noxet/squidward

A research project at Lund University investigating IoT protocols with added security

squidward

A research project at Lund University investigating IoT protocols and the energy cost of added security. The protocols analyzed are CoAP and MQTT with and without (D)TLS, using both PSK and PKI.

Applications for different tests are located in the src folder.

Set up

Install ESP32 SDK

Follow the ESP32 "Get Started" guide and install IDF version 3.3.

Set the environment variable SQUIDWARD_PATH to point to the root folder of this repo.

Install Patches

To support DTLS in the stable branch, some files need to be patched, as described next.

In the $IDF_PATH/components/coap/libcoap folder, checkout a newer version of the library by running

git checkout 98954eb.

In the $IDF_PATH/components/coap/libcoap/ext/tinydtls folder run

git checkout 7f8c86e.

Copy patch/libcoap/coap_io.c and replace $IDF_PATH/components/coap/libcoap/src/coap_io.c.

Copy all files and folders in patch/coap and replace the files in $IDF_PATH/components/coap.

Copy patch/mbedtls/esp_timing.c to $IDF_PATH/components/mbedtls/port/.

Build

Running make builds in the top folder will generate all configured binary files. To generate binaries for a specific application, run make builds inside an application folder in src.

squidward's Issues

Setup ESP32 client server with Wifi

Set up CoAP over DTLS

UART for annotation

Set up UART (as a lib?) in order to send annotation data to the Otii device

Setup a client server network for Coap

Setup a server and connect some clients to it and try to do the actual update and measure the energy consumption under different settings.

Set up CoAP over DTLS using mbedTLS

• Set up DTLS with mbedTLS
• Change cipher suites
• Use libcoap as external library to parse CoAP packets

DTLS support must be enabled in menuconfig when compiling.
This is done on the current stable branch (v3.3)

Setup different cipher suites for tinydtls

Investigate sleep mode

Analyze the different sleep modes for ESP32, in order to test TLS session resumption

Setup MQTT with TLS on ESP32

Setup MQTT over TCP

Setup secure MQTT with TLS

Simple FOTA

• Set up FOTA using basic example
• Set up CoAP
• Get FOTA updates over CoAP

Implement Oscore for esp32

Implement and test Oscore on esp32, and do the actual update with oscore as well.

Measure energy consumption in oscore.
Compare the results with coap+dtls

VM for retransmission

Set up a VM to simulate packet loss, check with papers

CoAP(s) testbench

Set up a testbench suite to be used with CoAP, both with and without security.
Check with papers for real-world simulations