The reference design’s sophisticated architecture and components, Arduino-compatible hardware interface, and ARM mbed libraries support simplifies development of secure, uncorrupted, and authenticated sensor-to-web data. It is well suited for analog sensor node and data authentication in factory automation and industrial processing applications.
The reference design’s two-stage hierarchical architecture consists of a shield that communicates to a web server, and a protected sensor node for data acquisition and authentication. The shield includes a Wi-Fi module; a DS2465 secure coprocessor for offloading SHA-256 cryptographic computation; 1-Wire® and I²C interfaces; user-interface LCD, LEDs, and pushbuttons; along with alarm and logging functions. The sensor node contains a DS28E15 secure authenticator, DS7505 temperature sensor, and MAX44009 light sensor.
A free evaluation web server provides an immediate out-of-the box implementation for real-time data collection and storage of sensor data. The device’s SHA-256 coprocessor offloads data authentication task; securely stores node authentication key; each node has a unique key.
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