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MediaFutures Seminar: Platform provenance analysis for digital images. Assistant Prof. Cecilia Pasquini.
26 November, 2021 @ 12:00 - 13:00
Cecilia Pasquini, Assistant Professor at the University of Trento, Italy, will give a seminar on 26 November, at 12:00.
TITLE: Platform provenance analysis for digital images.
WHEN: Friday 26 November, 12:00-13:00
Meeting ID: 614 6382 9083
Password: 65UPcP4H
ABSTRACT:
The forensic analysis of image and video data that have been shared through social networks entails significant technological challenges. In fact, during the (possibly multiple) uploading processes, sharing platforms typically apply on the data routine operations such as recompression and resizing, so to reduce memory and bandwidth requirements. While this implies a degradation of the visual information that hinders, for instance, the possibility to identify the acquisition device, it has been observed that the transition through different social media platforms leave distinctive patterns on the data.By characterising those patterns at both signal and metadata-level, information on previous sharing operations can be extracted, thus possibly enabling a backward reconstruction of the sharing path of the visual data under analysis. This talk will report recent evidences in this direction and opportunities for provenance analysis on shared digital images.
BIO:
Cecilia Pasquini received her PhD in 2016 from the University of Trento, Italy. From 2016 to 2020, she has been a Postdoctoral Fellow at the Privacy and Security Lab with the Universität Innsbruck, Austria, and at the IT Security Lab at the University of Münster, Germany. In 2013, she was visiting PhD student at the University of Vigo, Spain. Prior to that, she received a BS and MS degree in Mathematics from the University of Ferrara, Italy, in 2010 and 2012.Her research area lies at the intersection of multimedia signal processing and information security, with special focus on image and video forensics, multimedia security, adversarial signal processing and machine learning. She has participated in several projects on these topics, such as UNCHAINED (funded by DARPA), PREMIER (funded by MIUR), ITBDIF (funded by Deutsche Forschungsgemeinschaft), J-MDS, NOTIS, ECMSF (funded by EUREGIO). She has been General Co-Chair of the ACM Workshop on Information Hiding & Multimedia Security 2018, and co-organizer of the special session “Information Security meets Adversarial Examples” at IEEE WIFS 2019. She is member of the Technical Program Committee of several conferences and workshops (e.g., ACM IH&MMSec, IEEE WIFS, IEEE ICASSP, EUSIPCO), serves as reviewer for many journals (e.g., IEEE TIFS, IEEE TCSVT, IEEE TIP) and as Associate Editor for the EURASIP Journal on Information Security. She is an elected member of the EURASIP BForSec Technical Area Committee. She received the Top 10% paper award (IEEE International Workshop on Multimedia Signal Processing 2013) and the “F. Carassa” GTTI 2015 award for the best ongoing PhD.