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:
- 14:0962f818bf7f
- Parent:
- 11:aeaa77b488c0
- Child:
- 17:41be4896ed6d
--- a/SensorNode.cpp Fri May 27 11:47:20 2016 -0500 +++ b/SensorNode.cpp Mon Jun 06 10:49:15 2016 -0500 @@ -86,7 +86,7 @@ // Calculate secret if (result) { - result = (DS28E15_22_25::computeNextSecret(ds2465, pageData, authData.pageNum, scratchpad, ds28e15_22_25.romId, ds28e15_22_25.manId) == ISha256MacCoproc::Success); + result = (DS28E15_22_25::computeNextSecret(ds2465, pageData, authData.pageNum, scratchpad, ds28e15_22_25.romId(), ds28e15_22_25.manId()) == ISha256MacCoproc::Success); } return result; } @@ -148,7 +148,7 @@ return false; // Compute expected MAC DS28E15_22_25::Mac controllerMac; - if (DS28E15_22_25::computeAuthMac(ds2465, pageData, authData.pageNum, challenge, ds28e15_22_25.romId, ds28e15_22_25.manId, controllerMac) != ISha256MacCoproc::Success) + if (DS28E15_22_25::computeAuthMac(ds2465, pageData, authData.pageNum, challenge, ds28e15_22_25.romId(), ds28e15_22_25.manId(), controllerMac) != ISha256MacCoproc::Success) return false; // Check if authentic return (nodeMac == controllerMac); @@ -204,8 +204,10 @@ ds2465.OWSetSpeed(DS2465::OverdriveSpeed); - if (ds2465.OWReadRom(ds28e15_22_25.romId) != OneWireMaster::Success) + RomId romId; + if (ds2465.OWReadRom(romId) != OneWireMaster::Success) return UnableToCommunicate; + ds28e15_22_25.setRomId(romId); if (!checkProvisioned(provisioned)) return UnableToCommunicate;