Secure NFC/RFID Tag Authenticator with Energy Harvesting Protects Sensitive Data Transfer Between Master and Slave Devices

by donpedro

Designers can now perform secure wireless data communication on their embedded systems without needing the host microcontroller,

but by simply using a single MAX66242 DeepCover® Secure Authenticator from Maxim Integrated Products, Inc.
The MAX66242 secure authenticator is an advanced tag that combines a wireless NFC/RFID interface with an I2C interface. Designers can now collect vital system data from portable devices even when the main energy source on the master device is not functional.
The I2C and wireless RFID/NFC interfaces make it highly flexible and scalable for a wide range of applications. The MAX66242 is especially useful for applications that require additional external functionality, but do not have the space to place a connector. Ideal applications include secure, wireless transfer of medical data or asset tracking.
The MAX66242 enables wireless, contactless data collection between a host and slave device. The integrated, proven SHA-256 cryptographic engine provides symmetric challenge-and-response authentication based on a secret key for data downloads.
Needing no separate controller to write data, the MAX66242’s I2C interface port can operate as a master port or a slave port for secure data exchanges. The MAX66242 comes with multiple memory programmable options which let a user configure a secure master/slave system and set usage limits using the EEPROM emulation mode to create nonresettable counters. Designers can also use the MAX66242 to set up easy and intuitive WiFi® or Bluetooth® connections as a means to securely storing the pairing codes. It then provides security for access control, asset tracking, system alert/wakeup, and authentication of medical sensors for the secure transfer of personal data.

Maxim Integrated

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