137 research outputs found
Privacy Intelligence: A Survey on Image Sharing on Online Social Networks
Image sharing on online social networks (OSNs) has become an indispensable
part of daily social activities, but it has also led to an increased risk of
privacy invasion. The recent image leaks from popular OSN services and the
abuse of personal photos using advanced algorithms (e.g. DeepFake) have
prompted the public to rethink individual privacy needs when sharing images on
OSNs. However, OSN image sharing itself is relatively complicated, and systems
currently in place to manage privacy in practice are labor-intensive yet fail
to provide personalized, accurate and flexible privacy protection. As a result,
an more intelligent environment for privacy-friendly OSN image sharing is in
demand. To fill the gap, we contribute a systematic survey of 'privacy
intelligence' solutions that target modern privacy issues related to OSN image
sharing. Specifically, we present a high-level analysis framework based on the
entire lifecycle of OSN image sharing to address the various privacy issues and
solutions facing this interdisciplinary field. The framework is divided into
three main stages: local management, online management and social experience.
At each stage, we identify typical sharing-related user behaviors, the privacy
issues generated by those behaviors, and review representative intelligent
solutions. The resulting analysis describes an intelligent privacy-enhancing
chain for closed-loop privacy management. We also discuss the challenges and
future directions existing at each stage, as well as in publicly available
datasets.Comment: 32 pages, 9 figures. Under revie
Towards Robust GAN-generated Image Detection: a Multi-view Completion Representation
GAN-generated image detection now becomes the first line of defense against
the malicious uses of machine-synthesized image manipulations such as
deepfakes. Although some existing detectors work well in detecting clean, known
GAN samples, their success is largely attributable to overfitting unstable
features such as frequency artifacts, which will cause failures when facing
unknown GANs or perturbation attacks. To overcome the issue, we propose a
robust detection framework based on a novel multi-view image completion
representation. The framework first learns various view-to-image tasks to model
the diverse distributions of genuine images. Frequency-irrelevant features can
be represented from the distributional discrepancies characterized by the
completion models, which are stable, generalized, and robust for detecting
unknown fake patterns. Then, a multi-view classification is devised with
elaborated intra- and inter-view learning strategies to enhance view-specific
feature representation and cross-view feature aggregation, respectively. We
evaluated the generalization ability of our framework across six popular GANs
at different resolutions and its robustness against a broad range of
perturbation attacks. The results confirm our method's improved effectiveness,
generalization, and robustness over various baselines.Comment: Accepted to IJCAI 202
Machine Unlearning: A Survey
Machine learning has attracted widespread attention and evolved into an
enabling technology for a wide range of highly successful applications, such as
intelligent computer vision, speech recognition, medical diagnosis, and more.
Yet a special need has arisen where, due to privacy, usability, and/or the
right to be forgotten, information about some specific samples needs to be
removed from a model, called machine unlearning. This emerging technology has
drawn significant interest from both academics and industry due to its
innovation and practicality. At the same time, this ambitious problem has led
to numerous research efforts aimed at confronting its challenges. To the best
of our knowledge, no study has analyzed this complex topic or compared the
feasibility of existing unlearning solutions in different kinds of scenarios.
Accordingly, with this survey, we aim to capture the key concepts of unlearning
techniques. The existing solutions are classified and summarized based on their
characteristics within an up-to-date and comprehensive review of each
category's advantages and limitations. The survey concludes by highlighting
some of the outstanding issues with unlearning techniques, along with some
feasible directions for new research opportunities
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