Maxim Integrated / Mbed 2 deprecated DeepCover Embedded Security in IoT

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.

--- a/common.cpp	Wed Apr 20 20:13:33 2016 +0000
+++ b/common.cpp	Thu May 12 14:40:14 2016 -0500
@@ -33,9 +33,9 @@
 
 #include "common.hpp"
 
-const std::size_t charsPerByte = 2;
+const size_t charsPerByte = 2;
 
-std::string byteArrayToHexString(const std::uint8_t * byteArray, std::size_t byteArraySize)
+std::string byteArrayToHexString(const uint8_t * byteArray, size_t byteArraySize)
 {
   std::string hexString;
   hexString.reserve(byteArraySize * charsPerByte);
@@ -43,10 +43,10 @@
   return hexString;
 }
 
-void byteArrayToHexString(const std::uint8_t * byteArray, std::size_t byteArraySize, std::string & hexString)
+void byteArrayToHexString(const uint8_t * byteArray, size_t byteArraySize, std::string & hexString)
 {
   char hexBuf[charsPerByte + 1];
-  for (std::size_t i = 0; i < byteArraySize; i++)
+  for (size_t i = 0; i < byteArraySize; i++)
   {
     std::snprintf(hexBuf, (sizeof(hexBuf) / sizeof(hexBuf[0])), "%2.2X", byteArray[i]);
     hexString.append(hexBuf, charsPerByte);