IoT reference design speeds development of authenticated data chains

IoT reference design speeds development of authenticated data chains

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By Jean-Pierre Joosting

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 ideal 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; as well as alarm and logging functions. The sensor node contains a DS28E15 secure authenticator, DS7505 temperature sensor, and MAX44009 light sensor.

The reference design delivers fast time-to-market, significantly reducing development time using the provided hardware and source code to implement an authenticated node solution and web server interface. A free evaluation web server provides an immediate out-of-the box implementation for real-time data collection and storage of sensor data. The SHA-256 coprocessor offloads the data authentication task and securely stores the node authentication key. Each node has a unique key.

“The reference design is a powerful, much-needed tool for addressing the genuine issues of data security and authentication for Industrial IoT installations,” said Scott Jones, Executive Director, Embedded Security, Maxim Integrated. “The reference design combines the shield and sensor node to offer a solution with a high level of security and minimal development start-up effort, and with low system-overhead burden.”

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