SAM is the secure storage module of SIM card. SAM card is usually installed on the terminal equipment of smart card, and its function is to realize the legal authentication between the terminal and the card, which is widely used in the fields of city card, enterprise card, identity identification and so on.

Smart card is also the floorboard of plastic card with embedded microchip. Some smart cards contain microelectronic chips, and smart cards need to interact with each other through card readers.

Extended data:

The use of smart cards can be divided into the following four points:

1. Identification —— The data is mathematically calculated by using embedded microcomputer system to confirm its uniqueness.

2. Payment tools-the built-in counter is replaced by currency, points, etc. Digital data.

3. With the rapid development of encryption and decryption network, the utilization rate of e-commerce has also been greatly improved. In addition to increasing the security of the card, offline operation can also be adopted to reduce the communication cost on the network.

4. Due to the popularity of GSM mobile phones, the demand for SIM cards has greatly increased, which has accelerated the technical development of smart cards and extended the mobile phone from the original simple telephone function to today's internet access function. Its information storage function makes it widely used in the commercial field.