WO2016131324A1

WO2016131324A1 - Implementation method and device for reprogrammable sim cards

Info

Publication number: WO2016131324A1
Application number: PCT/CN2015/096003
Authority: WO
Inventors: 杨海城
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-07-17
Filing date: 2015-11-30
Publication date: 2016-08-25
Also published as: CN106358176A

Abstract

A highly secured implementation method and device for reprogrammable SIM cards. The method comprises: applying a new number with a cloud server; downloading new number information to the present device; decrypting the new number information; writing the decrypted new number information into the SIM card. The device comprises: an application module, a download module, a number management module, and a SIM card write module. In said technical solution, the downloaded new number information is encrypted, and the decrypted new number information is directly stored in the SIM card, thereby substantially enhancing security. Additionally, the new number information is stored in the SIM card, and can be tested using the 3GPP protocol standard.

Description

Method and device for implementing reprogrammable SIM card

Technical field

This document relates to, but is not limited to, the field of mobile communication technologies, and in particular to a method and apparatus for implementing a reprogrammable SIM (Subscriber Identity Module) card.

Background technique

International roaming communication costs are relatively high. Users who are sensitive to tariffs will apply for a local operator's prepaid SIM card at the airport upon arrival at the destination. To apply for a purchase, you need to queue up and fill in the materials. It takes one or two hours to get the business when you are busy, which makes many users feel annoyed.

At the end of 2013, the Global System for Mobile Communications Alliance (GSMA) agreed on the unification of reprogrammable SIM cards, and reprogrammable SIM cards became popular. Therefore, some manufacturers in the industry propose a soft SIM card solution: send hard SIM card information, apply for a soft SIM card number from the soft SIM card server of the roaming country communication network, and download the soft SIM card information to the mobile phone. The soft SIM card number is released after leaving the roaming country.

The main problems of the soft SIM card solution are:

1. The solution implements the authentication and encryption operations of the SIM card through software, which has potential security risks and cannot be tested by protocol standards such as 3GPP;

2, the realization of a card soft dual standby function, power consumption;

3. You can only apply for one number at a time.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

Embodiments of the present invention provide a method and apparatus for implementing a reprogrammable SIM card to solve the technical problem of how to improve the security of the SIM card.

An embodiment of the present invention provides a method for implementing a reprogrammable SIM card, including:

Request a new number from the cloud server;

Download new number information to the current device;

Decrypting the new number information;

Write the decrypted new number information to the SIM card.

Optionally, the method further includes: deciding whether to switch to the new number according to the network status.

Optionally, the applying for the new number to the cloud server includes: applying for a new number to the cloud server, and sending the current SIM information and/or the current device information to the cloud server when the cloud server requests the identity verification.

Optionally, the writing the decrypted new number information to the SIM card comprises: writing the new number information to a SIM card toolkit STK dedicated menu in the SIM card, where the STK dedicated menu is used to store all the current devices. Number information.

Optionally, the determining whether to switch to the new number according to the network status includes: reading a mobile country code MCC of the currently camped network, determining whether there is a new number in the SIM card that matches the MCC, and if yes, The SIM card switches to the new number.

The embodiment of the invention further provides an implementation device of the reprogrammable SIM card, comprising: an application module, a download module, a number management module and a write SIM card module, wherein:

The application module is configured to apply for a new number to the cloud server;

The downloading module is configured to download new number information to the current device;

The number management module is configured to decrypt the new number information;

The write SIM card module is configured to write the decrypted new number information to the SIM card.

Optionally, the number management module is further configured to: decide whether to switch to a new number according to the network status.

Optionally, the application module is configured to apply for a new number to the cloud server by using the following method: the application module applies for a new number to the cloud server, and sends the current SIM information to the cloud server when the cloud server requests authentication. / or current device information.

Optionally, the write SIM card module is configured to write the decrypted new number information into the SIM card by writing: the write SIM card module writes the new number information into the SIM card kit STK in the SIM card. A dedicated menu, the STK dedicated menu is used to store all number information in the current device.

Optionally, the number management module is configured to determine whether to switch to a new number according to a network state by: the number management module reads a mobile country code MCC of the currently camped network, and determines whether there is a The new number of the MCC match, if any, switches the SIM card to the new number.

The embodiment of the invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and the computer executable instructions are used to execute the above method.

In the embodiment of the present invention, the downloaded new number information is encrypted, and the decrypted new number information is directly saved in the SIM card, and the security is greatly improved, and since the new number information is saved in the SIM card, the 3GPP protocol standard can be adopted. test. Implementing a single card single standby with the solution of the embodiment of the present invention does not increase the power consumption of the device. In addition, by using the method of the embodiment of the present invention, multiple numbers can be applied to the SIM card at one time, and when the network status changes are detected, the new number is automatically switched to provide a better experience for the user.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a flowchart of a method according to Embodiment 1 of the present invention;

2 is a schematic diagram of a device according to Embodiment 2 of the present invention;

3 is a flow chart of interaction between the application example application module 101 and the cloud according to the present invention;

4 is a flow chart of interaction between the application example download module 102 and the cloud according to the present invention;

FIG. 5 is a schematic diagram of a new STK menu according to an application example of the present invention; FIG.

FIG. 6 is a schematic diagram of an STK menu after a new number is written in an application example of the present invention.

Embodiments of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

The steps illustrated in the flowchart of the figures may be executed in a computer system such as a set of computer executable instructions. Also, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

Example 1

The embodiment provides a reprogrammable SIM card implementation method, and is applied to a device for reprogramming a SIM card. As shown in FIG. 1 , the method includes:

Step 10: Apply for a new number to the cloud server;

In this step, the cloud server is requested to apply for a new number, and when the cloud server requests authentication, the current SIM information and/or current device information is sent to the cloud server.

Step 20: Download the new number information to the current device.

Step 30: decrypt the new number information;

In step 40, the decrypted new number information is written into the SIM card.

In this step, the new number information is written into the SIM card toolkit (STK) dedicated menu in the SIM card, and the STK dedicated menu is used to store all the number information in the current device.

Optionally, the method further includes the following steps:

Step 50: Determine whether to switch to the new number according to the network status.

In this step, the mobile country code (MCC) of the currently camped network is read, and it is determined whether there is a new number in the SIM card that matches the MCC, and if so, the SIM card is switched to the new number.

In this embodiment, the downloaded new number information is encrypted, and the decrypted new number information is directly saved in the SIM card, and the security is greatly improved, and since the new number information is stored in the SIM card, the 3GPP protocol standard can be tested. . Implementing a single card single standby with the solution of the embodiment of the present invention does not increase the power consumption of the device. In addition, by using the method of the embodiment of the present invention, multiple numbers can be applied for saving in the SIM at one time. The card automatically switches to the new number when it detects that the network status changes, providing a better experience for the user.

Example 2

The embodiment provides an apparatus for implementing a reprogrammable SIM card. As shown in FIG. 2, the application module includes: an application module 101, a download module 102, a number management module 103, and a write SIM card module 104, wherein:

The application module 101 is configured to apply for a new number to the cloud server;

The downloading module 102 is configured to download the new number information to the current device;

The number management module 103 is configured to decrypt the new number information;

The write SIM card module 104 is configured to write the decrypted new number information to the SIM card.

The application module 101 is configured to apply for a new number to the cloud server, and the application module 101 applies for a new number to the cloud server, and sends the current SIM information to the cloud server when the cloud server requests authentication. Current device information.

The write SIM card module 104 is configured to write the decrypted new number information into the SIM card, and includes: the write SIM card module 104 writes the new number information into the STK dedicated menu in the SIM card, the STK The dedicated menu is used to store all number information in the current device.

Optionally, the number management module 103 is further configured to: decide whether to switch to a new number according to the network status. The method includes: the number management module 103 reads the MCC of the currently camped network, determines whether there is a new number in the SIM card that matches the MCC, and if so, switches the SIM card to the new number.

Application example

This example is based on a reprogrammable SIM card. Users can purchase and download new numbers in one or more countries in advance according to the itinerary before they leave the country. After the destination arrives, the corresponding new one will be activated automatically. number.

The mobile terminal used by the user in this example includes an application module 101, a download module 102, a number management module 103, and a write SIM card module 104. among them:

The application module 101 is configured to send the original SIM card information and the device identification information of the mobile terminal to the cloud server (hereinafter referred to as the cloud) to apply for and purchase a new number of the destination country or region. The cloud can be a server of an operator, or it can be a third-party server that has purchased a number segment of multiple carriers. The original SIM card information and the device identification of the mobile terminal are used for identity verification, and can also be used as an encryption parameter for the new number.

Optionally, the application module 101 is configured to apply for a new number of multiple countries or regions to the cloud; receive the tariff information of an operator of the applied country or region sent by the cloud; send a request to the cloud, select one of the items. The package receives the authentication request sent by the cloud; sends the original SIM card information and the device identifier of the mobile terminal to the cloud; and receives the “application successful” information returned by the cloud.

The original SIM card information is information of the SIM currently being used by the mobile terminal, including an IMSI (International Mobile Subscriber Identification Number).

The interaction process between the application module 101 and the cloud is as shown in FIG. 3.

The download module 102 is set to download the new number information of the application to the local.

Optionally, the downloading module 102 is configured to send a download request to the cloud; receive an authentication request initiated by the cloud; send the original SIM card information and the device identifier of the mobile terminal to the cloud; and receive the information according to the original SIM card sent by the cloud encryption. And the new number information queried by the device identification number of the mobile terminal; the "download success" message is sent to the cloud.

The interaction process between the download module 102 and the cloud is as shown in FIG. 4.

The number management module 103 is arranged to decrypt the downloaded new number information and notify the write SIM card module 104 to write the new number to the SIM card.

Optionally, the number management module 103 is configured to obtain the encrypted new number information stored locally by the download module 102; decrypt the new number information; and notify the write SIM card module 104 to write the new number information into the SIM card.

The write SIM card module 104 is arranged to write one or more new number information into a reprogrammable SIM card.

Optionally, the write SIM card module 104 is configured to create a new STK (SIM Toolkit) menu in the STK application, and the menu name is “one card multiple number”; the operator name and country short name to which the original number belongs Add to the first sub-item of the new STK menu; obtain all the number information of the application from the number management module 103; sequentially write all the new number information to the STK application in the SIM card; the operator to which the new number belongs The name and country abbreviation are added to the blank item in the new STK menu.

The new number information includes but is not limited to: ICCID (Integrate Circuit Card Identity), IMSI, Ki (Key identifier, authentication key), Key (Key), OP (Operator Variant Algorithm Configuration Field, operation) Business Root Key), FPLMN (Forbidden Public Land Mobile Network), HPLMN (Home PLMN, Home Public Land Mobile Network).

The new number information is written to the storage space of the STK application, wherein the authentication related information is not visible to the user. The STK application displays the number of countries or regions currently stored by the “One Card Multiple Number” menu.

The effect of the new STK menu is shown in Figure 5. After all new numbers are written to the STK application, the STK menu effect is shown in Figure 6. Where ▲ indicates that the number is currently being used.

Optionally, the number management module 103 is further configured to notify the SIM card to switch to the corresponding new number after monitoring the network status change.

Optionally, the number management module 103 is configured to monitor the change of the network status, and read the MCC (Mobile Country Code) of the resident network; if the SIM card has a new number matching the MCC, notify the SIM The card switches to the corresponding new number, updates the "One Card Multiple Number" submenu of the STK menu, and identifies the new number as the currently used number.

In order to avoid the high cost of international roaming communication, users can purchase and download new numbers of multiple destination countries or regions in advance according to the itinerary before going abroad. When the destination is reached, the corresponding new number will be activated automatically.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be performed by a program to instruct related hardware, such as a processor, which may be stored in a computer readable storage medium, such as a read only memory, disk or optical disk. Wait. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function. The invention is not limited to any specific form of combination of hardware and software.

It should be understood by those skilled in the art that the present invention may be modified or equivalently substituted without departing from the spirit and scope of the invention.

Industrial applicability

The above technical solution improves the security of storing data in the SIM card; realizes single card single standby, does not increase the power consumption of the device; can apply for multiple numbers to be saved in the SIM card at one time, and automatically monitors when the network status changes. Switch to the new number to give the user a better experience.

Claims

A method for implementing a reprogrammable customer identification module SIM card, comprising:

Request a new number from the cloud server;

Download new number information to the current device;

Decrypting the new number information;

Write the decrypted new number information to the SIM card.
The method of claim 1 further comprising:

Decide whether to switch to the new number based on the network status.
The method of claim 1 wherein

The applying for the new number to the cloud server includes: applying for a new number to the cloud server, and sending the current SIM information and/or the current device information to the cloud server when the cloud server requests the identity verification.
The method of claim 1 wherein

The writing of the decrypted new number information to the SIM card includes: writing the new number information to the SIM card toolkit STK dedicated menu in the SIM card, and the STK dedicated menu is used to store all the number information in the current device.
The method of claim 2, wherein

Determining whether to switch to the new number according to the network status includes: reading the mobile country code MCC of the currently camped network, determining whether there is a new number in the SIM card that matches the MCC, and if so, the SIM card Switch to the new number.
An apparatus for implementing a reprogrammable customer identification module SIM card, comprising: the application module, configured to apply for a new number to a cloud server;

The downloading module is configured to download new number information to the current device;

The number management module is configured to decrypt the new number information;

The write SIM card module is configured to write the decrypted new number information to the SIM card.
The apparatus according to claim 6, wherein the number management module is further configured to:

Decide whether to switch to the new number based on the network status.
The apparatus according to claim 6, wherein

The application module is configured to apply for a new number to the cloud server by:

The application module applies for a new number to the cloud server, and sends current SIM information and/or current device information to the cloud server when the cloud server requests authentication.
The apparatus according to claim 6, wherein

The write SIM card module is configured to write the decrypted new number information into the SIM card by:

The write SIM card module writes the new number information to the SIM card toolkit STK dedicated menu in the SIM card, and the STK dedicated menu is used to store all the number information in the current device.
The apparatus according to claim 7, wherein

The number management module is configured to implement whether to switch to a new number according to the network status by:

The number management module reads the mobile country code MCC of the currently camped network, determines whether there is a new number in the SIM card that matches the MCC, and if so, switches the SIM card to the new number.
A computer storage medium having stored therein computer executable instructions for performing the method of any one of claims 1 to 5.