment to be cleared, equipment with unqualified overwriting evaluation and qualified overwriting scheme effect evaluation which fail to match, and outputs test cases of equipment with completed overwriting test and qualified overwriting evaluation. The purpose of the overwrite test module is to select an appropriate overwrite scheme for the device to be overwritten and cleaned, thereby determining the overwrite scheme of the device to be cleaned which fails to match or the device which is not qualified to be overwritten and saving the case in the overwrite scheme library. The overwriting cases comprise equipment information and an overwriting scheme, the overwriting scheme comprises overwriting sequences and overwriting times, the overwriting sequences comprise full 0 sequences, full 1 sequences, random sequences, 0/1 cross sequences, 0/random cross sequences, 1/random cross sequences, 0/1/random cross sequences and the like, the upper limit of the overwriting times is required to be ten times, and the overwriting times are increased once for each test experiment to overwrite the corresponding sequences. The specific process is shown in fig. 5. The specific flow is as follows:
first, the device that is unqualified for overwrite evaluation is reset and restored to the initial state by the device reset module, facilitating the overwrite operation to be enabled.
Then, an overwrite sequence is selected for the reset device or the identified clearing device with failed matching, a test experiment is performed by starting from the all 0 sequence, and the adopted overwrite sequence is saved in an overwrite test scheme recording module.
Then, the overwriting times of the overwriting sequence are selected and stored in the overwriting test scheme recording module, the upper limit of the overwriting times is defined as ten times, and if the overwriting requirements are not met after the number of times exceeds ten times, other overwriting sequences are selected in the next overwriting test experiment to redesign the overwriting scheme.
Finally, the selected overwriting sequence and the number of times of overwriting are performed for the device by using an overwriting module to perform overwriting test. If the equipment after the overwriting test reaches the standard after being evaluated by the overwriting scheme effect evaluation module, feedback information of the overwriting scheme reaching the standard in the overwriting scheme evaluation is received in the overwriting test scheme recording module, so that the test case adopting the overwriting evaluation reaching the standard is updated to the overwriting scheme library.
Overwriting scheme library
The module inputs feedback information of the test cases with the standard overwriting evaluation and the feedback information of the overwriting scheme with the standard overwriting evaluation effect evaluation, outputs the overwriting scheme, and has the functions of storing a large number of overwriting cases and timely expanding and updating according to the overwriting test module. The specific process is shown in fig. 6. The specific process is as follows:
firstly, the overwriting case is provided for the overwriting scheme execution module through the overwriting case library, and then similarity matching is carried out on the overwriting case and the identified equipment to be cleaned.
Then, the device meeting the requirement for similarity matching selects the corresponding overwriting scheme in the overwriting scheme library to serve the overwriting scheme execution module according to the overwriting scheme library.
And then, according to the feedback information of the overwrite scheme effect evaluation standard transmitted by the overwrite scheme effect evaluation module, judging whether the selected scheme is suitable for the overwrite clearing of the experimental equipment at the time, and if the signal of the overwrite scheme effect evaluation standard is received, updating the equipment characteristic information to an overwrite case library to be stored as a new case.
And finally, storing the test cases with the standard overwriting evaluation transmitted by the overwriting test module into an overwriting case library together.
The innovation of the present application is embodied in
1) The method can automatically match with the cases in the overwriting scheme library so as to select a proper overwriting scheme for overwriting;
2) the method can select a proper overwriting scheme from the cases not stored in the overwriting scheme library through the overwriting test module, and timely store the cases into the overwriting scheme library.
Claims (3)
1. A waste equipment overwriting scheme library building method based on cycle test is characterized by comprising the following steps:
firstly, an information extraction module is used for extracting and obtaining storage space before overwriting and mirror image file data of equipment to be cleared, the storage space before overwriting and the mirror image file data are used for analyzing and comparing the difference of the data before overwriting and after overwriting in an overwriting scheme effect evaluation module, and the final effect of the overwriting scheme is evaluated according to the difference;
then, based on the scheme matching mode, performing overwrite clearing operation on the device to be cleared by using an overwrite scheme provided by an overwrite scheme library; if the similar cases in the overwriting scheme library are matched by the overwriting scheme execution module according to the characteristic data of the equipment to be cleared, executing the scheme corresponding to the case to overwrite and clear the equipment to be cleared, and further obtaining the equipment with the overwritten function; if the similar cases cannot be matched in the overwriting scheme database and the matched overwriting scheme cannot be given, defining the equipment as the identified equipment to be cleaned with failed matching;
then, for the equipment with the overwriting completion, the overwriting scheme is evaluated by an overwriting scheme evaluation module in combination with the storage space before overwriting and the image file data obtained in the information extraction module; if the established overwrite standard is reached, obtaining the cleared equipment; if the overwrite standard is not met, defining the equipment as the unqualified overwrite equipment;
then, aiming at the identified equipment to be cleared and the equipment with unqualified overwriting, which fail to be matched, an overwriting scheme circulation experiment is carried out on the equipment under the conditions of different overwriting sequences and overwriting times by using an overwriting test module, and real-time evaluation is carried out by using an overwriting scheme effect evaluation module until an overwriting scheme which can reach the established standard is found;
and finally, storing the test cases and the schemes meeting the overwriting evaluation standards into an overwriting scheme library.
2. The waste equipment overwriting scheme library construction method based on the cycle test as claimed in claim 1, wherein the specific process of the overwriting scheme effect evaluation module is as follows:
firstly, using a data emptying module to empty all contents of overwriting equipment or overwriting test equipment, and writing an original pure data packet to ensure that the overwritten data and the previously stored data cannot be browsed on the equipment;
then, in order to evaluate the superiority and inferiority of the selected overwriting scheme, the data content in the blank device is restored by the data restoring module, and the criteria of the overwriting scheme evaluation are as follows: 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 through an image file differentiation comparison module;
and finally, evaluating the effect of the overwriting scheme according to an overwriting evaluation module by combining the differentiation result, and outputting the cleaned equipment or the equipment with the unqualified overwriting evaluation according to the evaluation result. If the recording times in the overwriting evaluation module exceed the upper limit of 90 times, the equipment is defined as waste equipment, and the overwriting scheme cannot be designed;
requiring a qualifying overwrite scheme after an overwrite, wherein the recoverable file can only occupy 10% of the storage space and the image file package, and wherein there can only be similar identifiable unopenable files and unidentifiable files; for the equipment which has completed the overwriting or has completed the overwriting test and meets the overwriting requirement, the feedback information of the standard overwriting scheme effect evaluation is transmitted to the corresponding module, so as to expand and update the overwriting scheme library.
3. The waste equipment overwriting scheme library construction method based on the cycle test as claimed in claim 1, wherein the specific process of overwriting test modules is as follows:
firstly, resetting the unqualified equipment for overwrite evaluation by an equipment resetting module and restoring the equipment to an initial state;
then, selecting an overwriting sequence aiming at the reset equipment or the identified clearing equipment with failed matching, starting from the all-0 sequence to perform a test experiment, and storing the adopted overwriting sequence into an overwriting test scheme recording module;
then, selecting the overwriting times of the overwriting sequence, and storing the overwriting times into an overwriting test scheme recording module, wherein the upper limit of the overwriting times is defined as ten times, and if the overwriting requirements are not met after the number of times exceeds ten times, selecting other overwriting sequences to redesign the overwriting scheme in the next overwriting test experiment;
finally, the selected overwriting sequence and the number of times of overwriting are performed for the device by using an overwriting module to perform overwriting test. If the equipment after the overwriting test reaches the standard after being evaluated by the overwriting scheme effect evaluation module, feedback information of the overwriting scheme reaching the standard in the overwriting scheme evaluation is received in the overwriting test scheme recording module, so that the test case adopting the overwriting evaluation reaching the standard is updated to the overwriting scheme library.
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