CN103064764A - Evidence obtaining method capable of rapidly recovering messages deleted by Android mobile phone - Google Patents
Evidence obtaining method capable of rapidly recovering messages deleted by Android mobile phone Download PDFInfo
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Abstract
The invention discloses an evidence obtaining method capable of rapidly recovering messages deleted by Android mobile phone. The method includes: firstly extracting directly viewable information of a user data file in the mobile phone, obtaining storage characteristics of a database table structure according to the directly viewable information, and further separating an unused space in a database; trying to match characteristics of a normal record in the unused space, verifying matched data, obtaining a deleted record, partitioning subsequent data according to field length definition of the record, restoring content of main fields, contrasting restored data to the normal record, and adding in a record list through logical judgment; and matching the unused space continuously until all unused spaces are processed. The vidence obtaining method capable of rapidly recovering messages deleted by the Android mobile phone has the advantages of being rapid to recover, convenient to use and strong in reliability.
Description
Technical field
The present invention relates to mobile device information processing and deletion information and recover the field, specifically, specially refer to a kind of evidence collecting method of fast quick-recovery Android mobile phone deletion information.
Background technology
The methods of Mobile Phone Forensics are constantly being upgraded and are being improved at present, just the essential information in the mobile phone (such as the contact person, message registration and short message etc.) are simply extracted and are fixed at first.Afterwards along with the appearance of smart mobile phone, Mobile Phone Forensics has comprised also that application programs data (such as immediate communication tool, social networks instrument, location navigation instrument etc.) are extracted, fixing and association analysis etc.
The judicial personnel not only needs to extract the information of current existence on the mobile phone, the information special concern of also suspect having been deleted in investigation or evidence obtaining process.It mainly is following two kinds that the method for in the prior art Android mobile phone being deleted recovery has:
1) first method is the image file by the storage medium of making mobile phone.
If use simple DD order or other mirror image softwares, owing to be subjected to the structural limitations of the file system of mobile phone accumulation layer use, then can not acquire the information of complete file system, the image file that obtains can't be recombinated and is reduced into original file system.Go back in the situation of original file system can not recombinating, the positioning difficulty of concrete deletion information is increased, the identification of deletion information and the difficulty of checking are increased, the difficulty that deletion information and not deletion information are distinguished increases.
Although if use complicated external tool can obtain complete image file, if but image file is imperfect or larger, add the complexity effect of mobile phone storage data, the information that often recovers is more in disorder, or mixed a lot of fully irrelevant information inside, the effect of recovery is general or very poor.
2) second method is the information storage file to be positioned the general mode of rear use process.
Personal information in the general intelligence mobile phone is stored in the database file, usage data storehouse scan tool can view list structure and the field information of storage, but these information are optimized for storage, so when directly checking, the association between the field etc. needs evidence obtaining personnel oneself conjecture and checking.And the field information that the based on database storage organization recovers, need equally the evidence obtaining personnel these information associations, database professional knowledge to the evidence obtaining personnel is had relatively high expectations, and more or list structure is than under the complicated situation at database table, and accuracy and reliability can non-constants.
In sum, for the defective of prior art, need especially a kind of evidence collecting method of fast quick-recovery Android mobile phone deletion information, to solve above-mentioned deficiency.
Summary of the invention
The object of the present invention is to provide a kind of evidence collecting method of fast quick-recovery Android mobile phone deletion information,
Overcome the deficiency in the conventional art, thereby realized purpose of the present invention.
Technical matters solved by the invention can realize by the following technical solutions:
A kind of evidence collecting method of fast quick-recovery Android mobile phone deletion information, described method comprises the steps:
1) at first uses the pull order that provides among the debugging developing instrument Android Debug Bridge that provides among the Android SDK to extract subscriber data file in the mobile phone, and it is further analyzed, obtain and directly to check information in the subscriber data file;
2) read the data content that directly to check in the information by API, then come the concrete meaning of each field in the specified data content by contrast verification, obtain the visual data on the mobile phone after reconfiguring, also obtain the storage feature of database table structure simultaneously;
3) the storage character separation by database table structure goes out the not usage space in the database;
4) extract the feature of normal recordings by the storage organization of analyzing normal recordings in the Android mobile phone, then attempting this feature of coupling in the usage space by regular expression, and the data that match are verified; If its structure and normal recordings are consistent, think that then this is a record of having deleted, then in conjunction with the definition of the field length of this record, data are thereafter cut apart, to reduce the content of its each main field;
5) data that restore and the normal recordings of resolving by API are compared, if key message is identical, think that then this is a redundant data that has existed or had identical record to be resumed out in logic, do not add in the record tabulation; If key message is not identical, then add in the record tabulation;
6) continue to mate not in the usage space, until all not usage spaces all are disposed.
In one embodiment of the invention, described step 1) further comprises a kind of method of the root of obtaining authority, and the method is directly to promote outside root authority by adb root; If adb root prompting can't rise to the root authority, then rise to root user's authority by the script of an interim root.
In one embodiment of the invention, in the described step 5), when adding to the data that restore in the record tabulation with this data markers for deleting, show that this is a record that is resumed out.
In one embodiment of the invention, described subscriber data file is the SQLite3 database format, can read normally wherein data content by API.
In one embodiment of the invention, described debugging developing instrument Android Debug Bridge connects mobile phone by the application program debugging interface.
Beneficial effect of the present invention is as follows:
1) fast quick-recovery: the method is owing to prior list structure and storage organization to customer data base is studied and extracted feature, so speed is very fast in the information of undeleting.
2) easy to use: deletion recovers automatically to carry out after resolving normal recordings, need not the user and carries out any manual operation and analysis.
3) reliability is strong: to by scanning for concrete feature, specific aim is very strong, so the data of general recent deletion can both recover.
Description of drawings
Fig. 1 is the schematic flow sheet of the evidence collecting method of fast quick-recovery Android mobile phone deletion information of the present invention.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the present invention.
As shown in Figure 1, the evidence collecting method of a kind of fast quick-recovery Android mobile phone deletion information of the present invention, its job step is as follows:
1) whether opened USB debugs (application program debugging interface) at first to need to determine target mobile phones, owing to most of third party's cell phone managing software all needs to use this function, so most of mobile phone is all opened.If do not open then need to open in the setting-〉 application program.
2) direct extraction document.Subscriber data file (such as address list file/data/data/com.android.providers.contacts/databases/conta cts.db) in the pull order trial extraction mobile phone that provides among the debugging developing instrument Android Debug Bridge (adb) that provides among the Android SDK is provided, because subscriber data file is private information, if prompting access denied, or the error message of Insufficient privilege and so on, then need the root authority to access.Attempt promoting outside root authority by adb root, continue to attempt extracting subscriber data file by top method.
3) promote the Root authority temporarily.If adb root prompting can't rise to the root authority, then can rise to by the script (by the mode of system vulnerability) of an interim root root user's authority, in the situation that obtains outside root authority, usually can both normal extraction arrive file.
4) extract user data.Extract after the needed subscriber data file, at first need to extract the already present data of user (data that can view at mobile phone), general this document is the SQLite3 database format, just can read normally wherein data content by its API that provides.Owing to there is not the original design document, need to determine by contrast verification the concrete meaning of each field, just can reduce visual data on the mobile phone after reconfiguring, the while also obtains the storage feature of database table structure.
5) separate not usage space.Because the SQLite database is file based database application, the operation of its deletion data is that mark should not re-use in the zone, so the data major part after the deletion is also all preserved hereof, no longer as seen, also have access to binary form in the time of just by data base querying.Can isolate all untapped spaces by the storage feature of data database table structure.
6) data that undelete.Extract the feature of record by the storage organization of analyzing normal recordings, then do not attempting this feature of coupling in the usage space by the mode of canonical, the data that match are verified, be consistent such as fruit structure and normal record, think that then this is a record of having deleted, then in conjunction with the field length definition of record, data are thereafter cut apart, to reduce the content of its each main field.
7) filter repeating data.The data that recover and the normal recordings of resolving by API are compared, if key message (such as the time, content, number etc.) is identical, thought that just this is a redundant data (existed in logic or had identical record to be resumed out).Then add in the record tabulation if not redundant data, be labeled as simultaneously and delete, show that this is a record that is resumed out.
8) continue to mate content in the usage space not, until all not usage spaces all are disposed.
More than show and described ultimate principle of the present invention and principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; that describes in above-described embodiment and the instructions just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.The claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (5)
1. the evidence collecting method of a fast quick-recovery Android mobile phone deletion information is characterized in that described method comprises the steps:
1) at first uses the pull order that provides among the debugging developing instrument Android Debug Bridge that provides among the Android SDK to extract subscriber data file in the mobile phone, and it is further analyzed, obtain and directly to check information in the subscriber data file;
2) read the data content that directly to check in the information by API, then come the concrete meaning of each field in the specified data content by contrast verification, obtain the visual data on the mobile phone after reconfiguring, also obtain the storage feature of database table structure simultaneously;
3) the storage character separation by database table structure goes out the not usage space in the database;
4) extract the feature of normal recordings by the storage organization of analyzing normal recordings in the Android mobile phone, then attempting this feature of coupling in the usage space by regular expression, and the data that match are verified; If its structure and normal recordings are consistent, think that then this is a record of having deleted, then in conjunction with the definition of the field length of this record, data are thereafter cut apart, to reduce the content of its each main field;
5) data that restore and the normal recordings of resolving by API are compared, if key message is identical, think that then this is a redundant data that has existed or had identical record to be resumed out in logic, do not add in the record tabulation; If key message is not identical, then add in the record tabulation;
6) continue to mate not in the usage space, until all not usage spaces all are disposed.
2. the evidence collecting method of a kind of fast quick-recovery Android mobile phone deletion information according to claim 1 is characterized in that described step 1) further comprises a kind of method of the root of obtaining authority, and the method is directly to promote outside root authority by adb root; If adb root prompting can't rise to the root authority, then rise to root user's authority by the script of an interim root.
3. a kind of fast quick-recovery Android mobile phone according to claim 1 is deleted the evidence collecting method of information, it is characterized in that, in the described step 5), when adding to the data that restore in the record tabulation with this data markers for deleting, show that this is a record that is resumed out.
4. the evidence collecting method of a kind of fast quick-recovery Android mobile phone deletion information according to claim 1 is characterized in that described subscriber data file is the SQLite3 database format, can read normally wherein data content by API.
5. the evidence collecting method of a kind of fast quick-recovery Android mobile phone deletion information according to claim 1 is characterized in that described debugging developing instrument Android Debug Bridge connects mobile phone by the application program debugging interface.
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| CN103324482A (en) * | 2013-06-27 | 2013-09-25 | 苏州创智宏云信息科技有限公司 | Android one-key root permission software |
| CN103561176A (en) * | 2013-11-07 | 2014-02-05 | 腾讯科技（深圳）有限公司 | Method and device for acquiring call records of terminal device and terminal device |
| CN103747028A (en) * | 2013-11-27 | 2014-04-23 | 上海斐讯数据通信技术有限公司 | Method for granting user temporary root authority |
| CN103778259A (en) * | 2014-03-03 | 2014-05-07 | 公安部第三研究所 | Method for realizing data recovery of smart phone on basis of Sqlite3 |
| CN103793298A (en) * | 2014-03-03 | 2014-05-14 | 公安部第三研究所 | Method for reading Android mobile phone information |
| CN103942054A (en) * | 2014-04-25 | 2014-07-23 | 北京邮电大学 | Data evidence obtaining system based on Android |
| CN104035839A (en) * | 2014-06-12 | 2014-09-10 | 上海交通大学 | Method for implementation of recovery of Android system private data |
| CN104142830A (en) * | 2014-08-11 | 2014-11-12 | 四川效率源信息安全技术有限责任公司 | Method and device for extracting application data of smart phone by script plug-in technology |
| CN104156430A (en) * | 2014-08-11 | 2014-11-19 | 四川效率源信息安全技术有限责任公司 | Device and method for fast extracting Android mobile phone data |
| CN104182541A (en) * | 2014-09-05 | 2014-12-03 | 四川效率源信息安全技术有限责任公司 | Method for showing smart phone data information |
| CN104850470A (en) * | 2015-05-12 | 2015-08-19 | 浪潮电子信息产业股份有限公司 | Method for fast recovering mis-deleted data under linux system |
| CN104932838A (en) * | 2015-06-09 | 2015-09-23 | 南京邮电大学 | Digital forensic method and system based on Android memory dump technology |
| CN105022949A (en) * | 2015-07-02 | 2015-11-04 | 盘石软件（上海）有限公司 | Handheld device for evidence fixing of Android phones and fixing method |
| CN105353665A (en) * | 2015-12-08 | 2016-02-24 | 武汉虹旭信息技术有限责任公司 | Mobile phone deleted information recovery system based on Android system and method thereof |
| CN105912423A (en) * | 2016-04-07 | 2016-08-31 | 上海互盾信息科技有限公司 | Data recovery and forensic method |
| CN106547771A (en) * | 2015-09-18 | 2017-03-29 | 四川效率源信息安全技术股份有限公司 | The method that web page browsing record based on Android system recovers |
| CN106557387A (en) * | 2015-09-30 | 2017-04-05 | 四川效率源信息安全技术股份有限公司 | The method that news client browing record based on Android system recovers |
| CN106934052A (en) * | 2017-03-16 | 2017-07-07 | 维沃移动通信有限公司 | A kind of media text handling method and mobile terminal |
| CN107332974A (en) * | 2017-05-23 | 2017-11-07 | 成都联宇云安科技有限公司 | A kind of method for recovering Android mobile phone address list and note data in the case where being not backed up data |
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| CN108021469B (en) * | 2016-10-31 | 2020-10-27 | 中国电信股份有限公司 | Data recovery method and device |
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| CN106934052A (en) * | 2017-03-16 | 2017-07-07 | 维沃移动通信有限公司 | A kind of media text handling method and mobile terminal |
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Application publication date: 20130424 |