MAXREFDES143#: DeepCover Embedded Security in IoT Authenticated Sensing & Notification
Dependencies: MaximInterface mbed
The MAXREFDES143# is an Internet of Things (IoT) embedded security reference design, built to protect an industrial sensing node by means of authentication and notification to a web server. The hardware includes a peripheral module representing a protected sensor node monitoring operating temperature and remaining life of a filter (simulated through ambient light sensing) and an mbed shield representing a controller node responsible for monitoring one or more sensor nodes. The design is hierarchical with each controller node communicating data from connected sensor nodes to a web server that maintains a centralized log and dispatches notifications as necessary. The mbed shield contains a Wi-Fi module, a DS2465 coprocessor with 1-Wire® master function, an LCD, LEDs, and pushbuttons. The protected sensor node contains a DS28E15 authenticator, a DS7505 temperature sensor, and a MAX44009 light sensor. The mbed shield communicates to a web server by the onboard Wi-Fi module and to the protected sensor node with I2C and 1-Wire. The MAXREFDES143# is equipped with a standard shield connector for immediate testing using an mbed board such as the MAX32600MBED#. The simplicity of this design enables rapid integration into any star-topology IoT network requiring the heightened security with low overhead provided by the SHA-256 symmetric-key algorithm.
More information about the MAXREFDES143# is available on the Maxim Integrated website.
Diff: SensorNode.cpp
- Revision:
- 25:37ea43ff81be
- Parent:
- 20:cdba71cb5506
- Child:
- 30:0784010d6975
--- a/SensorNode.cpp Wed Oct 19 13:23:41 2016 -0500 +++ b/SensorNode.cpp Fri Dec 16 10:47:34 2016 -0600 @@ -32,7 +32,7 @@ */ #include "SensorNode.hpp" -#include "common.hpp" +#include "SensorData.hpp" #include "Masters/DS2465/DS2465.h" #include "RomId/RomCommands.h" #include "I2C.h" @@ -82,9 +82,9 @@ DS28E15_22_25::Page pageData; // Create constant partial secret - std::memset(scratchpad, defaultPaddingByte, scratchpad.length); + scratchpad.fill(uint8_t(defaultPaddingByte)); // Read page data - bool result = (ds2465.readMemory(DS2465::UserMemoryPage0, pageData, pageData.length, false) == OneWireMaster::Success); + bool result = (ds2465.readMemory(DS2465::UserMemoryPage0, pageData.data(), pageData.size(), false) == OneWireMaster::Success); // Calculate secret if (result) { @@ -132,7 +132,7 @@ #else std::srand(userEntropy); #endif - for (size_t i = 0; i < challenge.length; i++) + for (size_t i = 0; i < challenge.size(); i++) { #ifdef TARGET_MAX32600 challenge[i] = MXC_TPU->prng_rnd_num;