Authentiction

Arduino can be used in authentication systems, especially with RFID and NFC modules. These modules allow user identification through smart cards or electronic tags. For example, the **RDM6300 RFID module** is a popular option for authentication, operating at **125 kHz** and capable of reading data from compatible tags. Another option is the **PN532 NFC module**, which is used for secure communication and data transfer over short distances.