CN102655642B - User identification module and information interaction method based on same - Google Patents

Abstract

The invention provides a user identification module and an information interaction method based on the same. The user identification module comprises a radio frequency module, a non-contact radio frequency antenna, a main control module and a read-write control module, wherein the main control module is used for controlling the read-write control module to perform non-contact communication mode conversion; the read-write control module is used for controlling the user identification module to select a reader-writer communication mode, a card communication mode or a peer-to-peer communication mode and controlling the radio frequency module to transmit and receive data under the corresponding mode according to the current communication mode of the user identification module; and the radio frequency module is used for transmitting and receiving the data through the non-contact radio frequency antenna according to the control of the read-write control module. According to the user identification module and the information interaction method, non-contact communication among the user identification modules is realized, so that a user can acquire a non-contact communication service under the condition that a user terminal is not replaced; and the control power of an operator over the non-contact service is improved.

Description

A user identification module and an information interaction method based on the user identification module

technical field

The invention relates to the field of communication technology, in particular to a user identification module and an information interaction method based on the user identification module.

Background technique

Mobile communication technology has developed rapidly in modern society. Radio frequency identification technology, short-distance communication technology, wireless technology, smart card technology, wireless application protocol, public key encryption algorithm, secure electronic transaction protocol, etc. have played an important role in expanding the service field of mobile communication technology. had a positive effect.

In addition to providing the most basic communication functions, modern mobile communication devices and mobile communication systems can provide users with more optional functions. Such as online payment function, non-contact payment function, electronic ticketing and real-time account inquiry and other functions.

As shown in FIG. 1 , it is a schematic diagram of the structure of an electronic wallet Combi-SIM card combined with a contactless transceiver of a mobile device in the prior art. The architecture combines mobile phone Subscriber Identity Module (SIM (Subscriber Identity Module, Customer Identity Module) or USIM (Universal Subscriber Identity Module, Global Subscriber Identity Card)) chips with electronic wallet smart card chips that do not contain non-contact sensing analog circuits. A composite subscriber identity card (hereinafter referred to as Combi-SIM) is combined with a mobile device with a multi-functional contactless transceiver to form an architecture. Based on the signal path selection function of the multi-functional contactless transceiver, the mobile device can not only be used as a contactless card, but also can be used as a card reader to read external contactless cards, or access the content of the electronic wallet smart card in the Combi-SIM . In order to provide the integration of e-wallet and telecom value-added services, consumers can conduct e-wallet transactions anytime and anywhere through the convenience of portable mobile devices.

In the process of realizing the present invention, the inventor finds that there are at least the following problems in the prior art:

On the one hand, two mobile devices for non-contact communication must have the function of non-contact communication at the same time, that is, to obtain the service, both users have to change mobile devices, and the subscriber identification modules cannot communicate directly;

On the other hand, the user identification module cannot control the contactless communication of the mobile device, resulting in the operator's weak control over the business. The operator only serves as a channel in the contactless communication, that is, the user of an operator changes the user. After identifying the module, the user can also enjoy the contactless service of the mobile device.

Contents of the invention

The purpose of the present invention is to provide a subscriber identification module and a communication method based on the subscriber identification module, so as to realize communication between subscriber identification modules, ensure that users can obtain non-contact communication services without changing user terminals, and improve operational efficiency. The control power of the business to the contactless service, for this reason, the present invention adopts the following technical scheme:

An embodiment of the present invention provides a user identification module, including a radio frequency module and a non-contact radio frequency antenna, and also includes a main control module and a read-write control module; wherein,

The main control module is used to control the read-write control module to perform contactless communication mode conversion;

The read-write control module is used to control the user identification module to be in reader-writer communication mode, card communication mode or point-to-point communication mode, and to control the radio frequency module in the corresponding mode according to the current communication mode of the user identification module. Data transmission and reception in mode;

The radio frequency module is used to send and receive data through the non-contact radio frequency antenna according to the control of the read-write control module.

The embodiment of the present invention also provides an information interaction method based on the above-mentioned user identification module, including:

The first subscriber identity module in the card reader mode or the point-to-point communication mode sends a wireless connection establishment request signal;

The second subscriber identity module in the card communication mode or point-to-point communication mode listens to the wireless connection establishment request signal sent by the first subscriber identity module and then returns a wireless connection establishment response signal;

The first subscriber identification module establishes a contactless communication connection with the second subscriber identification module according to the received response signal;

The first subscriber identity module and the second subscriber identity module perform data communication through the established contactless communication connection.

Compared with the prior art, the technical solution proposed by the embodiment of the present invention has the following advantages:

By applying the technical solution proposed by the embodiment of the present invention, the main control module controls the read-write control module to perform non-contact communication mode conversion, and the read-write control module controls the radio frequency module to perform the non-contact radio frequency antenna in different communication modes. The data transmission and reception realizes the communication between the user identification modules, ensures that the user can obtain the contactless communication service without changing the user terminal, and improves the operator's control over the contactless communication service at the same time.

Description of drawings

FIG. 1 is a schematic diagram of the structure of an electronic wallet Combi-SIM card combined with a contactless transceiver of a mobile device in the prior art;

FIG. 2 is a schematic structural diagram of a user identification module provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of pins of a subscriber identification module provided by an embodiment of the present invention;

FIG. 4 is a schematic flowchart of an information interaction method between subscriber identification modules provided by an embodiment of the present invention;

FIG. 5 is a schematic flowchart of an information interaction method between subscriber identification modules provided by another embodiment of the present invention;

Fig. 6 is a schematic flowchart of an information interaction method between subscriber identification modules provided by another embodiment of the present invention.

Detailed ways

Aiming at the defects in the prior art that user terminals must be replaced to obtain contactless communication services, direct communication between subscriber identification modules is impossible, and operators have weak control over contactless communication services, the embodiment of the present invention proposes a subscriber identification module and based on the The technical scheme of the information interaction of the user identification module, through the improvement of the existing user identification module, realizes the communication between the user identification modules, ensures that the user can obtain the non-contact communication service without changing the user terminal, and improves the Operator control over contactless services.

The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the present invention. Apparently, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in FIG. 2 , it is a schematic structural diagram of a subscriber identification module proposed by an embodiment of the present invention. The subscriber identification module may be a SIM card, or other types of subscriber identification cards, such as a USIM card. The description below only takes the SIM card as an example. As shown in the figure, except that the SIM card can include a radio frequency module 23 and a non-contact radio frequency antenna 24, it can also include: a main control module 21, a read-write control module 22; wherein:

The main control module 21 is used to control the read-write control module 22 to perform contactless communication mode conversion;

The read-write control module 22 is used to control the SIM card to be a reader-writer communication mode, a card communication mode or a point-to-point communication mode, and to control the radio frequency module 23 to transmit data in a corresponding mode according to the current communication mode of the SIM card;

Specifically, when the SIM card is in the reader-writer communication mode, the SIM card can continuously send out a radio frequency signal requesting to establish a wireless connection, so as to serve as a reader after establishing a wireless communication connection (contactless communication connection) with other SIM cards. The writer reads information in other SIM cards or writes information to other SIM cards; when the SIM card is in the card communication mode, the SIM card can listen to the radio frequency signal sent by other SIM cards to request the establishment of a wireless connection, so as to communicate with other SIM cards After other SIM cards establish a wireless communication connection (near-field communication connection), other SIMs read the information of the SIM card or receive information written by other SIM cards to the SIM card; when the SIM card is in point-to-point communication mode, the SIM The card can not only continuously send out the radio frequency signal requesting to establish a wireless connection, but also listen to the radio frequency signal sent by other SIM cards to request the establishment of a wireless connection, so that after establishing a wireless communication connection (contactless communication connection) with other SIM cards , it can communicate with other SIM cards both through the reader-writer communication mode and through the card communication mode.

The radio frequency module 23 is used to transmit and receive data through the non-contact radio frequency antenna 24 according to the control of the read/write control module 22 .

Specifically, when the SIM card is in the reader-writer communication mode, the SIM card can continuously send out a radio frequency signal for establishing a connection, and the radio frequency module 23 is used to receive the digital signal for establishing a connection sent by the main control module 21 Convert to a radio frequency signal, and send outwards through the non-contact radio frequency antenna 24, such as sending to other SIM cards in the card communication mode; when the SIM card is in the card communication mode, the SIM card will monitor other non-contact reader-writers (SIM card in reader-writer communication mode) sends the radio frequency signal that is used to establish connection, radio frequency module 23 is used for converting the radio frequency signal that non-contact radio frequency antenna 24 receives into digital signal, and sends to main control Module 21; when the SIM card is in the point-to-point communication mode, the SIM card can continuously send out the radio frequency signal for establishing a connection on the one hand, and monitor other radio frequency signals sent by the SIM card in the point-to-point communication mode on the other hand, and the radio frequency module 23 is used for receiving The digital signal sent by the main control module 21 to establish a connection is converted into a radio frequency signal, and sent outward through the non-contact radio frequency antenna 24, and the radio frequency signal received by the non-contact radio frequency antenna 24 is converted into a digital signal, and Send to the main control module 21.

In order to ensure the security when establishing a wireless connection between SIM cards and prevent replay attacks, a public-private key pair can be stored in the SIM card (the key pair can be set by the operator). The SIM card can use the stored public key to encrypt the wireless connection establishment request signal sent, and carry a random number in the encrypted wireless connection establishment request signal, and the SIM that receives the encrypted wireless connection establishment request signal carrying the random number can The stored private key is used to verify the wireless connection establishment request signal, and a wireless connection establishment response message is returned after the verification is passed. Specifically, the main control module 21 can use the private key to verify the wireless connection establishment request signal when the SIM card is in the card communication mode and the radio frequency module 23 listens to the encrypted wireless connection establishment request signal sent by other SIM cards, And return a wireless connection establishment response message after the verification is successful, and establish a wireless connection with the other SIM cards; Use the wireless connection establishment request signal encrypted by the public key, and establish a wireless connection with the opposite end SIM card after the opposite end SIM card successfully verifies the wireless connection establishment request and returns a wireless connection response message.

The above-mentioned public-private key pair can be used not only for the security verification of the communication connection establishment process, but also for the security guarantee of data transmission. Of course, only the public-private key pair can be used to ensure the security of data transmission.

Specifically, after the wireless connection is established between the SIM cards, in order to improve the security of information interaction between the SIM cards, the main control module 21 can also use the stored public key to encrypt the signal sent by the SIM card and encrypt the encrypted signal. The random number is carried in the signal, and the received signal sent by other SIM cards is verified by using the stored private key.

The above-mentioned public-private key pair can be stored in the main control module 21 , or stored in a storage module 25 independent of the main control module 21 in the SIM card.

The conversion of the three modes of the SIM card can be manually switched by the user, such as the user manually inputting a switching command through the STK (SIM ToolKit, user identification application development tool) menu or the user terminal client to switch the communication mode; it can also be automatically switched, such as When the SIM card in the reader-writer communication mode receives the radio frequency signal of another SIM card, it can automatically switch to the point-to-point communication mode.

Specifically, the main control module 21 can instruct the read-write control module 22 to switch to the corresponding communication mode according to the communication mode switching request input by the user; or, when the SIM card in the reader-writer communication mode receives the wireless When the connection establishment request signal is received, the main control module 21 instructs the read-write control module 22 to switch to the point-to-point communication mode.

It should be noted that in the embodiment of the present invention, the non-contact communication function of the SIM card can be opened by default, and the opening of the non-contact function of the SIM card can also be controlled by a password set by the user. Correspondingly, the main control module 21 or the storage module 25 can also store The password used to determine whether to activate the contactless communication function. For example, if the SIM card is set to enable the non-contact communication function by entering a password, then when the SIM card is in the card communication mode and receives a read/write request from another SIM card in the reader-writer communication mode, the user terminal can A password verification box pops up automatically, prompting the user to input a password for starting the non-contact communication function, and when the input password is consistent with the password stored in the main control module 21 or the storage module 25, the non-contact communication function is started.

The SIM card provided by the embodiment of the present invention may also include an application module 26 for storing application program data and user data. Correspondingly, the main control module 21 can send the user data processed by the application program to the radio frequency module 23, and the digital signal is converted into a radio frequency signal by the radio frequency module 23, and then sent through the non-contact radio frequency antenna 24, and when receiving other SIM When the card sends a signal containing user data, the user data contained in the signal is obtained and sent to the application module 26 for processing.

Specifically, the application module 26 can store specific application programs such as electronic wallets and mobile tickets and related data, such as user account information. Since the application program data stored in the application module 26 has high security requirements, the application module 26 can also be stored in a security chip.

The SIM card may also include a telecommunication module 27 for realizing the telecommunication function of the SIM card. Correspondingly, the main control module 21 is used to control the telecommunication module 27 to realize its telecommunication function.

It should be noted that the SIM cards provided in the embodiment of the present invention can communicate through the IF1 communication mode (that is, the non-contact communication mode between SIM cards), or can use other near-field communication modes for communication.

As shown in Figure 3, it is a schematic diagram of the pins of the SIM card provided by the embodiment of the present invention, wherein:

C1: power supply voltage (VCC); C2: reset (RST); C3: clock (CLK);

C4: reserved for future use; C5: ground (GND); C6: programming voltage (VPP);

C7: input/output (I/O); C8: reserved for future use.

Among them, in the existing SIM card, the C4 pin is reserved for use. In the embodiment of the present invention, the C4 pin is used to realize the data transmission between the SIM card and the user terminal, wherein the SIM card and the user terminal can communicate through IF2 mode (that is, the full-duplex communication mode of the C4 pin) for communication. In specific implementation, the C1 pin and C5 pin can be combined to generate the level signal level and form a loop to transmit the signal for the communication between the SIM card and the user terminal, so that the telecommunication function and the non-contact communication function are mutually independent. Influence.

By applying the technical solutions proposed in the embodiments of the present invention, communication between SIM cards and between SIM cards and user terminals can be realized, ensuring that users can obtain non-contact communication services without changing user terminals, and at the same time improving the communication efficiency of operators. Control over contactless services.

Based on the SIM card provided by the embodiment of the present invention, the embodiment of the present invention also provides a method for information interaction between SIM cards. The SIM card receives radio frequency signals sent by other SIM cards according to its own different modes.

As shown in Figure 4, it is a schematic flow chart of information interaction between SIM cards provided by an embodiment of the present invention. In this embodiment, SIM card A is in reader-writer communication mode, SIM card B is in card communication mode, and SIM card The non-contact communication functions of all are enabled by default. This process describes the process of establishing a contactless communication connection between SIM card A and SIM card B. The process may include:

Step 401, SIM card A sends a radio frequency signal to SIM card B.

Specifically, the main control module 21 of the SIM card A sends a digital signal to the radio frequency module 23, and the radio frequency module 23 converts the received digital signal into a radio frequency signal, and sends it to the SIM card B through the non-contact radio frequency antenna 24.

Step 402, SIM card B receives the radio frequency signal sent by SIM card A, and decodes the radio frequency signal, and returns a response for establishing wireless communication if the decoding is successful.

Specifically, after the radio frequency module 23 of the SIM card B receives the radio frequency signal sent by the SIM card A through the non-contact radio frequency antenna 24, the received radio frequency signal is decoded, and after successful decoding, the radio frequency signal is converted into a digital signal and Send to the main control module 21, and the main control module 21 returns to the SIM card a response for establishing wireless communication through the radio frequency module 23.

Step 403, SIM card A sends a wireless connection establishment request signal to SIM card B, the request signal carries a ciphertext encrypted with a public key, and may further carry a random number.

Specifically, after receiving the wireless communication establishment response returned by SIM card B, SIM card A sends a connection establishment request signal to SIM card B through the radio frequency module 23; The ciphertext encrypted by the key can also carry a random number in one step.

Step 404, SIM card B verifies the ciphertext in the wireless connection establishment request signal by the private key, if the verification is passed, then return the response of establishing the wireless connection, if the verification fails, then reject the wireless connection request; if the wireless connection establishment request signal also carries a random number, then SIM card B verifies SIM card A according to the random number, and returns a response to establish a wireless connection when the verification is successful and SIM card B succeeds in verifying the ciphertext; otherwise, the wireless connection request is rejected.

Specifically, the main control module 21 of the SIM card B uses the stored private key to verify the ciphertext in the received wireless connection establishment request signal, and if the verification is successful, the radio frequency module 23 returns to the SIM card A the information for establishing the wireless connection. Response, if the verification fails, then reject the wireless connection request; when the wireless connection establishment request signal received by the SIM card B also carries a random number, the main control module 21 verifies the SIM card A according to the random number, and when the verification is successful , and when the verification of the ciphertext is successful, the wireless connection establishment response is returned to the SIM card A through the radio frequency module 23, otherwise the wireless connection request is rejected.

Step 405, SIM card A and SIM card B perform data communication through the established contactless communication connection.

Specifically, when the main control module 21 of SIM card A receives a response to establish a wireless connection, a wireless connection (contactless communication connection) is established between SIM card A and SIM card B, and the wireless connection is established through the established contactless communication connection. for data communication.

By applying the technical solutions proposed in the above embodiments of the present invention, the communication between SIM cards is realized, ensuring that users can obtain contactless communication services without changing user terminals, and at the same time improving the operator's control over contactless services .

As shown in Figure 5, it is a schematic flow chart of information interaction between SIM cards provided by another embodiment of the present invention. In this embodiment, SIM card A and SIM card B are both in point-to-point communication mode, and SIM card A and SIM card B The non-contact communication functions of all are selected to be turned on by the user. This process describes the process of establishing a non-contact communication connection between SIM card A and SIM card B. The process may include:

Step 501, SIM card A sends a radio frequency signal to SIM card B, and receives the radio frequency signal sent by SIM card B;

Step 502A, SIM card A decodes the received radio frequency signal of SIM card B, and when the decoding is successful, returns a response agreeing to establish wireless communication;

Step 502B, SIM card B decodes the received radio frequency signal of SIM card A, and when the decoding is successful, returns a response agreeing to establish wireless communication;

Step 503A, when SIM card A successfully decodes the received radio frequency signal and receives a response from SIM card B for agreeing to establish wireless communication, SIM card A sends a wireless connection establishment request signal to SIM card B, in which the request signal Carry the ciphertext and random number encrypted with the public key;

Step 503B, when SIM card B successfully decodes the received radio frequency signal and receives a response from SIM card A for agreeing to establish wireless communication, SIM card B sends a wireless connection establishment request signal to SIM card A, in which the request signal Carry the ciphertext and random number encrypted with the public key;

Step 504A, SIM card A verifies the received ciphertext of the connection establishment request through the private key, and returns a response to establish a wireless connection when the verification is passed;

Step 504B, SIM card B verifies the received ciphertext of the connection establishment request through the private key, and returns a response to establish a wireless connection when the verification is passed;

Step 505, when SIM card A passes the verification of the ciphertext in the received wireless connection establishment request signal, and receives the response of establishing a wireless connection returned by SIM card B, establish point-to-point communication between SIM card A and SIM card B , and perform data communication through the established contactless communication connection.

For the processing flow among the functional modules inside the SIM card in the above flow, refer to the corresponding description in the flow shown in FIG. 4 , which will not be repeated here.

By applying the technical solution proposed by the embodiment of the present invention, the communication between SIM cards is realized, ensuring that users can obtain non-contact communication services without changing user terminals, and at the same time, the operator's control over non-contact services is improved.

In the following, the technical solutions proposed in the embodiments of the present invention will be further described in detail in combination with specific application scenarios of electronic wallet transfer.

The application module in the SIM card stores an electronic wallet application, the account of the electronic wallet is stored in the electronic wallet application of the SIM card, and the transfer password is also stored in the electronic wallet application. When applying for wallet transfer, you must enter the transfer password, and the transfer operation will only be allowed after the e-wallet application verification password is passed. When receiving the transfer, the other party must also enter the transfer password of the other party. Only when the password is entered correctly can the transfer be received. The shadow account corresponding to the SIM card electronic wallet application is saved on the mobile payment platform.

The mobile terminal is loaded with an electronic wallet client. The SIM card in the mobile phone terminal is the SIM card of the above structure, which has a non-contact function, and the non-contact function can be controlled by the main control module.

As shown in Figure 6, the process of electronic wallet transfer by different mobile terminals through contactless means may include:

Step 601, the user selects transfer on the STK menu of the mobile terminal or on the electronic wallet client of the mobile terminal, and enters the transfer amount and the transfer password. For the convenience of description, the SIM card in the mobile terminal is referred to as SIM card A, and the SIM card in the transfer destination mobile terminal is referred to as SIM card B.

Step 602, the electronic wallet application of SIM card A verifies the user's transfer password, and sends a radio frequency signal of a connection establishment request to SIM card B after the verification is passed. Wherein, the non-contact communication function of the SIM card and the SIM card B is enabled by default, and both the SIM card A and the SIM card B are in a point-to-point communication mode.

Step 603, SIM card B returns a response, and establishes a contactless communication connection between SIM card A and SIM card B;

Step 604, the electronic wallet application in the SIM card A generates a verification code MAC1 (including generating a random number of MAC1);

Step 605, SIM card A sends a transfer request to SIM card B; wherein, the transfer request carries the transfer amount and MAC1 (including the random number generating MAC1);

Step 606: After receiving the transfer request, SIM card B prompts the user to enter his own transfer password, and after receiving the transfer password input by the user, the electronic wallet application on SIM card B verifies the transfer password and the received MAC1 ; If the verification is passed, add money to the electronic wallet account of SIM card B, otherwise return a failure response;

Step 607, the electronic wallet application of SIM card B generates MAC2 and the TAC code indicating that the transaction is successful;

Step 608, SIM card B returns a transfer request response to SIM card A; wherein, the response includes MAC2 (including the random number generating MAC2), TAC code;

Step 609, the electronic wallet application in SIM card A verifies MAC2, if the MAC2 verification passes, then deduct the transfer amount of SIM card A electronic wallet;

Step 610, the electronic wallet application of SIM card A generates a transaction record; wherein, the transaction record includes a TAC code for uniquely identifying a transaction; and uploads the transaction record to the mobile payment platform; wherein, the transaction record includes at least the transfer amount and TAC code;

Step 611: After the mobile payment system receives the transaction record, it verifies the TAC code. If the TAC code verification is passed, the transfer amount is deducted from the shadow account of the e-wallet application corresponding to SIM card A and transferred to the e-wallet corresponding to SIM card B. Add the transfer amount to the shadow account of the wallet application;

Step 612, the mobile phone payment system returns the system processing result to SIM card A.

In the above flow, the processing flow of each functional module in SIM card A and SIM card B can refer to the corresponding description shown in FIG. 4 or FIG. 5 , and will not be repeated here.

Through the above description of the implementation manners, those skilled in the art can clearly understand that the embodiments of the present invention can be implemented by hardware, or by means of software plus a necessary general hardware platform. Based on such understanding, the technical solutions of the embodiments of the present invention can be embodied in the form of software products, which can be stored in a non-volatile storage medium (which can be CD-ROM, U disk, mobile hard disk, etc.), Several instructions are included to enable a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in various implementation scenarios of the embodiments of the present invention.

Those skilled in the art can understand that the drawing is only a schematic diagram of a preferred implementation scenario, and the modules or processes in the drawing are not necessarily necessary for implementing the embodiments of the present invention.

Those skilled in the art can understand that the modules in the devices in the implementation scenario can be distributed among the devices in the implementation scenario according to the description of the implementation scenario, or can be located in one or more devices different from the implementation scenario according to corresponding changes. The modules of the above implementation scenarios can be combined into one module, or can be further split into multiple sub-modules.

The serial numbers of the above embodiments of the present invention are for description only, and do not represent the pros and cons of the implementation scenarios.

The above disclosures are only a few specific implementation scenarios of the embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any changes conceivable by those skilled in the art should fall within the scope of business restrictions of the embodiments of the present invention .

Claims (13)

1. A user identification module comprises a radio frequency module and a non-contact radio frequency antenna, and is characterized by also comprising a main control module and a read-write control module; wherein,

the main control module is used for controlling the read-write control module to carry out non-contact communication mode conversion;

the read-write control module is used for controlling the user identification module to be in a reader-writer communication mode, a card communication mode or a point-to-point communication mode, and controlling the radio frequency module to receive and transmit data in a corresponding mode according to the communication mode of the user identification module;

the radio frequency module is used for receiving and transmitting data through the non-contact radio frequency antenna according to the control of the read-write control module;

the system further comprises a storage module in which a public and private key pair is stored, or the master control module stores the public and private key pair;

the main control module is further configured to verify the wireless connection establishment request signal by using the private key when the user identification module is in a card communication mode and the radio frequency module monitors an encrypted wireless connection establishment request signal which is sent by an opposite-end user identification module and carries a random number, and establish wireless connection with the opposite-end user identification module after the verification is successful; and when the user identification module is in a reader-writer communication mode, sending a wireless connection establishment request signal which is encrypted by using the public key and carries a random number to an opposite-end user identification module, and establishing wireless connection with the opposite-end user identification module after the opposite-end user identification module successfully verifies the wireless connection establishment request.

2. The subscriber identity module according to claim 1, further comprising a storage module storing a public-private key pair, or the master module storing a public-private key pair;

the master control module is further configured to encrypt a signal sent by the user identification module by using the public key, send the signal to the radio frequency module after carrying a random number in the signal, and verify the signal sent by the opposite-end user identification module and received by the radio frequency module by using the private key.

3. The subscriber identity module of claim 1, further comprising a storage module having a password stored therein, or wherein the main control module has a password stored therein;

the main control module is also used for verifying the password input by the user by using the password and indicating the read-write control module to start the non-contact communication function after the verification is passed.

4. The subscriber identity module of claim 1, wherein the main control module is specifically configured to instruct the read/write control module to switch to a corresponding communication mode according to a communication mode switching request input by a user.

5. The subscriber identity module of claim 1, wherein the main control module is specifically configured to, when the subscriber identity module is in a reader/writer communication mode, instruct the read/write control module to switch to a peer-to-peer communication mode if a wireless connection establishment request signal sent by another subscriber identity module is received.

6. The subscriber identity module of claim 1, wherein the read-write control module is specifically configured to, when the subscriber identity module is in a reader-writer communication mode, instruct the radio frequency module to convert a received digital signal sent by the main control module into a radio frequency signal, and send the radio frequency signal to another subscriber identity module through the non-contact radio frequency antenna; when the user identification module is in a card communication mode, the radio frequency module is indicated to convert radio frequency signals received by the non-contact antenna and sent by other user identification modules into digital signals and send the digital signals to the main control module; and when the user identification module is in a point-to-point communication mode, the radio frequency module is instructed to convert the received digital signals sent by the main control module into radio frequency signals and send the radio frequency signals to other user identification modules through the non-contact radio frequency antenna, and the radio frequency signals received by the non-contact radio frequency antenna and sent by the other user identification modules are converted into digital signals and sent to the main control module.

7. The subscriber identity module according to any of claims 1 to 6, further comprising:

the application module is used for storing application program data and user data;

the main control module is specifically configured to send user data processed by an application program to the radio frequency module, send the user data through the non-contact radio frequency antenna by the radio frequency module, and send the user data to the application module for processing when receiving the user data sent by the opposite-end user identification module.

8. The subscriber identity module according to any of claims 1 to 6, further comprising:

a telecommunications module for implementing telecommunications functions of the subscriber identity module;

the main control module is also used for controlling the telecommunication module to realize the telecommunication function.

9. An information interaction method implemented based on the subscriber identity module of any one of claims 1 to 8, comprising:

a first user identification module in a card reader-writer mode or a point-to-point communication mode sends a wireless connection establishment request signal;

the second user identification module in the card communication mode or the point-to-point communication mode returns a wireless connection establishment response signal after intercepting the wireless connection establishment request signal sent by the first user identification module;

the first user identification module establishes non-contact communication connection with the second user identification module according to the received response signal;

and the first subscriber identification module and the second subscriber identification module carry out data communication through the established non-contact communication connection.

10. The method of claim 9, wherein the first subscriber identity module sends a wireless connection establishment request signal, specifically:

the first user identification module encrypts a wireless connection establishment request by using a stored public key and sends the wireless connection establishment request after carrying a random number;

the second subscriber identity module returns a response signal for establishing the wireless connection, which specifically comprises the following steps:

the second user identification module verifies the intercepted encrypted wireless connection establishment request carrying the random number by using the stored private key, and returns a wireless connection establishment response signal after the verification is successful.

11. The method of claim 9, wherein before the first subscriber identity module transmits the wireless connection establishment request signal, further comprising:

the first user identification module verifies the password input by the user by using the stored password for judging whether the non-contact communication function is started or not, and starts the non-contact communication function after the verification is passed.

12. The method of claim 9, wherein the subscriber identity module switches to a corresponding communication mode according to a communication mode switching request input by a user, and the communication mode includes a reader communication mode, a card communication mode, and a peer-to-peer communication mode.

13. The method of claim 9, wherein when the subscriber identity module in the reader/writer communication mode receives a wireless connection setup request signal transmitted from another subscriber identity module, the subscriber identity module switches to the peer-to-peer communication mode.