Security module is one of the core components of card reader, its main function is to ensure the security of data transmission and processing. In modern smart devices, card readers are usually used to read media storing sensitive information such as smart cards, bank cards or ID cards, and the existence of security modules ensures that such information will not be tampered with or stolen during transmission or operation.

Security modules usually include hardware and software parts. The hardware part provides physical protection and encryption capability through encryption chip and secure storage unit; The software part is responsible for identity authentication, data encryption and decryption, signature verification and other operations. For example, in the financial payment scenario, the security module will protect the transaction data through key encryption technology, while verifying the legitimacy of the transaction through digital signatures to avoid fraud.

In addition, safety modules usually follow international safety standards (such as ISO 7816 or FIPS 140-2) to ensure that their design and implementation meet stringent safety requirements. Thanks to these technologies, the security module in the card reader provides a reliable security guarantee for identity identification and financial transactions in modern digital life.