CN109246297A - A kind of method, apparatus and storage medium of determining mobile terminal factory reset time - Google Patents
A kind of method, apparatus and storage medium of determining mobile terminal factory reset time Download PDFInfo
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- CN109246297A CN109246297A CN201810993089.4A CN201810993089A CN109246297A CN 109246297 A CN109246297 A CN 109246297A CN 201810993089 A CN201810993089 A CN 201810993089A CN 109246297 A CN109246297 A CN 109246297A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
- H04M1/724—User interfaces specially adapted for cordless or mobile telephones
- H04M1/72448—User interfaces specially adapted for cordless or mobile telephones with means for adapting the functionality of the device according to specific conditions
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
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Abstract
The present invention provides the method, apparatus and storage medium of a kind of determining mobile terminal factory reset time, this method comprises: extraction step, the extracting time information from the system file of the mobile terminal；It determines step, the time of mobile terminal factory reset is determined based on the temporal information.The present invention passes through the extracting time information from the system file of the mobile terminal, it is then based on the time that the temporal information determines mobile terminal factory reset, pass through the analysis to system file and log, determine the time that the last time mobile terminal is in active state, earliest time in eliminating system after some dead times in the remaining time, and then determine the incremental time of system, to estimate the time that terminal the last time carries out factory reset, the accuracy of determining terminal factory reset operating time is improved.
Description
Technical field
The present invention relates to technical field of data security, especially a kind of side of determining mobile terminal factory reset time
Method, device and storage medium.
Background technique
Smart phone refers to as PC there is independent operating system, independent running space, Ke Yiyou
User voluntarily installs the program of the third party service providers such as software, game, navigation offer, and can be by mobile communication network come real
The general name of existing wireless network access type of cell phone.To which smart phone is widely used, sometimes, needing to obtain mobile phone
The time of factory reset, for example be possible in Mobile Phone Forensics practice process to encounter the mobile phone collected evidence and be resumed factory
How setting for the mobile phone for being resumed default setting estimates its factory reset operating time, in current all hands
Machine evidence obtaining product cannot all export relevant as a result, and in certain real works to mobile phone " when factory reset operates
Between " judgement have highly important effect.
Summary of the invention
The present invention is directed to above-mentioned defect in the prior art, proposes following technical solution.
A kind of method of determining mobile terminal factory reset time, this method comprises:
Extraction step, the extracting time information from the system file of the mobile terminal；
It determines step, obtains maximum time information and minimum time information from the temporal information to determine mobile terminal
The time of factory reset.
Further, the system of the mobile terminal be Android system, the mobile terminal be mobile phone, tablet computer,
Laptop or PDA.
Further, the operation of the extraction step are as follows:
Journal file under "/cache/recovery/ " catalogue of Android system is scanned for, is looked into journal file
The time T for looking for ro.build.date.utc information determining system to compilebuild；
To the resource information file set F1 { F under "/data " catalogue in the file system of Android system1, F2…FnIn
Temporal information is filtered and converts to obtain the time set T { T of a sequence1, T2…Tn}；
Determine Tmax, TmaxMaximum time in expression system, i.e., the time that the last mobile terminal is in active state,
Wherein,
Tmax=fmax(T1, T2…Tn)；
Determine Tmin, TminMinimum time in expression system, when as remaining after some dead times in eliminating system
Between in earliest time；Wherein, n indicates the number of file.
Further, T is determinedminMethod are as follows:
Judge whether there is " time/ " catalogue in resource information file set F1, if it is, the time of the resource of catalog is
The time of system time, as T are set after mobile phone factory resetmin；
Or
The time set T ' { T ' that the most time value of frequency of occurrence in time set T is filtered out to sort1, T '2…T
′m, from T ' taking-up minimum value Tmin=fmin(T′1, T '2…T′m), judge Tlocal-Tbuild> Tmax-TminIt is whether true, if
It is TminFor required value, if not, by the TminMinimum value T after obtaining the deletion after the middle deletion of T ' again in setmin, and
Judge Tlocal-Tbuild> Tmax-TminIt is whether true, aforesaid operations are repeated, meet T until findinglocal-Tbuild> Tmax-Tmin's
Tmin；Wherein, TlocalFor the current time of mobile terminal, m is the integer less than n.
Further, the operation of the determining step are as follows: calculate Delta Time TΔ=Tmax-Tmin, then determine movement
The time T of terminal factory resetr=Tlocal-TΔ。
The invention also provides the device of determining mobile terminal factory reset time a kind of, which includes:
Extraction unit, for the extracting time information from the system file of the mobile terminal；
Determination unit, for obtaining maximum time information and minimum time information from the temporal information to determine movement
The time of terminal factory reset.
Further, the system of the mobile terminal be Android system, the mobile terminal be mobile phone, tablet computer,
Laptop or PDA.
Further, the operation that the extraction unit executes are as follows:
Journal file under "/cache/recovery/ " catalogue of Android system is scanned for, is looked into journal file
The time T for looking for ro.build.date.utc information determining system to compilebuild；
To the resource information file set F1 { F under "/data " catalogue in the file system of Android system1, F2…FnIn
Temporal information is filtered and converts to obtain the time set T { T of a sequence1, T2…Tn}；
Determine Tmax, TmaxMaximum time in expression system, i.e., the time that the last mobile terminal is in active state,
Wherein,
Tmax=fmax(T1, T2…Tn)；
Determine Tmin, TminMinimum time in expression system, when as remaining after some dead times in eliminating system
Between in earliest time；Wherein, n indicates the number of file.
Further, T is determinedminMethod are as follows:
Judge whether there is " time/ " catalogue in resource information file set F1, if it is, the time of the resource of catalog is
The time of system time, as T are set after mobile phone factory resetmin；
Or
The time set T ' { T ' that the most time value of frequency of occurrence in time set T is filtered out to sort1, T '2…T
′m, from T ' taking-up minimum value Tmin=fmin(T′1, T '2…T′m), judge Tlocal-Tbuild> Tmax-TminIt is whether true, if
It is TminFor required value, if not, by the TminMinimum value T after obtaining the deletion after the middle deletion of T ' again in setmin, and
Judge Tlocal-Tbuild> Tmax-TminIt is whether true, aforesaid operations are repeated, meet T until findinglocal-Tbuild> Tmax-Tmin's
Tmin；Wherein, TlocalFor the current time of mobile terminal, m is the integer less than n.
Further, the operation that the determination unit executes are as follows: calculate Delta Time TΔ=Tmax-Tmin, then determine
The time T of mobile terminal factory resetr=Tlocal-TΔ。
The invention also provides a kind of computer readable storage medium, computer program generation is stored on the storage medium
Code, above-mentioned any method is executed when the computer program code is computer-executed.
Technical effect of the invention are as follows: the present invention by the extracting time information from the system file of the mobile terminal,
It is then based on the time that the temporal information determines mobile terminal factory reset, i.e., by dividing system file and log
Analysis determines the time that the last time mobile terminal is in active state, the remaining time after some dead times in eliminating system
In earliest time, and then the incremental time of system is determined, so that estimating terminal the last time carries out factory reset
Time, improve the accuracy of determining terminal factory reset operating time.
Detailed description of the invention
By reading a detailed description of non-restrictive embodiments in the light of the attached drawings below, the application's is other
Feature, objects and advantages will become more apparent upon.
Fig. 1 is a kind of process of the method for determining mobile terminal factory reset time of embodiment according to the present invention
Figure.
Fig. 2 is a kind of structure of the device of determining mobile terminal factory reset time of embodiment according to the present invention
Figure.
Specific embodiment
The application is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining related invention, rather than the restriction to the invention.It also should be noted that in order to
Convenient for description, part relevant to related invention is illustrated only in attached drawing.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
The principle of the present invention is, by taking Android phone as an example, according to Delta Time TΔSpeculate recovery time, obtains
As a result it is accurate to hour, finds out the maximum time T in mobile phonemaxWith minimum time Tmin, TmaxIt is newest in mobile phone file system
Time, TminFor the earliest time in the remaining time after some dead times of rejecting, the temporal information for needing to reject is mainly hand
System default is the time of some system files setting when machine System build, these times are simultaneously irregular, but generally mobile phone system
The time T on the same day is translated in unified editingbuild.The temporal information for extracting resource in mobile phone file system is analyzed to obtain TmaxAnd Tmin, increment
Time is exactly TmaxAnd TminDifference, then with local current time (current local time) TlocalSubtracting Delta Time can obtain
Obtain the time T of mobile phone the last time factory resetr。
Fig. 1 shows the method for determining mobile terminal factory reset time of the invention a kind of, this method comprises:
Extraction step S101, the extracting time information from the system file of the mobile terminal.
In one embodiment, the system of the mobile terminal be Android system, naturally it is also possible to be other systems such as, apple
Fruit system etc., the mobile terminal are mobile phone, tablet computer, laptop or PDA etc., and certainly a kind of terminal is also possible to
Others can be portable electronic equipment.
It determines step S102, the time of mobile terminal factory reset is determined based on the temporal information.
For the time for accurately determining mobile terminal factory reset, need to extract phase from system file and journal file
The temporal information answered, this is committed step of the invention, and the operation of the extraction step S101 is as follows:
In one embodiment, the journal file under "/cache/recovery/ " catalogue of Android system is searched
Rope searches the time T of ro.build.date.utc information determining system compiling in journal filebuild.It takes the mobile phone as an example,
There are some journal files under mobile phone "/cache/recovery/ " catalogue, mobile phone enters recovery mode every time can all generate one
Part journal file, wherein journal file has recorded the log that last time enters recovery mode, searches in journal file
Ro.build.date.utc information is it can be concluded that the time that mobile phone dispatches from the factory.
In one embodiment, to the resource information file set under "/data " catalogue in the file system of Android system
F1{F1, F2…FnIn temporal information be filtered and convert to obtain the time set T { T of a sequence1, T2…Tn}.Such as, when
Between set in identical temporal information can be filtered, the number of repetition maximum time is removed
Determine Tmax, TmaxMaximum time in expression system, i.e., the time that the last mobile terminal is in active state,
Its foundation is: "/data/system " catalogue has recorded the maximum time in system, the catalogue record in mobile phone file system
The time that the last mobile phone is in active state checks that resource time can confirm T under the catalogue in F1max, wherein
Tmax=fmax(T1, T2…Tn)。
Determine Tmin, TminMinimum time in expression system, when as remaining after some dead times in eliminating system
Between in earliest time；Wherein, n indicates the number of file.
Determine TminMethod it is more complicated, main following two, this is also one of important inventive point of the invention, determine
TminOne of method are as follows: judge whether there is " time/ " catalogue in resource information file set F1, if it is, the resource of catalog
Time be mobile phone factory reset after be arranged system time time, as Tmin。
Determine TminMethod two are as follows: the most time value of frequency of occurrence in time set T is filtered out (its it is theoretical according to
According to are as follows: data subregion restores after mobile phone factory reset, and many resources are reset under data subregion, that is, there are many resources
Time in TbuildNear, and these resources being reset are often very more, and these times without practical significance, need to eliminate
That most temporal information of occurrence number) the time set T ' { T ' that must sort1, T '2…T′m, from T ' taking-up minimum value Tmin=
fmin(T′1, T '2…T′m), judge Tlocal-Tbuild> Tmax-TminIt is whether true, if so, TminFor required value, if not,
By the TminMinimum value T after obtaining the deletion after the middle deletion of T ' again in setmin, and judge Tlocal-Tbuild> Tmax-Tmin
It is whether true, aforesaid operations are repeated, meet T until findinglocal-Tbuild> Tmax-TminTmin；Wherein, TlocalIt is mobile whole
The current time at end, m are the integer less than n.
The operation of the determining step S102 are as follows: calculate Delta Time TΔ=Tmax-Tmin, then determine that mobile terminal restores
The time T of default settingr=Tlocal-TΔ。
More mobile phones are tested using this method, e.g., test samsung c5000, vivo x7, LeEco x620,
The mobile phone recovery time of making the product obtained is more conform with actual conditions.
The present invention can reject invalid time data from plenty of time information present in mobile terminal, to estimate
The time that mobile terminal the last time carries out factory reset out is estimated if mobile terminal did not carry out the operation
As a result the time used for the first time for mobile terminal.
With further reference to Fig. 2, as the realization to method shown in above-mentioned Fig. 1, this application provides a kind of determining mobile whole
One embodiment of the device of factory reset time is held, the Installation practice is corresponding with embodiment of the method shown in FIG. 1,
The device specifically may include in various electronic equipments.
Fig. 2 shows the device of determining mobile terminal factory reset time of the invention a kind of, which includes:
Extraction unit 201, for the extracting time information from the system file of the mobile terminal.
In one embodiment, the system of the mobile terminal be Android system, naturally it is also possible to be other systems such as, apple
Fruit system etc., the mobile terminal are mobile phone, tablet computer, laptop or PDA etc., and certainly a kind of terminal is also possible to
Others can be portable electronic equipment.
Determination unit 202, for determining the time of mobile terminal factory reset based on the temporal information.
For the time for accurately determining mobile terminal factory reset, need to extract phase from system file and journal file
The temporal information answered, this is committed step of the invention, and the operation that the extraction unit 201 executes is as follows:
In one embodiment, the journal file under "/cache/recovery/ " catalogue of Android system is searched
Rope searches the time T of ro.build.date.utc information determining system compiling in journal filebuild.It takes the mobile phone as an example,
There are some journal files under mobile phone "/cache/recovery/ " catalogue, mobile phone enters recovery mode every time can all generate one
Part journal file, wherein journal file has recorded the log that last time enters recovery mode, searches in journal file
Ro.build.date.utc information is it can be concluded that the time that mobile phone dispatches from the factory.
In one embodiment, to the resource information file set under "/data " catalogue in the file system of Android system
F1{F1, F2…FnIn temporal information be filtered and convert to obtain the time set T { T of a sequence1, T2…Tn}.Such as, when
Between set in identical temporal information can be filtered, the number of repetition maximum time is removed
Determine Tmax, TmaxMaximum time in expression system, i.e., the time that the last mobile terminal is in active state,
Its foundation is: "/data/system " catalogue has recorded the maximum time in system, the catalogue record in mobile phone file system
The time that the last mobile phone is in active state checks that resource time can confirm T under the catalogue in F1max, wherein
Tmax=fmax(T1, T2…Tn)。
Determine Tmin, TminMinimum time in expression system, when as remaining after some dead times in eliminating system
Between in earliest time；Wherein, n indicates the number of file.
Determine TminMethod it is more complicated, main following two, this is also one of important inventive point of the invention, determine
TminOne of method are as follows: judge whether there is " time/ " catalogue in resource information file set F1, if it is, the resource of catalog
Time be mobile phone factory reset after be arranged system time time, as Tmin。
Determine TminMethod two are as follows: the most time value of frequency of occurrence in time set T is filtered out (its it is theoretical according to
According to are as follows: data subregion restores after mobile phone factory reset, and many resources are reset under data subregion, that is, there are many resources
Time in TbuildNear, and these resources being reset are often very more, and these times without practical significance, need to eliminate
That most temporal information of occurrence number) the time set T ' { T ' that must sort1, T '2…T′m, from T ' taking-up minimum value Tmin=
fmin(T′1, T '2…T′m), judge Tlocal-Tbuild> Tmax-TminIt is whether true, if so, TminFor required value, if not,
By the TminMinimum value T after obtaining the deletion after the middle deletion of T ' again in setmin, and judge Tlocal-Tbuild> Tmax-Tmin
It is whether true, aforesaid operations are repeated, meet T until findinglocal-Tbuild> Tmax-TminTmin；Wherein, TlocalIt is mobile whole
The current time at end, m are the integer less than n.
The operation that the determination unit 202 executes are as follows: calculate Delta Time TΔ=Tmax-Tmin, then determine mobile terminal
The time T of factory resetr=Tlocal-TΔ。
Referring to above-mentioned actual test, the present invention is by the extracting time information from the system file of the mobile terminal, so
The time for determining mobile terminal factory reset based on the temporal information afterwards, i.e., by dividing system file and log
Analysis determines the time that the last time mobile terminal is in active state, the remaining time after some dead times in eliminating system
In earliest time, and then the incremental time of system is determined, so that estimating terminal the last time carries out factory reset
Time, improve the accuracy of determining terminal factory reset operating time, the present invention can be used for helping detecing for case
Broken, evidence obtaining of evidence etc..
For convenience of description, it is divided into various units when description apparatus above with function to describe respectively.Certainly, implementing this
The function of each unit can be realized in the same or multiple software and or hardware when application.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can
It realizes by means of software and necessary general hardware platform.Based on this understanding, the technical solution essence of the application
On in other words the part that contributes to existing technology can be embodied in the form of software products, the computer software product
It can store in storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions are used so that a computer equipment
(can be personal computer, server or the network equipment etc.) executes the certain of each embodiment of the application or embodiment
Method described in part.
It should be noted last that: above embodiments only illustrate and not to limitation technical solution of the present invention, although reference
Above-described embodiment describes the invention in detail, those skilled in the art should understand that: it still can be to this hair
It is bright to be modified or replaced equivalently, it without departing from the spirit or scope of the invention, or any substitutions, should all
It is included within the scope of the claims of the present invention.
Claims (11)
1. a kind of method of determining mobile terminal factory reset time, which is characterized in that this method comprises:
Extraction step, the extracting time information from the system file of the mobile terminal；
It determines step, obtains maximum time information and minimum time information from the temporal information to determine that mobile terminal restores
The time of default setting.
2. the method according to claim 1, wherein the system of the mobile terminal is Android system, the shifting
Dynamic terminal is mobile phone, tablet computer, laptop or PDA.
3. according to the method described in claim 2, it is characterized in that, the operation of the extraction step are as follows:
Journal file under "/cache/recovery/ " catalogue of Android system is scanned for, is searched in journal file
The time T of ro.build.date.utc information determining system compilingbuild；
To the resource information file set F1 { F under "/data " catalogue in the file system of Android system1, F2...FnIn when
Between information be filtered and convert to obtain the time set T { T of a sequence1, T2...Tn}；
Determine Tmax, TmaxMaximum time in expression system, i.e., the time that the last mobile terminal is in active state,
In,
Tmax=fmax(T1, T2...Tn)；
Determine Tmin, TminMinimum time in expression system, as in eliminating system after some dead times in the remaining time
Earliest time；
Wherein, n indicates the number of file.
4. according to the method described in claim 3, it is characterized in that, determining TminMethod are as follows:
Judge whether there is " time/ " catalogue in resource information file set F1, if it is, the time of the resource of catalog is mobile phone
The time of system time, as T are set after factory resetmin；
Or
The time set T ' { T ' that the most time value of frequency of occurrence in time set T is filtered out to sort1, T '2...T′m,
From T ' taking-up minimum value Tmin=fmin(T′1, T '2...T′m), judge Tlocal-Tbuild> Tmax-TminIt is whether true, if so,
TminFor required value, if not, by the TminMinimum value T after obtaining the deletion after the middle deletion of T ' again in setmin, and sentence
Disconnected Tlocal-Tbuild> Tmax-TminIt is whether true, aforesaid operations are repeated, meet T until findinglocal-Tbuild> Tmax-Tmin's
Tmin；
Wherein, TlocalFor the current time of mobile terminal, m is the integer less than n.
5. according to the method described in claim 4, it is characterized in that, the operation of the determining step are as follows:
Calculate Delta Time TΔ=Tmax-Tmin, then determine the time T of mobile terminal factory resetr=Tlocal-TΔ。
6. a kind of device of determining mobile terminal factory reset time, which is characterized in that the device includes:
Extraction unit, for the extracting time information from the system file of the mobile terminal；
Determination unit, for obtaining maximum time information and minimum time information from the temporal information to determine mobile terminal
The time of factory reset.
7. device according to claim 6, which is characterized in that the system of the mobile terminal is Android system, the shifting
Dynamic terminal is mobile phone, tablet computer, laptop or PDA.
8. device according to claim 7, which is characterized in that the operation that the extraction unit executes are as follows:
Journal file under "/cache/recovery/ " catalogue of Android system is scanned for, is searched in journal file
The time T of ro.build.date.utc information determining system compilingbuild；
To the resource information file set F1 { F under "/data " catalogue in the file system of Android system1, F2...FnIn when
Between information be filtered and convert to obtain the time set T { T of a sequence1, T2...Tn}；
Determine Tmax, TmaxMaximum time in expression system, i.e., the time that the last mobile terminal is in active state,
In,
Tmax=fmax(T1, T2...Tn)；
Determine Tmin, TminMinimum time in expression system, as in eliminating system after some dead times in the remaining time
Earliest time；
Wherein, n indicates the number of file.
9. device according to claim 8, which is characterized in that determine TminMethod are as follows:
Judge whether there is " time/ " catalogue in resource information file set F1, if it is, the time of the resource of catalog is mobile phone
The time of system time, as T are set after factory resetmin；
Or
The time set T ' { T ' that the most time value of frequency of occurrence in time set T is filtered out to sort1, T '2...T′m,
From T ' taking-up minimum value Tmin=fmin(T′1, T '2...T′m), judge Tlocal-Tbuild> Tmax-TminIt is whether true, if so,
TminFor required value, if not, by the TminMinimum value T after obtaining the deletion after the middle deletion of T ' again in setmin, and sentence
Disconnected Tlocal-Tbuild> Tmax-TminIt is whether true, aforesaid operations are repeated, meet T until findinglocal-Tbuild> Tmax-Tmin's
Tmin；
Wherein, TlocalFor the current time of mobile terminal, m is the integer less than n.
10. device according to claim 9, which is characterized in that the operation that the determination unit executes are as follows:
Calculate Delta Time TΔ=Tmax-Tmin, then determine the time T of mobile terminal factory resetr=Tlocal-TΔ。
11. a kind of computer readable storage medium, which is characterized in that it is stored with computer program code on the storage medium,
When the computer program code is computer-executed, perform claim requires any method of 1-5.
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