CN102184372A - Reverse-sandbox-based mobilephone payment protection method - Google Patents
Reverse-sandbox-based mobilephone payment protection method Download PDFInfo
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Abstract
The invention provides a reverse-sandbox-based mobilephone payment protection method, comprising the following steps: 1. classifying application programs on the operating system of an Android mobile phone according to the file identification strategy; and 2. stopping non-trusted program and running a protection program on the basis of a reverse sandbox, and starting the non-trusted program after the protection program is running over. The invention further provides an encrypted file system, and all reading and writing of the protection program are redirected to the file system.
Description
Technical field
The present invention relates to the computer security technique field, more specifically, the present invention relates to a kind of mobile-phone payment guard method based on reverse sandbox.
Background technology
Continuous growth along with 3G subscription, the convenience of mobile phone mobile payment more and more develops rapidly, and have a high potential, this emerging shopping mode of mobile payment is not only the extension of shopping at network, more becomes one of symbol of city young crowd's fast pace life style.But a big bottleneck of mobile-phone payment is that the cellphone subscriber relates to the worry of payment transaction security for these.
For the cellphone subscriber, virus is ubiquitous problem, a kind of typical attack mode is the Email that sends the include file annex to undefended user, annex comprises malicious code, induce the user to enable this annex by Email, the entrained attack code of this annex will be revised cellphone subscriber's file or obtain these files.
Another kind is the application program viroid, when these application programs are carried out, revises user's file or catches confidential information entrained in these files.
For the process of exchange of mobile-phone payment, the control of the stage of its security mainly can be divided into: 1, the safety of server end, 2, the transmission security of transaction data, 3, the safety of mobile phone this locality.For 1 and 2, can use the safety technique of traditional network trading to solve the problem of security.But for 3, the safety of mobile phone this locality is neither one reliable solution then at present.
The safety of mobile phone this locality is meant the safety of user mobile phone end, and main security threat is: 1) keyboard is monitored, and rogue program obtains user's information such as bank cipher by the input of monitoring keyboard; 2) other application programs of unauthorized access is data cached, and malice is visited the local cache data of other application programs, thereby reaches the purpose of stealing customer transaction information.
Summary of the invention
For overcoming above-mentioned defective of the prior art, the present invention proposes a kind of mobile-phone payment guard method based on reverse sandbox.
According to an aspect of the present invention, proposed a kind of mobile-phone payment guard method, having comprised based on reverse sandbox: step 1, according to the file identification strategy application program on the Android mobile phone operating system is classified; Step 2 stops untrusted based on reverse sandbox and appoints program and running protection program, behind the defence program end of run, enables untrusted and appoints program.
According to another aspect of the application, a kind of mobile-phone payment guard method is provided, comprising: the file system of an encryption is provided, and all read-writes of defence program all are redirected to this document system.Wherein, also comprise: the storage that any read-write of this document system is all encrypted; Utilize the ptrace function to come this defence program of attach, intercept and capture the system call of all read and writes of this defence program; To the path of being revised as secure file system of calling in the path of actual file system, continue the operation of program.
By using the present invention, thereby realize the local security of application program of mobile phone, guarantee that this application program neither can be monitored by other application programs in operational process, and the data cached of application program can be protected also.
Description of drawings
Fig. 1 illustrates the operations according to the instant invention schematic flow sheet.
As shown in the figure, in order clearly to realize the structure or the method for embodiments of the invention, various sizes and block diagram have been marked in the drawings, but should only need by mark for signal, be not that intention limits the invention under this specific dimensions, according to concrete needs, those of ordinary skill in the art can be with these adjusted size, modification, and adjustment of being carried out and modification still are included in the scope of accompanying Claim.
Embodiment
Below in conjunction with the drawings and specific embodiments a kind of mobile-phone payment guard method based on reverse sandbox provided by the invention is described in detail.
" embodiment " who mentions in instructions or " embodiment " mean that special characteristic, structure or the characteristic described in conjunction with described embodiment are at least one embodiment of the present invention involved.Therefore, the phrase that appears at the diverse location in the whole instructions " " needs not to be and all points out among the present same embodiment in one embodiment.
Described below is that mode with mathematical algorithm or symbolic representation presents, and these arthmetic statements are means of being used by the technician, conveys to those skilled in the art with the effective and efficient manner essence of will working.In the following description, the feature of these embodiment, structure and logic can be included among other embodiment.
The invention provides and be some storage instructions or computing flow process, these instructions or flow process can be programmed on the portable terminal of mobile phone to carry out comprising.In other embodiments, these process steps can be useful on the specialized hardware of carrying out these steps to be formed, and perhaps carries out realization by electronic package.
Generally speaking, at these mentioned in background technology security threats, the application passes through to be set up " green channel " technology guarantees the safety of cell-phone customer terminal.The green channel technology that the application was referred to as comprises two safety techniques: 1) based on the technology of reverse sandbox, guarantee can not monitored by rogue program in the application program operational process; 2) An Quan local file system guarantees that other rogue programs can't reach the purpose of stealing user profile by reading the local cache data.
In the application's first embodiment, provide method for security protection based on the mobile-phone payment of reverse sandbox.Traditional sandbox technology is that the program that certain is monitored places the system environments of an isolation, and operation comprises the program of risk program in sandbox.The operation risk program has no effect to real system in sandbox.
The reverse sandbox technology that the present invention adopts, critical applications is placed on outside the sandbox, appoints program to place sandbox untrusted, these untrusteds appoint program to move in enclosed environment or out of service, can't enter kernel state by system call, also just can't access system resources.The critical applications of like this, moving (for example client of Mobile banking) then operates in the environment of a safety naturally.
The method of the application's first embodiment comprises: step 1, according to the file identification strategy application program on the Android mobile phone operating system is classified; Step 2 stops untrusted based on reverse sandbox and appoints program and running protection program, behind the defence program end of run, enables untrusted and appoints program.
Particularly, in step 1, the application program on the Android mobile phone operating system is classified according to the file identification strategy.In one embodiment, at first the program in the Android system is divided into the trusted program, untrusted is appointed program and defence program.
Wherein, the trusted program is meant the program that the user can trust, and is generally system program, as some system programs that carry on the Android cell phone system, and note for example, address list etc.;
Wherein, untrusted appoints program to be meant the fly-by-night program of user, typically refers to third party's program that the user installs voluntarily, as the recreation etc.;
Wherein, defence program is cellphone subscriber's key procedure that will move just, the program that need protect, for example client of Mobile banking.
In addition, this three class methods user can be configured voluntarily, can a trusted program be set to untrusted as the user and appoints program.
Particularly, in step 2, stop untrusted based on reverse sandbox and appoint program and running protection program, behind the defence program end of run, enable untrusted and appoint program.Wherein, in one embodiment, before user's running protection program, scan current all processes of moving,, appoint program, then stop this process to enter the kernel state of operating system if this process belongs to untrusted for each process.Because the process that stops untrusted to be appointed enters kernel state, the process that these untrusteds are appointed also just can't be visited the resource of any system.
For Android (Android) mobile phone operating system, can utilize and call ptrace () system function and realize stoping this process to enter the kernel state of operating system.Particularly, the process of appointing for each untrusted, call ptrace (PTRACE_ATTACH, pid ...) and come attach to go up process, .pid be the id of process, call then ptrace (PTRACE_SYSCALL, pid ...), then can be suspended when this process is carried out system call, can not enter the kernel state of operating system in next time.
Then, restart defence program (as the client of bank), having only defence program and program trusty can enter kernel state in this state existing, access system resources, thus guaranteed the safety of protected program.
After the user executed defence program, withdraws from defence program, reverse sandbox program allowed these processes to enter the kernel state of operating system each untrusted being appointed process send order.
Specific on the Android mobile phone, for the process that each untrusted is appointed, call ptrace (PTRACE_DETACH, pid ...) and come this process of detach, this process can enter kernel state.
The implementation procedure of step 2 is further described with program language:
A), current all programs moved of scanning, appoint program if this program belongs to untrusted, reverse sandbox program utilizes ptrace () system call attach to go up this process, and PTRACE_SYSCALL is set, and promptly stops this process before next system call;
B), then, reverse sandbox program start defence program makes and has only defence program and program trusty can enter kernel state, access system resources;
C), after the user executes defence program; reverse sandbox program is appointing the process of program to send the order of PTRACE_CONT to each untrusted; allow these processes to carry out; reverse then sandbox program is sent the order of PTRACE_DETACH; these processes of detach, these programs can continue to run until in the kernel.
In another embodiment of the present invention, this technology is handled at kernel state, particularly, loads a module in kernel, and this module is revised subsystem call table, changes the subsystem call table of oneself into.
When kernel carried out system call at every turn, whether the caller of checking this system call was in credible program listing, or defence program.Trusted program or defence program then allow to call in this way; If not, then directly return, do not allow to call.
But the kernel version of each Android mobile phone is too many, and the mechanism of module verification is arranged on the Linux simultaneously, causes the versatility of this solution too poor, also is not so good as the reverse sandbox technology of the process attitude among first embodiment on the operational efficiency.
In the application's the 3rd embodiment, a kind of document handling method of mobile phone end is provided, this method provides the file system of an encryption, and all read-writes of defence program all are redirected to this document system.
The method of the application the 3rd embodiment comprises: step 1, safeguard a virtual secure file system, the storage that any read-write of this document system is all encrypted; Step 2 utilizes the ptrace function to come this defence program of attach, intercepts and captures the system call of all read and writes of this defence program; Step 3, first parameter of system call this moment is the path of actual file system, the operation of program is continued in the path that function is revised as secure file system dynamically with this constant then.
Like this, defence program has just write secure file system with it, because this secure file system process is encrypted storage, thereby makes the data cached of third party application be protected.The developer of defence program need not consider the existence of secure file system and carry out extra processing in addition, thereby has alleviated developer's burden.
Further, the 3rd embodiment can also on the basis of this document system, provide new mobile-phone payment guard method with the combination in addition of the processing mode among first embodiment, this method comprises: step 1, according to the file identification strategy application program on the Android mobile phone operating system is classified; Step 2 stops untrusted based on reverse sandbox and appoints program and running protection program, behind the defence program end of run, enables untrusted and appoints program.
With the program in the Android system be divided into the trusted program, untrusted is appointed program and defence program, the trusted program is meant the program such as the users to trust of system program; Untrusted appoints program to be meant third party's program that the user installs voluntarily; Defence program is the key procedure such as the mobile-phone payment client that the cellphone subscriber will move.
For the processing procedure of above-mentioned steps 1 and 2, can repeat no more with reference to flow process and the parameter of first embodiment herein.
In the 4th embodiment according to the application, first embodiment and the 3rd embodiment can be carried out organically combination of another kind, it is a kind of mobile-phone payment guard method based on reverse sandbox that wherein a kind of mode provides, comprise: step 1, according to the file identification strategy application program on the Android mobile phone operating system is classified; Step 2 stops untrusted based on reverse sandbox and appoints program and running protection program, behind the defence program end of run, enables untrusted and appoints program; The file system of an encryption is provided in the method, and all read-writes of defence program all are redirected to this document system, the storage that any read-write of this document system is all encrypted; Utilize the ptrace function to come this defence program of attach, intercept and capture the system call of all read and writes of this defence program; To the path of being revised as secure file system of calling in the path of actual file system, continue the operation of program.
Particularly, in embodiment 4, the detailed description of step 1 and 2 can be repeated no more with reference to first embodiment and the 3rd embodiment herein.
It should be noted that at last, above embodiment is only in order to describe technical scheme of the present invention rather than the present technique method is limited, the present invention can extend to other modification, variation, application and embodiment on using, and therefore thinks that all such modifications, variation, application, embodiment are in spirit of the present invention and teachings.
Claims (10)
1. mobile-phone payment guard method based on reverse sandbox comprises:
Step 1 is classified the application program on the Android mobile phone operating system according to the file identification strategy;
Step 2 stops untrusted based on reverse sandbox and appoints program and running protection program, behind the defence program end of run, enables untrusted and appoints program.
2. the described method of claim 1 wherein, also comprises: the file system of an encryption is provided, and all read-writes of defence program all are redirected to this document system.
3. the described method of claim 2 wherein, also comprises: the storage that any read-write of this document system is all encrypted; Utilize the ptrace function to come this defence program of attach, intercept and capture the system call of all read and writes of this defence program; To the path of being revised as secure file system of calling in the path of actual file system, continue the operation of program.
4. the described method of claim 1, wherein, in the step 1, with the program in the Android system be divided into the trusted program, untrusted is appointed program and defence program.
5. the described method of claim 4, wherein, in step 1, wherein, the trusted program is meant the program such as the users to trust of system program; Untrusted appoints program to be meant third party's program that the user installs voluntarily; Defence program is the key procedure such as the mobile-phone payment client that the cellphone subscriber will move.
6. the described method of claim 4, wherein, in the step 1, the user can dispose the trusted program voluntarily, untrusted is appointed program and defence program.
7. the described method of claim 1 wherein, in the step 2, before user's running protection program, scans current all processes of moving, for each process, appoints program if this process belongs to untrusted, then stops this process to enter the kernel state of operating system.
8. the described method of claim 7, wherein, in the step 2, for the Android mobile phone operating system, utilization is called ptrace () system function and is realized stoping this process to enter the kernel state of operating system, the process of appointing for each untrusted, call ptrace (PTRACE_ATTACH, pid ...) and come this process of attach, .pid be the id of process, call then ptrace (PTRACE_SYSCALL, pid ...), then can be suspended when this process is carried out system call, can not enter the kernel state of operating system in next time.
9. the described method of claim 8 wherein, in the step 2, starts defence program then, enters kernel state, access system resources.
10. the described method of claim 1, wherein, step 2 comprises:
Scan current all programs of moving, appoint program, utilize ptrace () system call attach to go up this process, and PTRACE_SYSCALL is set, before next system call, stop this process if this program belongs to untrusted;
Start defence program;
After the user executes defence program, appointing the process of program to send the order of PTRACE_CONT to each untrusted, allow these processes to carry out; Send the order of PTRACE_DETACH then, these processes of detach.
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| CN102665208A (en) * | 2012-04-06 | 2012-09-12 | 中国工商银行股份有限公司 | Mobile terminal, terminal banking business security certification method, and terminal banking business security certification system |
| CN103377055A (en) * | 2012-04-17 | 2013-10-30 | 腾讯科技（深圳）有限公司 | Method and device for program running in mobile terminal |
| CN103778384A (en) * | 2014-02-24 | 2014-05-07 | 北京明朝万达科技有限公司 | Identity authentication based virtual terminal safety environment protection method and system |
| CN104468997A (en) * | 2014-12-01 | 2015-03-25 | 深圳市中兴移动通信有限公司 | Encrypted state processing method and device |
| CN105577375A (en) * | 2014-10-11 | 2016-05-11 | 腾讯科技（深圳）有限公司 | Identity authentication method and device |
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| CN104361281B (en) * | 2014-11-17 | 2017-06-09 | 西安电子科技大学 | A kind of solution of Android platform phishing attack |
| CN104468997B (en) * | 2014-12-01 | 2017-09-19 | 努比亚技术有限公司 | Encrypted state processing method and processing device |
| CN104468997A (en) * | 2014-12-01 | 2015-03-25 | 深圳市中兴移动通信有限公司 | Encrypted state processing method and device |
| CN106982428A (en) * | 2016-01-18 | 2017-07-25 | 中国移动通信集团公司 | A kind of security configuration method, safety control and security configuration device |
| CN106982428B (en) * | 2016-01-18 | 2020-08-18 | 中国移动通信集团公司 | Security configuration method, security control device and security configuration device |
| CN105678165A (en) * | 2016-01-29 | 2016-06-15 | 博雅网信(北京)科技有限公司 | Sandboxing keyboard system of mobile terminal and data transmitting method of sandboxing keyboard system |
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| CN107330324A (en) * | 2017-05-18 | 2017-11-07 | 深信服科技股份有限公司 | The method for deleting and erasing apparatus of a kind of application data |
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