CN106255094B - SIM card application locking method and device, SIM card and system - Google Patents
SIM card application locking method and device, SIM card and system Download PDFInfo
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- CN106255094B CN106255094B CN201510324216.8A CN201510324216A CN106255094B CN 106255094 B CN106255094 B CN 106255094B CN 201510324216 A CN201510324216 A CN 201510324216A CN 106255094 B CN106255094 B CN 106255094B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
- H04W8/183—Processing at user equipment or user record carrier
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/06—Authentication
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Abstract
The invention discloses a locking method and a locking device for SIM card application, an SIM card and a system, wherein the method comprises the following steps: acquiring an instruction of a target application in the SIM card, which is called by an external entity; and calling a counter service module in the SIM card according to the instruction so as to lock the target application when the counter service module judges that the target instruction called in the target application meets the trigger condition of target application locking. According to the method and the device, the target instructions of the card application of the counter service module are detected and counted, when the calling times of the target instructions meet the locking condition of the target application, the counter server module is triggered to lock the target application of the SIM card, the application safety can be improved without changing the existing application specification, the locking protection is started when the SIM card application is maliciously attacked, and the application safety is improved.
Description
Technical Field
The invention relates to the field of SIM card application and application security, in particular to a locking method and device of SIM card application, an SIM card and a system.
Background
With the popularization of SIM card applications, the security of the applications is more and more emphasized by users and developers, and in order to ensure the secure use of the card applications, the following two methods are often adopted in the prior art for security authentication:
the first method is as follows: as shown in fig. 1 (taking GSM network environment as an example, the authentication process of the mobile phone terminal logging in the network by using the SIM card), the mobile phone terminal SELECTs the SIM application by selecting the command SELECT; the mobile phone terminal sends an authentication instruction AUTHENTICATE command to the SIM card for authentication, and the command message comprises a random number RAND; after receiving the command message, the SIM card calculates RES and Kc; and after receiving the RES, the network checks whether the RES is correct. However, although the validity of the SIM card is verified, the SIM card does not verify the validity of the network side, i.e. only the network side performs one-way authentication on the SIM card, so that an attacker can continuously send authentication requests to the SIM card to find vulnerabilities of the SIM card, thereby realizing attacks on applications.
The second method comprises the following steps: an SCP 02 Security channel protocol is defined in the Global Platform card specification, so that bidirectional authentication between the card and an external entity can be realized, a Security channel establishment flow is shown in fig. 2, and a mobile phone terminal SELECTs a main Security Domain (ISD) on the UICC card through a SELECT command; a network side management background generates a random number RAND1, and sends an initialization instruction initialization UPDATE command (including RAND1) to the UICC card through a mobile phone terminal; after the UICC receives the command message, a random number RAND2 is generated, a session key is generated together with RAND1, and MAC1 is calculated; the UICC card returns RAND2 and MAC 1; the network side manages the background to check the MAC1, if the MAC passes the check, the MAC2 is generated, and the MAC is sent to the UICC card through an external authentication instruction EXTENTALICATE command; the UICC card checks the MAC2 after it is received. Although the authentication process adopts bidirectional authentication, the technical defects still exist: after receiving the RAND2 and the MAC1 sent by the UICC, an attacker does not send an EXTERNAL authencate command to the UICC card, but continues to repeatedly send an INITIALIZE UPDATE command, thereby achieving the purpose of attacking card applications.
For the security problem of SIM card application, although two methods for improving application security through authentication are proposed above, the security of card application cannot be guaranteed due to defects in the authentication process.
Disclosure of Invention
In order to solve the technical problem, the invention provides a locking method, a locking device, an SIM card and a system for SIM card application, which solve the problem that the security of the card application in the prior art can not be ensured.
According to an aspect of the present invention, there is provided a method for locking a SIM card application, including:
acquiring an instruction of a target application in the SIM card, which is called by an external entity;
and calling a counter service module in the SIM card according to the instruction so as to lock the target application when the counter service module judges that the target instruction called in the target application meets the trigger condition of target application locking.
The step of obtaining the instruction of the target application in the SIM card, which is called by the external entity, comprises the following steps:
and acquiring a selection instruction of the target application in the SIM card, which is called by an external entity.
The method comprises the following steps of calling a counter service module in the SIM card according to an instruction so that when the counter service module judges that a target instruction called in a target application meets a trigger condition for locking the target application, the step of locking the target application comprises the following steps:
detecting whether the current state of the target application is in a locked state or not according to the instruction;
if the target application is not in the locking state, a counter service module in the SIM card is called, so that the target application is locked when the counter service module judges that the instruction meets the trigger condition of target application locking.
When the counter service module judges that a target instruction called in the target application meets a trigger condition for locking the target application, the step of locking the target application comprises the following steps:
the counter service module judges whether the calling times of the target instructions called in the target application reach the preset maximum value of the counter or not;
if so, the target application is locked and a response is generated to lock the target application.
When the counter service module judges that the target instruction called in the target application meets the trigger condition of target application locking, the step of locking the target application further comprises the following steps:
the counter service module judges whether the calling times of the target instructions called in the target application reach the alarm value of the counter or not; wherein the alarm value is less than or equal to the preset maximum value of the counter;
if the alarm is reached, alarm information is generated.
The locking method of the SIM card application further comprises the following steps: and the counter service module synchronizes the counting information of the counter to the counter platform or the service platform.
According to still another aspect of the present invention, there is also provided a locking apparatus for a SIM card application, including:
the acquisition module is used for acquiring an instruction of a target application in the SIM card, which is called by an external entity;
and the processing module is used for calling the counter service module in the SIM card according to the instruction so as to lock the target application when the counter service module judges that the target instruction called in the target application meets the trigger condition of target application locking.
Wherein, the acquisition module includes:
and the selection unit is used for acquiring a selection instruction of the target application in the SIM card, which is called by an external entity.
Wherein, processing module includes:
the detection unit is used for detecting whether the current state of the target application is in a locked state or not according to the instruction;
and the processing unit is used for calling the counter service module in the SIM card if the target application is not in the locking state, so that the target application is locked when the counter service module judges that the instruction meets the trigger condition of locking the target application.
Wherein, the processing unit includes:
the first judgment subunit is used for enabling the counter service module to judge whether the initiation frequency of the target instruction called in the target application reaches the preset maximum value of the counter or not;
and the locking subunit is used for locking the target application when the calling times of the target instruction reach the maximum value, and generating a response for locking the target application.
Wherein, the processing unit further comprises:
the second judgment subunit is used for enabling the counter service module to judge whether the initiation frequency of the target instruction called in the target application reaches the alarm value of the counter or not; wherein the alarm value is less than or equal to the preset maximum value of the counter;
and the alarm subunit is used for generating alarm information when the calling times of the target instruction reach an alarm value.
Wherein, the locking device of the SIM card application further comprises: and the synchronization module is used for enabling the counter service module to synchronize the counting information of the counter to the counter platform or the service platform.
According to still another aspect of the present invention, there is also provided a SIM card including the locking device for SIM card application as described above, and a SIM card application module and a counter service module.
According to yet another aspect of the present invention, there is also provided a system comprising a SIM card as described above, an external entity cooperating with the SIM card, and a service platform and a counter platform connected to the SIM card.
The embodiment of the invention has the beneficial effects that: a target instruction of a card application of a counter service module is detected and counted, when the calling times of the target instruction meet the locking condition of the target application, a counter server module is triggered to lock the target application of the SIM card, the application safety can be improved without changing the existing application specification through the method, and locking protection is started when the SIM card application is maliciously attacked, so that the application safety is improved.
Drawings
Fig. 1 shows a flow chart of authentication of a SIM card in the prior art;
fig. 2 is a flow chart illustrating a process of establishing a secure channel between a SIM card and a service platform in the prior art;
fig. 3 shows a flow chart of a locking method of the SIM card application of the present invention;
fig. 4 shows a block schematic diagram of a locking device for SIM card applications of the present invention;
FIG. 5 is a block diagram of the system of the present invention;
figure 6 shows a flow chart of the system of the present invention.
Wherein in the figure: 101. an acquisition module 201 and a processing module.
Detailed Description
Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
Examples
With the popularization of SIM card applications, the importance of application security is increasing, especially for some applications with higher security requirements, such as: cell phone banks, etc. In order to ensure the security of the SIM card application, an embodiment of the present invention provides a method for locking an SIM card application, which specifically includes the steps shown in fig. 3:
step 10: and acquiring an instruction of a target application in the SIM card, which is called by an external entity.
Here, when it is necessary to initiate access of a certain target application, the external entity needs to initiate a call instruction of the target application to the SIM card.
Step 20: and calling a counter service module in the SIM card according to the instruction so as to lock the target application when the counter service module judges that the target instruction called in the target application meets the trigger condition of target application locking.
After a certain target application is called, a technical device service module in the SIM card is called according to a calling instruction so as to count the calling times of the certain target instruction of the target application, and when the calling times of the target instruction reach a locking triggering condition, the corresponding target application is locked.
Further, the instruction mentioned in step 10 above refers to a selection instruction, that is, when initiating the access of a certain target application, an external entity is required to send a selection instruction to the SIM card to select the target application.
After the target application is selected, the target application needs to be detected in real time to determine whether the target application is in a dangerous state. Specifically, the detection process can be implemented by specifically referring to the following steps:
and detecting whether the current state of the target application is in a locked state or not according to the instruction.
If the target application is not in the locking state, a counter service module in the SIM card is called, so that the target application is locked when the counter service module judges that the instruction meets the trigger condition of target application locking.
After a specific target application is selected, first, whether the current state of the target application is a locked state is detected, and if the current state of the target application is the locked state, the request of the target application cannot be responded; if the target application is in an unlocked state, a counting service for the target application is called, and whether a locking triggering condition is met or not is detected.
The detection of the target application can be performed according to the following modes: a counter service module in the SIM card judges whether the calling frequency of a target instruction called in the target application reaches a preset maximum value of a counter or not; if so, the target application is locked and a response is generated to lock the target application.
Further, for the detection of the target application, the counter service module can also be detected to judge whether the calling frequency of the target instruction called in the target application reaches the alarm value of the counter or not; wherein the alarm value is less than or equal to the preset maximum value of the counter; if the alarm is reached, alarm information is generated.
The locking method of the SIM card application further comprises the following steps: and the counter service module synchronizes the counting information of the counter to the counter platform or the service platform. That is to say, under the networking condition, the SIM card reports the locking state or the alarm state of its own application to the counter platform or the service platform, so that the network side better deploys the SIM card application.
According to the embodiment of the invention, the target instruction of the card application of the counter service module is detected and counted, and when the calling times of the target instruction meet the locking condition of the target application, the counter server module is triggered to lock the target application of the SIM card.
Since the device of the current application specification is already deployed and matured, if the cost of upgrading the existing application specification or modifying the current interface is high, neither the detection process nor the invocation process mentioned above relates to the change of the existing standard, and only the self-defined tag reserved in the existing standard specification needs to be defined, for example, the technical mechanism and parameters of card application installation are defined in the GP specification, in order to implement the method, parameters such as 'a 0', 'a 1', 'a 2', or 'A3' may be defined under the 'C9' tag of the GP specification, and the tags and definitions of the specific parameters may refer to the following table, it is worth pointing out that, in the embodiment of the present invention, only the following definition mode is listed, and other additions to the reserved tags in the existing specification that can improve the application security can be applied to the embodiment of the present invention:
wherein, 'a 0' represents an alarm value, and when the number of calls of a target instruction of a target application reaches the alarm value, the counter service module in the SIM card generates an alarm message indicating that the target application may be in a dangerous state.
'a 1' indicates the maximum value, when the number of calls of a target instruction of a target application reaches the maximum value, the counter service module in the SIM card locks the target application.
'A2' indicates whether the alarm mechanism is enabled, and is used together with the parameter 'A0', when the 'A2' indicates that the alarm mechanism is enabled, the counter service module in the SIM card generates an alarm message when the calling times of a target instruction of a target application reach the alarm value.
'A3' indicates whether the application locking mechanism is enabled, and is used together with the parameter 'A1', when the 'A3' indicates that the application locking mechanism is enabled, the counter service module in the SIM card locks a target application when the number of calls of a target instruction of the target application reaches the maximum value.
When a target Application sets relevant parameters of a counter ('a 0', 'a 1', or 'A3', etc.) during installation, when a counter service module is called, the following relevant newly defined Application Programming Interfaces (APIs) can be specifically called:
isWarned (): if the counter reaches or exceeds the alarm value, if the counter returns to '1', otherwise, the counter returns to '0'.
isBlocked (): if the counter reaches a maximum value, return to "1" if reached, and return to "0" otherwise.
getthresremailing (): the remaining number of times of the counter (maximum value-current value) is obtained.
reset (): the value of the counter is reset to 0.
increment (): the value of the counter is incremented by 1.
updateWarning (): and updating the alarm value.
updateMax (): the maximum value is updated.
Alternatively, other RFUs.
When some target application is installed for the SIM card, the installation parameters of the target application are defined, and when an external entity calls the target application, the related API interface is selected to be called.
To ensure that the counting service of the target application does not blindly move, the value of the corresponding counter is decremented by one after each normal response to the target application. In addition, the maximum value or the alarm value of the counter corresponding to the target application can be updated according to actual needs.
According to still another aspect of the embodiments of the present invention, there is also provided a locking apparatus for a SIM card application, as shown in fig. 4, the locking apparatus including:
an obtaining module 101, configured to obtain an instruction that a target application in the SIM card is called by an external entity;
and the processing module 201 is configured to call a counter service module in the SIM card according to the instruction, so that the counter service module locks the target application when determining that the target instruction called in the target application meets the trigger condition for locking the target application.
Wherein, the obtaining module 101 includes:
and the selection unit is used for acquiring a selection instruction of the target application in the SIM card, which is called by an external entity.
Wherein, the processing module 201 includes:
the detection unit is used for detecting whether the current state of the target application is in a locked state or not according to the instruction;
and the processing unit is used for calling the counter service module in the SIM card if the target application is not in the locking state, so that the target application is locked when the counter service module judges that the instruction meets the trigger condition of locking the target application.
Wherein, the processing unit includes:
the first judgment subunit is used for enabling the counter service module to judge whether the initiation frequency of the target instruction called in the target application reaches the preset maximum value of the counter or not;
and the locking subunit is used for locking the target application when the calling times of the target instruction reach the maximum value, and generating a response for locking the target application.
Wherein, the processing unit further comprises:
the second judgment subunit is used for enabling the counter service module to judge whether the initiation frequency of the target instruction called in the target application reaches the alarm value of the counter or not; wherein the alarm value is less than or equal to the preset maximum value of the counter;
and the alarm subunit is used for generating alarm information when the calling times of the target instruction reach an alarm value.
Wherein, the locking device of the SIM card application further comprises: and the synchronization module is used for enabling the counter service module to synchronize the counting information of the counter to the counter platform or the service platform.
It should be noted that the locking apparatus is an apparatus corresponding to the locking method applied to the SIM card, and all implementation manners in the method embodiments are applicable to the embodiment of the apparatus, and the same technical effect can be achieved.
According to still another aspect of the embodiments of the present invention, as shown in fig. 5, there is also provided a SIM card, including the locking device for SIM card application as described above, and a card application module and a counter service module; the card application module corresponds to the acquisition module and is mainly used for calling counting services for various SIM card applications; the counter service module corresponds to the processing module and is mainly used for detecting whether the calling frequency of the target instruction in the target application reaches the trigger threshold of locking the application, and locking the target application once the calling frequency of the target instruction in the target application reaches the trigger threshold of locking the application, so that the safety of the target application is ensured.
According to yet another aspect of the present invention, as shown in fig. 5, there is also provided a system comprising a SIM card as described above, an external entity cooperating with the SIM card, and a service platform and a counter platform connected to the SIM card. The external entity may be a smart phone, a POS machine, a card reader, or an SP platform, which may implement card application. The service platform refers to a server or a network platform corresponding to various applications. The counter platform is mainly used for distributing different counters for different card applications and managing the counters.
As shown in fig. 6, the locking process of the SIM card application will be described in detail below with reference to the system architecture of the embodiment of the present invention:
step (1): the external entity SELECTs the target application of the SIM card, and specifically, the card application can be selected by the existing SELECT command.
Step (2): the card application module within the SIM card detects whether the selected card application is in a locked state, and returns an error value if the card application is locked. That is, if it is detected that the target application is currently in the locked state, it is impossible to respond to the target application, an error value is returned, and the access process of the target application is ended.
And (3): if the target application is detected not to be in the locked state, calling an interface corresponding to the target application, such as: SMS or APDU, etc.
And (4): the card application module determines whether to call the API related to the counter according to the requirement, namely determines whether to call the API related to the counter according to the importance of the current target instruction.
And (5): if the current target instruction belongs to the important instruction, calling the API of the counter, such as: the increment () interface, that is to say the target instruction is not received, increments the counter value by one.
And (6): and a counter service module in the SIM card judges whether the counter meets a trigger condition, namely whether the value of the current counter reaches the maximum value.
And (7): if the maximum value is not reached, the response is normal.
And (8): if the counter reaches a maximum value, the application is locked.
And (9): after the target application is locked, the counter service module returns a card application locking response to the card application module, so that the external entity receives the response that the target application is locked.
Step (10): if the counter does not reach the maximum value, the counter service module will continue to detect whether the counter reaches the alarm value, and if the counter does not reach the maximum value but reaches the alarm value, step (11) is performed.
Step (11): the counter service module sends an alarm short message through the active command request terminal, namely, requests an external entity to send alarm information to the counter platform or the service platform.
Step (12): when the counter reaches the alarm value, the target application will still be responded to normally.
Step (13): when networking, the counter service module synchronizes the counting information of the counter of the target application to the counter platform.
Step (14): and after the counter platform receives the counting information of the counter corresponding to the target application, the counting information is forwarded to the service platform.
The key instructions in the target application can be protected by modifying and reinforcing the flow of the card application, so that the problem of improving the safety of the card application is solved.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (12)
1. A locking method for SIM card application is characterized by comprising the following steps:
the method comprises the steps that an instruction called by an external entity of a target application in an SIM card is obtained, the instruction is a selection instruction, when the external entity initiates access of a certain target application, the selection instruction is sent to the SIM card, and the target application is selected;
according to the instruction, calling a counter service module in the SIM card to lock the target application when the counter service module judges that the target instruction called in the target application meets the trigger condition for locking the target application, wherein the method comprises the following steps:
detecting whether the current state of the target application is in a locked state or not according to the instruction;
if the target application is not in the locking state, calling a counter service module in the SIM card to lock the target application when the counter service module judges that the instruction meets the trigger condition of locking the target application.
2. The SIM card application locking method according to claim 1, wherein the step of obtaining the instruction that the target application in the SIM card is invoked by the external entity comprises:
and acquiring a selection instruction of the target application in the SIM card, which is called by an external entity.
3. The method according to claim 1, wherein when the counter service module determines that the target instruction called in the target application satisfies the trigger condition for locking the target application, the step of locking the target application comprises:
the counter service module judges whether the calling times of the target instructions called in the target application reach the preset maximum value of the counter or not;
if so, the target application is locked and a response is generated to lock the target application.
4. The method according to claim 1, wherein when the counter service module determines that the target instruction invoked in the target application satisfies the trigger condition for locking the target application, the step of locking the target application further comprises:
the counter service module judges whether the calling times of the target instructions called in the target application reach the alarm value of the counter or not; wherein the alarm value is less than or equal to a preset maximum value of a counter;
if the alarm is reached, alarm information is generated.
5. The method for locking the SIM card application according to claim 3 or claim 4, further comprising: and the counter service module synchronizes the counting information of the counter to the counter platform or the service platform.
6. A locking device for SIM card applications, comprising:
the acquisition module is used for acquiring a command called by an external entity of a target application in the SIM card, wherein the command is a selection command, and when the external entity initiates the access of a certain target application, the acquisition module sends a selection command to the SIM card to select the target application;
the processing module is used for calling a counter service module in the SIM card according to the instruction so as to lock the target application when the counter service module judges that the target instruction called in the target application meets the trigger condition of locking the target application; the processing module comprises:
the detection unit is used for detecting whether the current state of the target application is in a locked state or not according to the instruction;
and the processing unit is used for calling a counter service module in the SIM card if the target application is not in a locked state, so that the target application is locked when the counter service module judges that the instruction meets the trigger condition of locking the target application.
7. The SIM card application locking apparatus of claim 6, wherein the obtaining module:
and the selection unit is used for acquiring a selection instruction of the target application in the SIM card, which is called by an external entity.
8. Locking device for SIM card applications according to claim 6, characterized in that said processing unit comprises:
the first judging subunit is configured to enable the counter service module to judge whether the initiation number of the target instruction called in the target application reaches a preset maximum value of a counter;
and the locking subunit is used for locking the target application when the calling frequency of the target instruction reaches the maximum value, and generating a response for locking the target application.
9. The SIM card application locking apparatus of claim 6, wherein the processing unit further comprises:
a second judging subunit, configured to enable the counter service module to judge whether the initiation number of the target instruction called in the target application reaches an alarm value of a counter; wherein the alarm value is less than or equal to a preset maximum value of a counter;
and the alarm subunit is used for generating alarm information when the calling times of the target instruction reach the alarm value.
10. The SIM card application locking apparatus according to claim 8 or claim 9, further comprising: and the synchronization module is used for enabling the counter service module to synchronize the counting information of the counter to the counter platform or the service platform.
11. A SIM card comprising a locking means for a SIM card application as claimed in any one of claims 6 to 10, and a SIM card application module and a counter service module.
12. A system comprising a SIM card according to claim 11, an external entity cooperating with said SIM card, and a service platform and a counter platform connected to said SIM card.
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| CN201510324216.8A CN106255094B (en) | 2015-06-12 | 2015-06-12 | SIM card application locking method and device, SIM card and system |
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| CN201510324216.8A CN106255094B (en) | 2015-06-12 | 2015-06-12 | SIM card application locking method and device, SIM card and system |
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