Journal
IEEE TRANSACTIONS ON NETWORK AND SERVICE MANAGEMENT
Volume 18, Issue 4, Pages 4225-4246Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TNSM.2021.3098157
Keywords
Artificial intelligence; Deep learning; Calibration; Tools; Computer architecture; Analytical models; Mobile applications; Traffic classification; encrypted traffic; explainable artificial intelligence; deep learning; multimodal learning
Categories
Funding
- Italian Research Program PON AIM Attraction and International Mobility, Azione I.2 Linea 1, Mobilita dei Ricercatori [AIM1878982-2 CUP E56C19000330005]
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The proliferation of mobile devices has altered the network traffic landscape, leading to new challenges in traffic classification. While Deep Learning has emerged as a solution to enhance performance compared to traditional machine learning techniques, its black-box nature hinders practical adoption in critical scenarios. Explainable Artificial Intelligence techniques have gained recent interest for providing global interpretations in contrast to sample-based ones.
The increasing diffusion of mobile devices has dramatically changed the network traffic landscape, with Traffic Classification (TC) surging into a fundamental role while facing new and unprecedented challenges. The recent and appealing adoption of Deep Learning (DL) techniques has risen as the solution overcoming the performance of ML techniques based on tedious and time-consuming handcrafted feature design. Still, the black-box nature of DL models prevents its practical and trustful adoption in critical scenarios where the reliability/interpretation of results/policies is of key importance. To cope with these limitations, eXplainable Artificial Intelligence (XAI) techniques have recently acquired the interest of the community. Accordingly, in this work we investigate trustworthiness and interpretability via XAI-based techniques to understand, interpret and improve the behavior of state-of-the-art multimodal DL traffic classifiers. The proposed methodology, as opposed to common results seen in XAI, attempts to provide global interpretation, rather than sample-based ones. Results, based on an open dataset, allow to complement the above findings with domain knowledge.
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