8,977 research outputs found
The Viability and Potential Consequences of IoT-Based Ransomware
With the increased threat of ransomware and the substantial growth of the Internet of Things (IoT) market, there is significant motivation for attackers to carry out IoT-based ransomware campaigns. In this thesis, the viability of such malware is tested.
As part of this work, various techniques that could be used by ransomware developers to attack commercial IoT devices were explored. First, methods that attackers could use to communicate with the victim were examined, such that a ransom note was able to be reliably sent to a victim. Next, the viability of using "bricking" as a method of ransom was evaluated, such that devices could be remotely disabled unless the victim makes a payment to the attacker. Research was then performed to ascertain whether it was possible to remotely gain persistence on IoT devices, which would improve the efficacy of existing ransomware methods, and provide opportunities for more advanced ransomware to be created. Finally, after successfully identifying a number of persistence techniques, the viability of privacy-invasion based ransomware was analysed.
For each assessed technique, proofs of concept were developed. A range of devices -- with various intended purposes, such as routers, cameras and phones -- were used to test the viability of these proofs of concept. To test communication hijacking, devices' "channels of communication" -- such as web services and embedded screens -- were identified, then hijacked to display custom ransom notes. During the analysis of bricking-based ransomware, a working proof of concept was created, which was then able to remotely brick five IoT devices. After analysing the storage design of an assortment of IoT devices, six different persistence techniques were identified, which were then successfully tested on four devices, such that malicious filesystem modifications would be retained after the device was rebooted. When researching privacy-invasion based ransomware, several methods were created to extract information from data sources that can be commonly found on IoT devices, such as nearby WiFi signals, images from cameras, or audio from microphones. These were successfully implemented in a test environment such that ransomable data could be extracted, processed, and stored for later use to blackmail the victim.
Overall, IoT-based ransomware has not only been shown to be viable but also highly damaging to both IoT devices and their users. While the use of IoT-ransomware is still very uncommon "in the wild", the techniques demonstrated within this work highlight an urgent need to improve the security of IoT devices to avoid the risk of IoT-based ransomware causing havoc in our society. Finally, during the development of these proofs of concept, a number of potential countermeasures were identified, which can be used to limit the effectiveness of the attacking techniques discovered in this PhD research
Learning disentangled speech representations
A variety of informational factors are contained within the speech signal and a single short recording of speech reveals much more than the spoken words. The best method to extract and represent informational factors from the speech signal ultimately depends on which informational factors are desired and how they will be used. In addition, sometimes methods will capture more than one informational factor at the same time such as speaker identity, spoken content, and speaker prosody.
The goal of this dissertation is to explore different ways to deconstruct the speech signal into abstract representations that can be learned and later reused in various speech technology tasks. This task of deconstructing, also known as disentanglement, is a form of distributed representation learning. As a general approach to disentanglement, there are some guiding principles that elaborate what a learned representation should contain as well as how it should function. In particular, learned representations should contain all of the requisite information in a more compact manner, be interpretable, remove nuisance factors of irrelevant information, be useful in downstream tasks, and independent of the task at hand. The learned representations should also be able to answer counter-factual questions.
In some cases, learned speech representations can be re-assembled in different ways according to the requirements of downstream applications. For example, in a voice conversion task, the speech content is retained while the speaker identity is changed. And in a content-privacy task, some targeted content may be concealed without affecting how surrounding words sound. While there is no single-best method to disentangle all types of factors, some end-to-end approaches demonstrate a promising degree of generalization to diverse speech tasks.
This thesis explores a variety of use-cases for disentangled representations including phone recognition, speaker diarization, linguistic code-switching, voice conversion, and content-based privacy masking. Speech representations can also be utilised for automatically assessing the quality and authenticity of speech, such as automatic MOS ratings or detecting deep fakes. The meaning of the term "disentanglement" is not well defined in previous work, and it has acquired several meanings depending on the domain (e.g. image vs. speech). Sometimes the term "disentanglement" is used interchangeably with the term "factorization". This thesis proposes that disentanglement of speech is distinct, and offers a viewpoint of disentanglement that can be considered both theoretically and practically
The Disputation: The Enduring Representations in William Holman Hunt's âThe Finding of the Saviour in the Temple,â 1860
This interdisciplinary thesis problematizes the Jewish presence in the painting The Finding of the Saviour in the Temple (1860) by William Holman Hunt. This âJewish presenceâ refers to characters within the painting, Jews who posed for the picture and the paintingâs portrayal of Judaism. The thesis takes a phenomenological and hermeneutical approach to The Finding providing careful description and interpretation of what appears in the painting. It situates the painting within a newly configured genre of disputation paintings depicting the Temple scene from the Gospel of Luke (2:47 â 52). It asks two questions. Why does The Finding look the way it does? And how did Holman Hunt know how to create the picture? Under the rubric of the first question, it explores and challenges customary accounts of the painting, explicitly challenging the over reliance upon F.G. Stephensâs pamphlet. Additionally, it examines Pre-Raphaelite and Victorian religious contexts and bringing hitherto unacknowledged artistic contexts to the fore. The second question examines less apparent influences through an analysis of the originary Lukan narrative in conjunction with the under-examined genre of Temple âdisputationâ paintings, and a legacy of scholarly and religious disputation. This demonstrates a discourse of disputation informing The Finding over and above the biblical narrative. In showing that this discourse strongly correlates with the paintingâs objectifying and spectacular properties, this thesis provides a new way to understand The Findingâs orientalism which is further revealed in its typological critical reworking of two Christian medieval and renaissance paintings. As a demonstration of the discourse, the thesis includes an examination of Jewish artists who addressed the theme of disputation overtly or obliquely thereby engaging with and challenging the assumptions upon which the disputation rests
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An Agile Musicology: Improvisation in Corporate Management and Lean Startups
The last decade of the twentieth century saw a proliferation of publications that use jazz as a metaphor for corporate management, arguing that in the contemporary knowledge economy, jazz is superior to the symphonic model that governed mid-century factory floors. As the literature on the jazz metaphor, and organizational improvisation more broadly, continued to develop into the twenty-first century, another managerial methodology became widely adopted by entrepreneurs: agile. While agile is yet to be fully theorized as an improvisatory practice, agile shares several core tenets with the models promoted by organizational improvisation scholars, including the use of small teams, an emphasis on feedback, and an openness to change. In this dissertation, I argue that agile methods, and the adjacent lean methodology, are inherently improvisatory and that understanding them as improvisatory offers opportunities not only for their deployment within growing businesses, but also for adoption at-scale in large corporations.
I draw on an array of disciplinary perspectives, including management science, organizational studies, musicology, and critical improvisation studies, as well as a wide range of sources, from peer-reviewed journal publications to trade manuals. Each chapter builds upon the former: a substantial and critical review of the jazz metaphor literature is followed by a dissection of its main themes under a musicological lens; after securing the foundations of organizational improvisation, the next chapter reveals the improvisatory nature of agile and lean startup practices and links them to concepts discussed within the jazz metaphor literature. Drawing on insights from large-scale improvisatory musical practices, the final chapter reveals how improvisation, as a set of practices shared between corporate management and agile methodologies, provides avenues for agile to be scaled up as startups grow or for its widespread adoption within established companies
Translating erasure: Proposing auto-theory as a practice for artistic enquiry and analysis while comprehending personal grief
Erasure as an artistic technique has developed in my moving image work after my father's passing. I export videos into sequences of thousands of images and erase outlines of the targeted objects in each frame. The repetitive and low conscious labour is a way to ease the agony and to grieve my father. Hours compressed into thousands of frames, turning into a glimpse of illusion and leaving a ghostly emptiness on the images. Both its visual presentation and making reflect the life events and encounters I've experienced in the UK and Taiwan in the past years.
I consider an artwork embodies interconnected relationships between one's personal impulses and artistic training. As an art student, I have found it challenging to describe such a creative process with conventional academic writing. Within a construct that inclines to present thoughts as reasonable and rational arguments, my personal experiences and the intensity of feeling seem out of place. Within an academic framework, how can I make an argument out of how I have developed the erasure in my artwork to perform the grief, fading memories of a loved one, existential crisis and what's in-between?
Through auto-theoretical approaches to writing and making of moving image work, this research aims to build a structure that can express both the intimate and intellectual aspects of an art practice. This writing up process interweaves my personal stories that motivate my artistic expression into art theories. The memories about my late father, my relationship with languages, and my lives between the UK and Taiwan meet with different artists' uses of erasure.
As the conversations between the introspections and theoretical analysis accumulate, my writing and moving image work unravel an art journey that encompasses the nuances and struggles I've experienced as an international student. Within the search for an ideal model to illustrate an art practice, this research further generates profound understandings of memory, grief, loss, language, conflicted identities and cultural belonging
The Adirondack Chronology
The Adirondack Chronology is intended to be a useful resource for researchers and others interested in the Adirondacks and Adirondack history.https://digitalworks.union.edu/arlpublications/1000/thumbnail.jp
Photography and Aesthetics: a critical study on visual and textual narratives in the lifework of Sergio LarraĂn and its impact in 20th century Europe and Latin America
The main focus of this study is a theoretical exploration of critical approaches applicable to the work of the Chilean photographer Sergio LarraĂn (1931-2012). It presents analytical tools to contextualise and understand the importance and impact of his work in photographic studies and his portrayal of twentieth-century Latin American and European culture. It inspects in depth a large portion of his photo work, which is still only partially published and mostly reduced to his "active" period as a photojournalist, aside from the personal photographic exploration of his early and late career (C. Mena). This extended material creates a broader scope for understanding his photographs and him as a canonical photographer. This study analyses the photographer's trajectory as discourses of recollection of historical memory in time (Mauad) to trace LarraĂn's collective memory associated with his visual production. Such analysis helps decode his visual imagery and his projection and impact on the European and Latin American culture. This strategy helps solve a two fold problem: firstly, it generates an interpretive consistency to understand the Chilean's photographic practice; secondly, it explores the power of images as an aesthetic experience in the installation of nationalist ideologies and the creation of imaginaries (B. Anderson 163)
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Multi-omics Characterisation of Myxoid Liposarcoma and Investigation of Trabectedin Mechanism of Action for Its Treatment
Myxoid liposarcoma (MLPS) is a rare soft tissue sarcoma of the mesenchymal cells characterised by the expression of the FUS-DDIT3 oncoprotein that impairs the adipocyte differentiation. Among the available therapeutic choices for the treatment of MLPS, trabectedin has shown significant anti-tumour activity. Although prolonged treatment is well-tolerated, recurrence of the resistant tumour invariably occurs even in initially responder patients. With the aim to characterise yet unknown molecular mechanisms of trabectedin mode of action and of resistance in MLPS, we integrated genomic, transcriptomic and protein-DNA binding data from patient-derived MLPS xenograft model, ML017, and its trabectedin-resistant derivate, ML017/ET.
DNA-Seq analysis showed that acquired-resistance to trabectedin may be due to the loss of genetic material in the 4p15.2, 4p16.3 and 17q21.3 cytobands and to the consequent inhibition of the genes mapping on these regions. Integration of longitudinal RNA-Seq and ChIP-Seq data revealed a two-phases mechanism of action of trabectedin. An early phase, characterised by the cytotoxic action of trabectedin and probably independent from FUS-DDIT3 activity; a second late phase, led by the DNA-binding activity of the chimera. Indeed, trabectedin displaces FUS-DDIT3 from most of its targets and modulates the transcription of the related genes involved in processes that sustain adipocyte differentiation. To note, no such differences were observed in ML017/ET resistant model.
These results shed light on the complex mechanism of action of trabectedin in MLPS. They provide insights into the process leading to drug resistance and can be the basis for the development of novel combinatorial strategies for the treatment of MLPS
The empty space in abstract photography: a psychoanalytical perspective
The aim of the research that this thesis is based on is to explore the theoretical problems raised by the concept of photographic abstraction. These consist in the tension between the two aspects of the photographic sign, the indexical and iconic, and are examined in the context of the particular exploration of the empty space in abstract photography which I have pursued through my practice. The investigation draws mainly upon the psychoanalytic theory of transitional phenomena as proposed by Winnicott, as well as other art theories (Deleuze & Guattari, Ehrenzweig, Fer, Fuller, Greenberg, Joselit, Kuspit, Leider, Worringer) of abstraction. It explores the relationship of the abstract photographic image to notions of exteriority and interiority as these relate to the transition from the unconscious to conscious reality. The development of this research suggests the psychoanalytical concept of potential space as a contribution to an aesthetic model of abstraction. This concept is employed as a methodological tool in the development of the practical work and creates a framework for its interpretation. The concept of potential space is based on Winnicott's ideas around "playing with the real" in an intermediate area of experience between the internal and external reality, where creativity originates as a zone of fictive play that facilitates the subject's journey from "what is subjectively conceived of' to "what is objectively perceived. " The outcome of this investigation constitutes the production of a series of photographs describing an empty abstract space, one that is invested with a psychic dimension that produces the effect of ambiguity between its representational and abstract readings. It provides a redefinition of abstraction in a space of tension between the iconic and indexical aspects of the sign and opens up the space of abstraction in photography as one in which the relationship between inner and outer reality can be performed and can become a space of action and intervention
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