CN107180200B - Customizable desensitization method and system for data files - Google Patents
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Abstract
The invention belongs to the field of information security, and provides a customizable desensitization method and a customizable desensitization system for a data file, wherein the system comprises: the sensitive information setting unit is used for setting child nodes needing to be protected and desensitization method names in the data file under the default condition by system operators; a format converter for converting a file format; the data processing unit is used for storing a desensitization function, verifying the integrity of a default configuration file and modifying the XML file according to desensitization rules stored in the temporary desensitization configuration file; the analyzer is used for analyzing the XML file; and the desensitization rule customizing unit is used for setting a temporary desensitization configuration file. The invention also discloses a method, the data processing unit obtains the document object and the temporary desensitization configuration file of the XML document, and modifies the document object according to the DOM characteristic and the node path. The invention realizes the protection of the sensitive data in the data file and meets the requirement that the data user can carry out customized desensitization on the sensitive data when sharing the data to different third parties.
Description
Technical Field
The invention belongs to the field of information security, relates to a desensitization protection technology for sensitive information in a data file, and particularly relates to a customizable desensitization method and a customizable desensitization system for the data file.
Background
With the rapid development of the internet in recent years, the connection between the internet and the personal life is becoming more and more intimate. The method not only brings living traversal to the user, enables people to browse the webpage, inquire the problem, buy goods and the like anytime and anywhere, but also enables the user to generate a large amount of behavior data related to personal privacy, and the data can be issued or provided to a third party for use due to government supervision, business purposes or research needs. The published or shared data comprises sensitive information of users, if data owners directly publish or share the data, a large amount of personal privacy is leaked, and bad influence is brought to the users, involved units and the society; meanwhile, if the data owner uses an improper way to arbitrarily process the sensitive data, the data user may perform an incorrect analysis on the data, so that the data user makes an incorrect decision, which causes huge economic loss.
In order to prevent leakage of private information at the time of data distribution and sharing, it has been proposed to protect data in an anonymized manner. According to incomplete statistics, the following inventions are disclosed in the prior art for data security in data distribution and sharing.
1. A mixed randomized privacy protection method for social network data release comprises the following steps: the method combines the existing K-anonymity method and the randomization method, can prevent the relocation attack adopting the structure background knowledge, and meets the requirement of social network users on privacy security.
2. A track suppression data release privacy protection system based on frequency and a method thereof are disclosed: according to the data release privacy protection system, a specific track local inhibition method is adopted for anonymous processing.
3. An optimized social network diagram data publishing privacy protection method comprises the following steps: the method carries out privacy protection processing on the data published by the social network according to the data publishing privacy protection method.
4. A data release method and device: according to the invention, the data to be published is clustered according to the attributes of the known classes to obtain the classes of the attributes of the data to be published, and then the data to be published is published according to the classes of different attributes and corresponding publishing methods, so that privacy protection can be provided for the publishing of the data to be published.
In the invention, the data operated by the data user is the source data, and the processed data is directly issued or shared to the third party, so that the data protection requirement when the attacker is the data user in the system cannot be met, and the requirement that the data user performs different degrees of protection on the data shared by the third parties in different levels cannot be met.
Disclosure of Invention
The technical task of the invention is to provide a data file customization desensitization method and system aiming at the defects of the prior art and aiming at realizing the safety of sensitive data of data users in different data use scenes and ensuring that some data with extremely high sensitivity cannot be obtained even if the internal data users do not perform any operation on the original data.
In order to achieve the above object, the present invention adopts the following technical solutions.
1. A customizable desensitization system for data files, characterized by: the system comprises a sensitive information setting unit (1), an analyzer (2), a format converter (3), a data processing unit (4) and a desensitization rule customizing unit (5);
sensitive information setting unit (1): the method is used for initializing desensitization setting of a system operator on a newly received data file, and setting child nodes needing to be protected under the default condition of the data file and corresponding desensitization method names of the child nodes;
a resolver (2): the XML file is analyzed to obtain a document object representing the XML file;
format converter (3): the system comprises a data processing system, a data processing system and a data processing system, wherein the data processing system is used for converting a data file format provided by a data provider into an XML file format and selecting whether to convert the format of an output file or not by a data user;
data processing unit (4): the desensitization function is stored, the integrity of the default configuration file is verified, a document object representing the XML file and the temporary desensitization configuration file are obtained, the document object is modified according to desensitization rules stored in the temporary desensitization configuration file, and finally the content in the document object is written back to the XML file;
desensitization rule customization unit (5): for displaying the default configuration file of the XML file, and for the data user to set the temporary desensitization configuration file.
2. The sensitive information setting unit is used for a system operator to perform initialization desensitization setting on a newly received data file and then storing the setting information in a default configuration file; and after serializing the content in the default configuration file into a character string, the sensitive information setting unit calculates the character string according to a set hash algorithm, and then stores the XML file name and the hash character string in a hash value record file in a storage system.
3. The data processing unit reads a default configuration file of an XML file selected by a data user in the storage system, and if the default configuration file does not exist, a warning is sent to prompt that the XML file is not initialized; otherwise, the default configuration file is subjected to integrity verification.
4. The data processing unit is used for obtaining a document object representing the XML file and a temporary desensitization configuration file, generating a path according to the content in the temporary desensitization configuration file, modifying sensitive data in the document object according to the path, and finally writing the content of the document object back to the XML file. Wherein the temporary desensitization profile stores data user settings and default configuration information set by the system operator.
5. The desensitization rule customizing unit is used for reading and displaying the content in the default configuration file, and is also used for setting a temporary desensitization configuration file by a data user. Wherein, the data user can not modify the default configuration information of the system operator through the desensitization rule customizing unit.
6. The format converter is used for converting the data file with the non-XML file format provided by the data provider into the XML file format and converting the XML file processed by the data processing unit into the data format selected by the data user.
7. The system comprises a data file customization desensitization system, a sensitive information setting unit (1), a resolver (2), a format converter (3), a data processing unit (4) and a desensitization rule customization unit (5); (2) is connected with (4), (3) is connected with (4), and (4) is connected with (5).
8. A customizable desensitization method for data files, characterized in that the method comprises two phases.
(1) An initialization setting stage:
the first step is as follows: the data provider submits a data file, the format converter judges whether the data file is in an XML file format, and if the data file is in the XML file format, the data file is directly stored in the storage system; otherwise, the format converter converts the data file into an XML file format and then stores the data file into the storage system;
the second step is that: the system operator performs initialization desensitization setting on the newly received data file;
and operating the sensitive information setting unit by a system operator, and setting the child node to be protected under the default condition and the corresponding desensitization method name of the child node. The sensitive information setting unit stores the setting information in a default configuration file in the storage system; the sensitive information setting unit serializes the content in the default configuration file into a character string, calculates the character string according to a set hash algorithm, and then stores the XML file name and the hash character string in a hash value record file in a storage system.
(2) A data operation stage: the data user selects the XML file to be operated, the XML file is set as S, the desensitization system reads the XML file S from the storage system, and the operations are carried out on the XML file S as follows:
step 1: the data processing unit reads a default configuration file of a file S in the storage system, and if the default configuration file does not exist, a warning is sent to prompt that the XML file S is not initialized; otherwise, after the content in the default configuration file is serialized into a character string, calculating the character string according to a set hash algorithm, searching and taking out a corresponding hash value according to the file name of the XML file S in a hash value recording file in the storage system, comparing the two hash values, verifying the integrity, if the two hash values are different, the verification fails, prompting an error, and if the two hash values are completely consistent, continuing;
step 2: the parser parses the XML file S to obtain a Document object representing the XML file S, namely a Document object, which is set as W;
and step 3: the desensitization rule customizing unit reads a default configuration file of a file S in the storage system, displays all father nodes, child nodes, desensitization states and corresponding optional desensitization functions in the default configuration file, displays fields marked as 'yes' of the desensitization states as states which need desensitization and can not be cancelled, sets the desensitization rule customizing unit, stores the setting result in a temporary desensitization configuration file, and transfers to the step 4 to continue execution;
and 4, step 4: the data processing unit judges whether the temporary desensitization configuration file has next line data, and if the temporary desensitization configuration file has the next line data, the step 5 is carried out continuously; if no next data exists, go to step 7 and continue to execute;
and 5: if the row is the ith row, obtaining the desensitization state of the ith row in the temporary desensitization configuration file and defining the desensitization state as t, and if the t is 'no', directly turning to the step 4 to continue to execute; otherwise, taking out the desensitization function F of the ith row in the temporary desensitization configuration file, then taking out the parent node of the ith row in the temporary desensitization configuration file as a, defining the child node as b, obtaining a node path D = '/a/b' according to a and b, obtaining a child node set D corresponding to the node path D in the document object W (the specific method can be implemented by programming by professionals, and is not repeated here), and going to step 6 to continue execution;
step 6: judging whether a next child node exists in the child node set D, if so, taking out the child node and defining the child node as s, taking out data M of the child node s, carrying out desensitization processing on M by using a desensitization function F to obtain M, namely M = F (M), replacing a data value M in the child node s by M, and continuing to execute the step 6; if the next child node does not exist in the data set D, turning to the step 4 to continue to execute;
and 7: writing the content of the desensitized document object W back to the XML file S, deleting the document object W, and submitting the XML file to the format converter;
and 8: the format converter acquires an output file format required by a data user, and converts the XML file S into a corresponding file format and then outputs a data file.
The invention discloses a customizable desensitization method and a customizable desensitization system for a data file. Compared with the prior art, the method has the following outstanding advantages.
1. The system operator can set a special default configuration file for each XML file, ensuring different protection for each XML file content.
2. Under the condition that the default configuration file corresponding to the XML file is not changed, the data user can perform customized desensitization setting on the XML file, and the data safety requirements of the data user in different data use scenes are met.
3. For users and developers, the desensitization processing of data does not need to be considered for business data operation, and all desensitization operations are transparent to application layer developers and users.
Drawings
FIG. 1 is a block diagram of a customizable desensitization method and system of data files according to the present invention.
Fig. 2 is a flow chart of desensitization processing of the desensitization system of the present invention on XML files selected by the data user.
Fig. 3 is a diagram illustrating an example of a storage format of a default configuration file in the present invention.
Fig. 4 is a diagram illustrating an exemplary storage format of a temporary desensitization profile according to the present invention.
Fig. 5 is a diagram showing an example of a storage format of a hash value record file in the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. Fig. 1 is a block diagram of a system, which mainly includes a data processing unit, a sensitive information setting unit, a parser, a format converter, and a desensitization rule customizing unit, wherein a default configuration file is stored in a storage system. FIG. 2 is a flow chart of desensitization processing of the desensitization system on XML files selected by data users, and the specific steps are realized by the following steps of data operation phase; FIG. 3 is an exemplary diagram of a storage format for a default configuration file for storing default configuration information set by an operator of the system. FIG. 4 is an exemplary diagram of a storage format of a temporary desensitization configuration file for a data processing unit to determine whether node data in an XML file is sensitive data. Fig. 5 is an exemplary diagram of a storage format of a hash value record file, which is used for storing an XML file name and a hash value obtained by hashing a default configuration file corresponding to the XML file according to a set hash algorithm.
And (5) initializing a setting phase.
The first step is as follows: the data provider submits a data file, the format converter judges whether the data file is in an XML file format, and if the data file is in the XML file format, the data file is directly stored in the storage system; otherwise, the format converter converts the data file into an XML file format and then stores the data file into the storage system.
The second step is that: the method comprises the steps that a system operator carries out initialization desensitization setting on a newly received data file, the system operator operates a sensitive information setting unit, and child nodes needing to be protected under default conditions and corresponding desensitization method names of the child nodes are set. The setting information is saved in a default configuration file of the XML file in the storage system.
The third step: the sensitive information setting unit serializes the content in the default configuration file into a character string, calculates the character string according to a set hash algorithm, and then stores the XML file name and the hash character string in a hash value record file in a storage system.
And (4) a data operation phase.
The first step is as follows: the data user selects the XML file to be manipulated, set as S, which the desensitization system reads from the storage system.
The second step is that: the data processing unit reads a default configuration file of the XML file S in the storage system, and if the default configuration file does not exist, a warning is sent to prompt that the XML file S is not initialized; otherwise, after the content in the default configuration file is serialized into a character string, the character string is calculated according to a set hash algorithm.
The third step: and the data processing unit searches and takes out the corresponding hash value in the hash value record file in the storage system according to the file name of the S, compares the two hash values, verifies the integrity, if the two hash values are different, the verification fails, prompts an error, and if the two hash values are completely consistent, continues.
The fourth step: the parser parses the XML file S to obtain a Document object W representing the XML file S, i.e., a Document object W.
The fifth step: and the desensitization rule customizing unit reads the default configuration file of the XML file in the storage system, displays all the father nodes, the child nodes, the desensitization states and the corresponding optional desensitization functions in the default configuration file, and simultaneously displays the nodes with the desensitization states marked as 'yes' as desensitization and unremovable states.
And a sixth step: and the data user customizes the unit setting through the desensitization rule and stores the setting result in a temporary desensitization configuration file.
The seventh step: the data processing unit judges whether the temporary desensitization configuration file has next line of data, and if the temporary desensitization configuration file has the next line of data, the step eight is carried out continuously; otherwise, go to the tenth step to continue execution.
Eighth step: if the line in the temporary desensitization configuration file is the ith line, obtaining the desensitization state of the ith line and defining the desensitization state as t, and if the t is 'no', directly switching to the seventh step to continue execution; otherwise, the desensitization function F in the ith row is taken out, then the parent node in the ith row is taken out and defined as a, the child node is defined as b, the node path D = '/a/b' is obtained according to a and b, the child node set D corresponding to the node path D is obtained in the document object W (the specific method can be implemented by programming by professionals, and is not described herein), and the operation is continued in the ninth step.
The ninth step: judging whether the next child node exists in the child node set D, if so, taking out the child node and defining the child node as s, taking out the data M of the child node s, carrying out desensitization treatment on M by using a desensitization function F to obtain M, namely M = F (M), replacing the data value M in the child node s by M, and continuing to execute the ninth step; and if the next child node does not exist in the data set D, the seventh step is carried out continuously.
The tenth step: the data processing unit writes the contents of the desensitized document object W back to the XML file S, deletes the document object W, and submits the XML file to the format converter.
The eleventh step: the format converter acquires a file format which needs to be output by a data user, and converts the XML file S into a corresponding file format and then outputs a data file.
Claims (1)
1. The customizable desensitization method of the data file is characterized by comprising two stages:
(1) an initialization setting stage:
the first step is as follows: the data provider submits a data file, the format converter judges whether the data file is in an XML file format, and if the data file is in the XML file format, the data file is directly stored in the storage system; otherwise, the format converter converts the data file into an XML file format and then stores the data file into the storage system;
the second step is that: the system operator performs initialization desensitization setting on the newly received data file;
a system operator operates a sensitive information setting unit and sets a child node to be protected under a default condition and a corresponding desensitization method name of the child node;
the third step: the sensitive information setting unit stores the setting information in a default configuration file in the storage system; after the sensitive information setting unit serializes the content in the default configuration file into a character string, the character string is calculated according to a set hash algorithm, and then the XML file name and the hash character string are stored in a hash value record file in a storage system;
(2) a data operation stage: the data user selects the XML file to be operated, the XML file is set as S, the desensitization system reads the XML file S from the storage system, and the operations are carried out on the XML file S as follows:
step 1: the data processing unit reads a default configuration file of a file S in the storage system, and if the default configuration file does not exist, a warning is sent to prompt that the XML file S is not initialized; otherwise, after the content in the default configuration file is serialized into a character string, calculating the character string according to a set hash algorithm, searching and taking out a corresponding hash value according to the file name of the XML file S in a hash value recording file in the storage system, comparing the two hash values, verifying the integrity, if the two hash values are different, the verification fails, prompting an error, and if the two hash values are completely consistent, continuing;
step 2: the parser parses the XML file S to obtain a Document object representing the XML file S, namely a Document object, which is set as W;
and step 3: the desensitization rule customizing unit reads a default configuration file of a file S in the storage system, displays all father nodes, child nodes, desensitization states and corresponding optional desensitization functions in the default configuration file, displays fields marked as 'yes' of the desensitization states as states which need desensitization and can not be cancelled, sets the desensitization rule customizing unit, stores the setting result in a temporary desensitization configuration file, and transfers to the step 4 to continue execution;
and 4, step 4: the data processing unit judges whether the temporary desensitization configuration file has next line data, and if the temporary desensitization configuration file has the next line data, the step 5 is carried out continuously; if no next data exists, go to step 7 and continue to execute;
and 5: if the row is the ith row, obtaining the desensitization state of the ith row in the temporary desensitization configuration file and defining the desensitization state as t, and if the t is 'no', directly turning to the step 4 to continue to execute; otherwise, taking out the desensitization function F of the ith row in the temporary desensitization configuration file, then taking out the parent node of the ith row in the temporary desensitization configuration file as a, defining the child node as b, obtaining a node path D = '/a/b' according to a and b, obtaining a child node set D corresponding to the node path D in the document object W (the specific method can be implemented by programming by professionals, and is not repeated here), and going to step 6 to continue execution;
step 6: judging whether a next child node exists in the child node set D, if so, taking out the child node and defining the child node as s, taking out data M of the child node s, carrying out desensitization processing on M by using a desensitization function F to obtain M, namely M = F (M), replacing a data value M in the child node s by M, and continuing to execute the step 6; if the next child node does not exist in the data set D, turning to the step 4 to continue to execute;
and 7: writing the content of the desensitized document object W back to the XML file S, deleting the document object W, and submitting the XML file to the format converter;
and 8: the format converter acquires an output file format required by a data user, and converts the XML file S into a corresponding file format and then outputs a data file.
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