When choosing between the three 13.56 MHz RFID chip—MIFARE, DESFire, and ICODE—you should first consider the specific application of the card, rather than focusing solely on the fact that they all operate at 13.56 MHz. In procurement, the term “MIFARE” typically refers to MIFARE Classic, while DESFire itself is a higher-security branch of NXP’s MIFARE […]

To avoid duplicate credential IDs on a 125kHz proximity card, simply printing different numbers on the card surface is not enough. First, define the credential format used by the access control system and assign non-overlapping ID ranges. Then encode each card using a controlled production database. Before writing data, we must verify the uniqueness of […]

When selecting a contact card chip, consider two key questions: How much data does the card need to store? What level of protection do these data or credentials require? These two requirements point to different types of chips. Simply defaulting to the chip with the largest storage capacity or the highest security level is often […]

The EM4200 cards do not require a dedicated reader manufactured specifically for the EM4200 chip. In most applications, any reader that supports the EM4200 or its compatible EM4100/EM4102 communication formats and operates at 125 kHz can read the card. This compatibility is a key advantage of the EM4200. When designing this chip, EM Microelectronic positioned […]

The SLE4428 smart card can certainly serve as an access control credential—provided the access control system is compatible with its security model and contact-based operation. The SLE4428 is not a microprocessor-based smart card with advanced encryption and authentication capabilities, but rather a contact-based card; Its core configuration includes 1 KB of EEPROM storage, irreversible byte-level […]