What does stk mean?

STK is the abbreviation of English SIM Tool Kit, which is called User Identification Application Development Tool for short.

STK is the abbreviation of English SIM Tool Kit, which is called user identification application development tool for short. It is an application menu developed in GSM mobile phone by using ultra-large capacity SIM card.

STK card is not an ordinary SIM card, but a Simera32K card based on Java language platform. STK is a small programming language software that can be solidified in the SIM card. It can receive and send GSM short message data as an interface between SIM card and short message, and it also allows SIM card to run its own application software.

Precautions for STK:

STK can encrypt the user's data at the bottom of the user's mobile phone. Encrypted data can only be decrypted at the right end of encryption, and the user's key data is safe during transmission.

The encryption algorithm adopts 3DES algorithm with double key groups, the data packet length is 8 bytes, and the key length is 8 bytes. The security of data is guaranteed by the key. Therefore, STK's relatively safe characteristics have been recognized by finance, bonds, telecommunications and other industries, paving the way for its wide application.

In the past, SIM card mobile phones widely used can only accomplish simple functions provided by some mobile phone manufacturers, such as user identification and storing common numbers, while STK card mobile phones can provide additional menus, including information on demand and mobile banking.