CoAP over DTLS TinyOS Implementation and Performance Analysis. Implementazione di CoAP e DTLS in TinyOS ed analisi delle prestazioni

La tesi presenta un’applicazione che integra i protocolli DTLS, CoAP e lo stack IPv6/6LoWPAN, basata su implementazioni sviluppate dal SIGNET Group del Dipartimento di Ingegneria dell’Informazione di Padova. In secondo luogo viene presentata una serie di esperimenti con lo scopo di valutare la variazione di performance dovuta alle operazioni di sicurezza del protocollo DTLS. Tale variazione sarà valutata in termini di memoria ed energia richiesta, ritardi e overhead nei pacchett

Performance Evaluation of end-to-end security protocols in an Internet of Things

Wireless Sensor Networks are destined to play a fundamental role in the next-generation Internet, which will be characterized by the Machine-to-Machine paradigm, according to which, embedded devices will actively exchange information, thus enabling the development of innovative applications. It will contribute to assert the concept of Internet of Things, where end-to-end security represents a key issue. In such context, it is very important to understand which protocols are able to provide the right level of security without burdening the limited resources of constrained networks. This paper presents a performance comparison between two of the most widely used security protocols: IPSec and DTLS. We provide the analysis of their impact on the resources of embedded devices. For this purpose, we have modified existing implementations of both protocols to make them properly run on our hardware platforms, and we have performed an extensive experimental evaluation study. The achieved results are not a consequence of a classical simulation campaign, but they have been obtained in a real scenario that uses software and hardware typical of the current technological developments. Therefore, they can help network designers to identify the most appropriate secure mechanism for end-to-end IP communications involving constrained devices

IoT Content Object Security with OSCORE and NDN: A First Experimental Comparison

The emerging Internet of Things (IoT) challenges the end-to-end transport of the Internet by low power lossy links and gateways that perform protocol translations. Protocols such as CoAP or MQTT-SN are degraded by the overhead of DTLS sessions, which in common deployment protect content transfer only up to the gateway. To preserve content security end-to-end via gateways and proxies, the IETF recently developed Object Security for Constrained RESTful Environments (OSCORE), which extends CoAP with content object security features commonly known from Information Centric Networks (ICN). This paper presents a comparative analysis of protocol stacks that protect request-response transactions. We measure protocol performances of CoAP over DTLS, OSCORE, and the information-centric Named Data Networking (NDN) protocol on a large-scale IoT testbed in single- and multi-hop scenarios. Our findings indicate that (a) OSCORE improves on CoAP over DTLS in error-prone wireless regimes due to omitting the overhead of maintaining security sessions at endpoints, and (b) NDN attains superior robustness and reliability due to its intrinsic network caches and hop-wise retransmissions

Security for the signaling plane of the SIP protocol

VOIP protocols are gaining greater acceptance amongst both users and service providers. This thesis will aim to examine aspects related to the security of signaling plane of the SIP protocol, one of the most widely used VOIP protocols. Firstly, I will analyze the critical issues related to SIP, then move on to discuss both current and possible future solutions, and finally an assessment of the impact on the performance of HTTP digest authentication, IPsec and TLS, the three main methods use