Sigurna komunikacija krajnjih uređaja u Internetu stvari

master's thesis

• Title (english): Internet of Things Secure End Device Communication
• Author: Ante Breščić
• Mentor: Mario Kušek (mentor)
• Committee member: Mario Kušek (predsjednik povjerenstva)
• Committee member: Ivana Podnar Žarko (član povjerenstva)
• Committee member: Gordan Ježić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2018-07-06, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing

Abstract

U ovom diplomskom radu analizirani su algoritmi i protokoli korišteni u sigurnoj komunikaciji krajnjih uređaja u Internetu stvari. Prvi dio rada donosi teorijsku podlogu navedenog problema i rješenja koje se trenutno koriste u tu svrhu. Opisane su sigurnosne prijetnje i mehanizmi za njihovo otklanjanje. Navedeni su trenutno korišteni načini sigurne komunikacije u Internetu stvari.
U drugom dijelu rada realizirane su dvije implementacije sigurne komunikacije između posredničke platforme Node-RED i mikrokontrolera ESP32. Jedna verzija realizirana je s ESP32 mikrokontrolerom kao poslužiteljem koji osluškuje HTTP zahtjeve poslane s Node-RED klijenta, obrađuje ih i šalje odgovor. Druga verzija sadrži MQTT broker kao središnju komponentu sustava i realizira sustav objava-pretplata, dok se Node-RED i ESP32 klijenti pretplaćuju na teme i razmjenjuju poruke posredstvom brokera. Također, opisan je postupak generiranja sigurnosnog certifikata korištenog u obje realizirane verzije.

Abstract (english)

In this graduate thesis, the algorithms and protocols used in the secure communication of end devices in the Internet of Things are analyzed. The first part of the paper presents the theoretical background of the problem and the solutions currently used for this purpose. Security threats and their removal mechanisms are described. The most currently used algorithms of securing the communication in Internet of Things are presented.
In the second part of the work, two implementations of secure communication between the Node-RED platform and the ESP32 microcontroller have been implemented. One version was implemented with an ESP32 microcontroller as a server that is listening to the HTTP requests sent from the Node-RED client, processing and sending the response. The second version includes the MQTT broker as the central component of the system and executes the publish-subscribe pattern, while Node-RED and ESP32 clients subscribe to topics and exchange messages through a broker. Also, the procedure for generating an SSL certificate used in both realized versions is described.

• Keywords: Internet stvari; sigurna komunikacija; ESP32; Node-RED; pametna kuća; SSL; HTTPS; MQTT
• Keywords (english): Internet of Things; Secure Communication; ESP32; Node-RED; Smart Home; SSL; HTTPS; MQTT
• Language: croatian
• URN:NBN: urn:nbn:hr:168:191880
• Study programme: Title: Computing; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka računarstva (magistar/magistra inženjer/inženjerka računarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2019-03-13 19:19:34