CN102254124B - A kind of information of mobile terminal security protection system and method - Google Patents
A kind of information of mobile terminal security protection system and method Download PDFInfo
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- CN102254124B CN102254124B CN201110204543.1A CN201110204543A CN102254124B CN 102254124 B CN102254124 B CN 102254124B CN 201110204543 A CN201110204543 A CN 201110204543A CN 102254124 B CN102254124 B CN 102254124B
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Abstract
The invention provides a kind of information of mobile terminal security protection system and method.The system includes interface module, security strategy setting module, file access control module, file access logger module and dynamic encryption and decryption module.The interface module provides api interface to call.The instruction that security strategy setting module can be transmitted according to interface module, sets corresponding security strategy.File access control module realizes that the access operation to the file object in mobile terminal is controlled.File access logger module realizes that all operations to file are recorded.Dynamic encryption and decryption module is located at the inner nuclear layer of Mobile operating system, is realized according to the security strategy of setting and the encryption and decryption of file is handled.System and method of the present invention, can provide encryption protection to the mobile terminal application using file as information storage means, protect comprehensive, strong, safe scalability, system resource occupancy, Consumer's Experience good.
Description
Technical field
The present invention relates to a kind of information of mobile terminal security protection system and method, based on Mobile operating system kernel level
Dynamic encryption and decryption technology, can be achieved that protection is encrypted to the various applications of mobile terminal, to avoid storing in the terminal
Information leakage.
Abbreviation and explanation of nouns：
API：Application programming interfaces
PIN：Full name Personal Identification Number, be exactly mobile terminal SIM card individual identification it is close
Code.
SD card：Full name Secure Digital Memory Card, translator of Chinese is safe digital card, is a kind of be based on partly
The storage device of conductor fast-flash memory device, it on mancarried device by widely in using, such as mobile phone, digital camera.
Background technology
With the continuous popularization of intelligent mobile terminal (including smart mobile phone and tablet personal computer), mobile terminal was from the past
Simple person-to-person communication instrument is changed into personal synthetic information processing center.Be stored with a large amount of personal secrets and enterprise in mobile terminal
Industry/tissue secret, such as short message, address list, message registration, Email, Mobile banking, mobile phone speculation in stocks, multimedia (photo and are regarded
Frequently), office documents etc..The portability of mobile terminal is being brought outside the facility used simultaneously, also brings loss, stolen etc. huge
Risk.
Existing mobile terminal, using the teaching of the invention it is possible to provide the function of screen protection password in PIN code or similar computer, it can
Illegal user is set to cannot be introduced into intelligent terminal.But the memory capacity that mobile terminal needs at present is increasing, and the machine is carried
The memory space of confession is very limited, and most information is stored in SD card.If the mobile terminal of user is lost or stolen,
As long as illegal user takes out SD card, with regard to that can read the content in SD card in other equipment, now, the salvo such as PIN code
It is completely ineffective.
Existing mobile phone safe software, is all based on the application layer realization of Mobile operating system.There are the following problems：
1st, such as an application is protected, it is necessary to develop a single application program.It is most of at present
Mobile phone safe software only realizes the protection of divulging a secret to short message and message registration.That protects is comprehensive far from enough.
2nd, the application of mobile terminal is maked rapid progress, and the IPHONE mobile phones of apple have had 150,000 kinds in recent years
Using.Existing pattern, its autgmentability does not catch up with the development speed of mobile terminal application much.
3rd, the technology based on application layer, due to being limited to clear data in the processing response time of operating system, system
The general 0.5s-2s of existence time.This period is exactly the dangerous time, there is the risk divulged a secret.
4th, the technology based on application layer is, it is necessary to which user uses the new application program for possessing function of safety protection.If desired for
Short message is protected, user is accomplished by the short message application for abandoning being accustomed to originally, use the short message application for possessing safeguard function instead, used
Family experience is bad.
5th, the technology based on application layer, occupying system resources are high.
The content of the invention
The invention provides a kind of information of mobile terminal security protection system and method, based on Mobile operating system kernel level
Dynamic encryption and decryption technology, the operated file of the application to all mobile terminals can be achieved protection is encrypted, to protect comprehensively
Protect the information security of mobile terminal.
Information of mobile terminal security protection system of the present invention, can be to existing all storage shapes by information of file
Protection, and the application increased newly to future is encrypted in the application of the mobile terminal of formula, need to only make adaptation in security strategy and adjust
It is whole, you can easily to support newly-increased application, protection is comprehensively and scalability is strong；No matter file be stored in mobile terminal the machine or
The SD card of extension, can carry out full protection；The system and method are deployed in Mobile operating system kernel level, and the response time is milli
Second rank, the hidden danger almost without plaintext existence time；System takes the resource also only 1/2-1/3 of tradition application layer technology；
The application protected using system and method for the present invention, user can be continuing with original application, not change using habit
Used, Consumer's Experience is good.
Fig. 1 is information of mobile terminal security protection system of the present invention, is set including interface module, security strategy
Cover half block, file access control module, file access logger module and dynamic encryption and decryption module.
Interface module provides api interface.Api interface is called by upper layer application, is transmitted data, instruction by interface module
Security strategy setting module to lower floor.Interface module can query safe strategy setting module, file access control module, file
The state of access log logging modle and dynamic encryption and decryption module simultaneously reports application.
The instruction that security strategy setting module can be transmitted according to interface module, sets corresponding security strategy, including safety
The object of protection and the form of safeguard protection.And according to the description of security strategy, to file access control module, file access day
Will logging modle and dynamic encryption and decryption module send instruction.And inquire about file access control module, file access log recording mould
The state of block and dynamic encryption and decryption module simultaneously reports interface module.
File access control module is realized in mobile terminal by receiving the instruction that security strategy setting module is sent
The access operation of file object is controlled.Wherein file object, can be some specified file or one group of file or catalogue.
Wherein access operation include to the opening of file object, create, delete, rename, replicate, move, preserve, attribute setting operation.
File access control module, which carries out control of authority to file and catalogue, to include read-only, hiding, deletion disabled, forbids opening, forbids
Copy, forbid unauthorized applications to access a file opened by valid application program.
File access logger module realizes the institute to file by receiving the instruction that security strategy setting module is sent
There is operation to be recorded.
Dynamic encryption and decryption module is located at the inner nuclear layer of Mobile operating system, is sent by receiving security strategy setting module
Instruction, realizes and the encryption and decryption of file is handled.When valid application program reads encrypted data, dynamic encryption and decryption module is entered
Row decryption oprerations, valid application program then can normally use data；When valid application program carries out write operation to file, dynamic
Operation is encrypted in encryption/decryption module, and the file that valid application program is preserved is the file after encryption；When unauthorized applications are read
When taking encrypted data, dynamic encryption and decryption module is without decryption oprerations, and unauthorized applications then can not normally use data；
When unauthorized applications carry out write operation to file, dynamic encryption and decryption module is operated without encryption and decryption.
The present invention also provides a kind of method of information of mobile terminal security protection, and it uses mobile terminal of the present invention
Information Security Defending System, the api interface that can be provided by calling interface module transmits the instruction and data of safeguard protection,
The instruction of safeguard protection can be transmitted to security strategy setting module by interface module；Security strategy setting module is according to the finger received
Order and data, set security strategy, and according to the description of security strategy, remember to file access control module, file access daily record
Record module and dynamic encryption and decryption module sends instruction；File access control module is receiving the instruction of security strategy setting module
Afterwards, according to the requirement of security strategy, all operations of file object on mobile terminal are monitored in real time, and are controlled；File is visited
Logger module is asked after the instruction of security strategy setting module is received, according to the requirement of security strategy, monitoring movement in real time
All operations of file object in terminal, and carry out log recording；Dynamic encryption and decryption module is receiving security strategy setting module
Instruction after, according to the requirement of security strategy, in real time on monitoring mobile terminal file object read-write operation, and carry out encryption and decryption
Operation.
Embodiment：
Illustrate the application of the present invention by taking Anroid smart mobile phones as an example.
Android system is divided into four levels：Applications (application layer), Application Frameworks
(application framework layer), Libraries and Android Runtime (class libraries and real time execution storehouse layer), Linux Kernel
(Linux inner core).
1st, Applications (application layer)
Android will pre-install one group of core application, including email clients, short message service, calendar schedule, map
Service, browser, contact person and other applications.All application programs are all that Java programming languages are write.
In application layer, it is all can be by calling interface module of the present invention come the application of storage information based on file
The API of offer realizes that the file operated to application carries out dynamic encryption and decryption protection.
2nd, Application Frameworks (application framework layer)
The original intention of this layer of Anroid system designs is：Simplified assembly is multiplexed mechanism；Any application can issue the work(of oneself
Can, these functions can be used by any other application and (to be forced constraining for safety standard by from framework certainly) again.With
Multiplexing mechanism is identical, and framework allows the replacing of component.
Interface module of the present invention is called positioned at the layer there is provided API for upper layer application.
3rd, Libraries and Android Runtime (class libraries and real time execution storehouse layer)
Android includes a set of C/C++ storehouses, and the various components of android system are all being used.These functions pass through
Android application frameworks are to developer.
Security strategy setting module of the present invention, file access control module, file access logger module are equal
Positioned at the layer.
File access control module and file access logger module use Hook system method of calling, pass through change
Operating system workflow, realizes the access control and log recording to file.File access control module and file access day
The system of the specific Hook operating systems of will logging modle is called：Open, Read, Write, Delete and Move, file access control
Molding block continues by the way that whether logic judgment allows file access operation or blocks system to call, file access log recording mould
Block then carries out log recording when allowing file access operation.File access control module and file access logger module are hung
The method of hook is redirected using ripe kernel inline hook technologies by writing the instruction such as jmp or push ret
Into new kernel function, so as to reach the function of modification or filtering.
Security strategy setting module is the interface module and file access control module, text that standalone module is used to connect upper strata
Part access log logging modle and the dynamic encryption and decryption module of lower floor.Security policy module is receiving peace from interface module
After full strategy, security strategy is parsed, and according to file access control module, file access logger module, with
And the interface definition of the dynamic encryption and decryption module of lower floor, assembling instructs and is sent to file access control module, file access day
Will logging modle and the dynamic encryption and decryption module of lower floor.
4th, Linux Kernel (Linux inner core)
Android relies on Linux 2.6 editions, and there is provided core system service：Safety, memory management, management of process, network
Group, driving model.Kernel portion also corresponds to a level of abstraction in hardware layer and system between other software group
It is secondary.
Dynamic encryption and decryption module of the present invention is located at the layer.The realization of dynamic encryption and decryption module is mainly by rewriting
Read the and write kernel functions of Android operation system, obtain the process title of current operation and current in read functions
The information of file object, carries out logic judgment, for meeting the requirement described in security strategy, then according to the description of security strategy
Operation is decrypted, finally the data after decryption are returned to, for not meeting security strategy description, then without any behaviour
Make, returned by original read function logics；Similarly, cryptographic operation is realized in write kernel functions.
Moreover, it is achieved that system of the present invention is it is important that the setting of security strategy：
1. security policy specification
Security strategy includes following items content：
1) safe class is set
To meet various clients to different demands for security, safe class has three-level：Core is close, secret, secret.
2) AES is set
Different AESs, such as DES, 3DES, AES, RC4 etc. can be set by application program.
3) cipher key setting
Different keys can be set by application program, the key of any length can be set.
4) associated program is set
In order to realize that vertical application is decrypted, so as to set special reading program, obtaining the application program that authorizes can be with
Normal to read file, driving can be its transparent encryption and decryption, and can only read ciphertext for unauthorized application program, it is impossible to just
Often read and use file.
5) strategy switch
Setting whether application strategy, or be whether to allow that specific file operation passes through (PASS) filter layer.
6) policy content is set
Set strategy detailed content, such as specific file type (can use asterisk wildcard *,), specific file mesh
Record.Policy content can specify any logic sector such as：@：* .*, the exactly All Files under mobile storage is all
Encrypting storing.Including following content：
@：-- represent mobile storage.
F：-- daily record switch setting, setting whether log.
G：-- access rights property control sets the file access control attribute of policy content defined, including：
READONLY、HIDDEN、NODELETE、NOOPEN、NOCOPY…。
Brief description of the drawings
Fig. 1 is information of mobile terminal security protection system schematic diagram of the present invention.
Claims (6)
1. a kind of information of mobile terminal security protection system, it is characterised in that the system operation on Mobile operating system, including
Interface module, security strategy setting module, file access control module, file access logger module and dynamic encryption and decryption mould
Block；Wherein：
A, interface module provide api interface, and data, instruction are passed to the security strategy setting module of lower floor, and interface module is used
In query safe strategy setting module, file access control module, file access logger module and dynamic encryption and decryption module
State and report；
The instruction that B, security strategy setting module can be transmitted according to interface module, sets security strategy；And according to security strategy
Description, sends to file access control module, file access logger module and dynamic encryption and decryption module and instructs；And inquire about text
Part access control module, the state of file access logger module and dynamic encryption and decryption module simultaneously report interface module；
C, file access control module are realized to file in mobile terminal by receiving the instruction that security strategy setting module is sent
The access operation of object carries out control of authority；
D, file access logger module own by receiving the instruction that security strategy setting module is sent, realization to file
Operation is recorded；
E, dynamic encryption and decryption module are located at the inner nuclear layer of Mobile operating system, by receiving the finger that security strategy setting module is sent
Order, automatic realize is handled the encryption and decryption of file；
The dynamic encryption and decryption module realizes that the method for automatic encryption and decryption is, when valid application program reads encrypted data
When, operation is decrypted in dynamic encryption and decryption module, and valid application program then can normally use data；When valid application program is to text
When part carries out write operation, operation is encrypted in dynamic encryption and decryption module, and the file that valid application program is preserved is the text after encryption
Part；When unauthorized applications read encrypted data, dynamic encryption and decryption module is without decryption oprerations, unauthorized applications
It then can not normally use data；When unauthorized applications carry out write operation to file, dynamic encryption and decryption module is without adding solution
Close operation.
2. a kind of information of mobile terminal security protection system as claimed in claim 1, it is characterised in that security strategy sets mould
The security strategy of block setting includes the object of safeguard protection and the mode of safeguard protection.
3. a kind of information of mobile terminal security protection system as claimed in claim 1, it is characterised in that described file access
The file object that control module is controlled, is specified file or one group of file or catalogue.
4. a kind of information of mobile terminal security protection system as claimed in claim 1, it is characterised in that the file access control
The access operation that molding block is carried out includes to the opening of file object, creates, deletes, renames, replicates, moves, preserves or attribute
Operation is set.
5. a kind of information of mobile terminal security protection system as claimed in claim 1, it is characterised in that the file access
The control of authority that control module is carried out, including read-only, hiding, deletion disabled, forbid opening, forbid copying or forbid illegal application
The file that routine access one has been opened by valid application program.
6. a kind of information of mobile terminal safety protecting method, it is characterised in that using the mobile terminal letter described in claim 1-5
Security protection system is ceased, the api interface that can be provided by calling interface module transmits the instruction and data of safeguard protection, connect
The instruction of safeguard protection can be transmitted to security strategy setting module by mouth mold block；Security strategy setting module is according to the instruction received
And data, security strategy is set, and according to the description of security strategy, to file access control module, file access log recording
Module and dynamic encryption and decryption module send instruction；File access control module receive security strategy setting module instruction after,
According to the requirement of security strategy, all operations of file object on mobile terminal are monitored in real time, and are controlled；File access day
Will logging modle, according to the requirement of security strategy, monitors mobile terminal in real time after the instruction of security strategy setting module is received
All operations of upper file object, and carry out log recording；Dynamic encryption and decryption module is receiving the finger of security strategy setting module
After order, according to the requirement of security strategy, the read-write operation of file object on mobile terminal is monitored in real time, and carry out encryption and decryption behaviour
Make.
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| CN201110204543.1A CN102254124B (en) | 2011-07-21 | 2011-07-21 | A kind of information of mobile terminal security protection system and method |
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| CN201110204543.1A CN102254124B (en) | 2011-07-21 | 2011-07-21 | A kind of information of mobile terminal security protection system and method |
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| CN102254124B true CN102254124B (en) | 2017-10-13 |
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