The increasing number of IoT devices used in today’s society has led to a demand for better security in order to prevent attackers from gaining access to private information. The IoT brings a wide application scope and because of that there are a lot of ways to set up a secure network and manage keys in these kinds of networks. This paper presents a comparison between the security model in Zigbee and the new recommended practice for Key Management Protocols defined by the IEEE 802.15.9 standard. We investigate key establishment and transportation together with the vulnerabilities that this might bring regarding potential attacks like DoS and MitM. Since these protocols are built on the IEEE 802.15.4 standard, experimental tests have been made where we analyze the throughput, RTT and packet loss over varied distances and we try to determine the maximum transmission range for devices using IEEE 802.15.4 modules. The IEEE 802.15.9 standard works with different KMPs and depending on the KMP being used we can see both similarities and differences regarding key management and possible attacks when comparing it to ZigBee. Furthermore, we found that attacks on a ZigBee device is more likely to compromise the whole network while similar attacks would only affect the specific peers in an IEEE 802.15.9 communication. Based on the experiments we find that open areas, distance and interference have a negative effect on the throughput, RTT and packet loss of the communication.

Made available in DSpace on 2014-12-17T14:55:40Z (GMT). No. of bitstreams: 1 JoseMF.pdf: 585000 bytes, checksum: d743090da952a3d8b178ffb4048abd4b (MD5) Previous issue date: 2009-12-16 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / RFID (Radio Frequency Identification) identifies object by using the radio frequency which is a non-contact automatic identification technique. This technology has shown its powerful practical value and potential in the field of manufacturing, retailing, logistics and hospital automation. Unfortunately, the key problem that impacts the application of RFID system is the security of the information. Recently, researchers have demonstrated solutions to security threats in RFID technology. Among these solutions are several key management protocols. This master dissertations presents a performance evaluation of Neural Cryptography and Diffie-Hellman protocols in RFID systems. For this, we measure the processing time inherent in these protocols. The tests was developed on FPGA (Field-Programmable Gate Array) platform with Nios IIr embedded processor. The research methodology is based on the aggregation of knowledge to development of new RFID systems through a comparative analysis between these two protocols. The main contributions of this work are: performance evaluation of protocols (Diffie-Hellman encryption and Neural) on embedded platform and a survey on RFID security threats. According to the results the Diffie-Hellman key agreement protocol is more suitable for RFID systems / Identifica??o por r?dio freq??ncia, tamb?m chamada de RFID (Radio Frequency Identification), representa uma tecnologia de transmiss?o de dados sem fio. Estes dados s?o relacionados principalmente a c?digos de identifica??o. A tecnologia RFID vem apresentando um grande potencial de utiliza??o em setores da automa??o industrial, residencial e hospitalar. No entanto, estas aplica??es podem resultar em riscos a seguran?a e privacidade dos usu?rios. Recentemente, pesquisadores v?m apresentando poss?veis solu??es as amea?as de seguran?a da tecnologia. Entre estas solu??es est?o os protocolos de distribui??o de chaves criptogr?ficas. O presente trabalho tem como objetivo realizar uma avalia??o de desempenho dos protocolos de Criptografia Neural e Diffie-Hellman na gera??o de chaves em sistemas RFID. Para isso, iremos mensurar o tempo de processamento destes protocolos. Para os testes foi desenvolvido uma plataforma em FPGA (Field-Programmable Gate Array) com o processador embarcado Nios IIr. Sobre esta plataforma foram utilizados os protocolos de Criptografia Neural e Diffie-Hellman no processo de gera??o de chaves criptogr?ficas. A metodologia de pesquisa baseia-se na agrega??o de conhecimento ao desenvolvimento de novos sistemas RFID atrav?s de uma an?lise comparativa entre esses dois protocolos de seguran?a da informa??o. As principais contribui??es deste trabalho s?o: avalia??o de desempenho dos protocolos (Diffie- Hellman e Criptografia Neural) em uma plataforma embarcada e um levantamento bibliogr?fico de pesquisas relacionadas ? seguran?a da informa??o em sistemas RFID. Nos resultados obtidos foi poss?vel observar que o protocolo de Diffie-Hellman ? mais apropriado para sistemas RFID