STK is the English abbreviation of SIM Tool Kit. It is the "user identification application development tool". It contains a set of instructions for the mobile phone to interact with the SIM card, which allows the SIM card to run small applications within the card for value-added services. The reason why the small application is called because of the limitation of the SIM card space, the application in the STK card is not large, and the function is simple and easy to use. At present, the mainstream STK cards provided by the market mainly include 16K and 32K; 64K cards are also actively marketed.
The difference between an STK card and a normal SIM card is that the application is solidified in the STK card. Provides a text menu interface to the user via software activation. This text menu interface allows users to retrieve information and even trade through simple button operations. For example, if the end user wants to query the weather forecast, in the absence of the STK value-added service, the user needs to manually edit the short message "TQ 010" and then send the short message to the 168 service platform. Thus the user needs to remember that "TQ" is the command code for the weather forecast and the 168 service platform number. In fact, there are many command codes such as "GP" for stock inquiry and "HF" for telephone fee inquiry. Therefore, it is inconvenient for the user to remember all the command codes. The STK provides a menu prompt such as "weather forecast" by curing the program in the card, so that the user only needs to input the long-distance area code of the area to be queried to check the weather. Therefore, the user does not have to memorize the command code and the service platform number, thereby achieving the purpose of facilitating the user.
The basis for the implementation of STK value-added services is GSM short messages. Therefore, as long as it is the place covered by the GSM network, it can provide text information services with a wide range of services; and the text short message is cheap, only charged when it is successfully delivered, and does not include roaming charges; the number of STK card users based on the above reasons The business model is now maturing.
The STK card platform is not uniform, and the STK programs developed by various vendors are not compatible with each other. In this way, each card vendor's application can only run on its own specific platform. This brings great inconvenience to operators. JAVA technology is used in STK cards as Java cards. The technical issues related to Java cards are not discussed in this article because there is a lot of information in this area. This article only briefly introduces the implementation and characteristics of STK's STK.
First of all, the company's STK card fully complies with a series of specifications such as GSM11.11, GSM11.14, GSM03.08, so its usability is no different from other companies' STK cards, and can fully meet the needs of different operators. Various needs for information inquiry, stock trading, and banking transactions. Secondly, the implementation of the STK card of the company is similar to the implementation of the JAVA card. It is also implemented in the SIM card with an interpreter that interprets the execution of bytecode. The difference with the JAVA card is that the interpreter is developed independently, and the bytecode is also in the proprietary format of the company. The advantage of the company's STK card solution is that the programming of the SIM card is optimized, so the interpreter's execution efficiency and footprint are significantly better than the JAVA card interpreter. For the above reasons, the company's STK card program runs fast and can implement more applications on cards of the same capacity. Once again, the STK card of the company can be selectively used in combination with PKI, and the signature verification is performed by the RSA algorithm implemented in the card. Therefore, using mobile phones to engage in mobile commerce activities is no longer a matter of paper.
The above is only an overview of the development of the STK card of the company, the purpose is to let the reader have a preliminary understanding of the STK card solution of the company.
The difference between an STK card and a normal SIM card is that the application is solidified in the STK card. Provides a text menu interface to the user via software activation. This text menu interface allows users to retrieve information and even trade through simple button operations. For example, if the end user wants to query the weather forecast, in the absence of the STK value-added service, the user needs to manually edit the short message "TQ 010" and then send the short message to the 168 service platform. Thus the user needs to remember that "TQ" is the command code for the weather forecast and the 168 service platform number. In fact, there are many command codes such as "GP" for stock inquiry and "HF" for telephone fee inquiry. Therefore, it is inconvenient for the user to remember all the command codes. The STK provides a menu prompt such as "weather forecast" by curing the program in the card, so that the user only needs to input the long-distance area code of the area to be queried to check the weather. Therefore, the user does not have to memorize the command code and the service platform number, thereby achieving the purpose of facilitating the user.
The basis for the implementation of STK value-added services is GSM short messages. Therefore, as long as it is the place covered by the GSM network, it can provide text information services with a wide range of services; and the text short message is cheap, only charged when it is successfully delivered, and does not include roaming charges; the number of STK card users based on the above reasons The business model is now maturing.
The STK card platform is not uniform, and the STK programs developed by various vendors are not compatible with each other. In this way, each card vendor's application can only run on its own specific platform. This brings great inconvenience to operators. JAVA technology is used in STK cards as Java cards. The technical issues related to Java cards are not discussed in this article because there is a lot of information in this area. This article only briefly introduces the implementation and characteristics of STK's STK.
First of all, the company's STK card fully complies with a series of specifications such as GSM11.11, GSM11.14, GSM03.08, so its usability is no different from other companies' STK cards, and can fully meet the needs of different operators. Various needs for information inquiry, stock trading, and banking transactions. Secondly, the implementation of the STK card of the company is similar to the implementation of the JAVA card. It is also implemented in the SIM card with an interpreter that interprets the execution of bytecode. The difference with the JAVA card is that the interpreter is developed independently, and the bytecode is also in the proprietary format of the company. The advantage of the company's STK card solution is that the programming of the SIM card is optimized, so the interpreter's execution efficiency and footprint are significantly better than the JAVA card interpreter. For the above reasons, the company's STK card program runs fast and can implement more applications on cards of the same capacity. Once again, the STK card of the company can be selectively used in combination with PKI, and the signature verification is performed by the RSA algorithm implemented in the card. Therefore, using mobile phones to engage in mobile commerce activities is no longer a matter of paper.
The above is only an overview of the development of the STK card of the company, the purpose is to let the reader have a preliminary understanding of the STK card solution of the company.
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