This thesis explores the evolving landscape of digital forensics in the context of quantum computing advancements, which challenge the foundational integrity of digital evidence. The focus is on the globally recognized digital forensic guidelines, NIST SP 800-86 and ISO/IEC 27037:2012, and their capacity to safeguard evidence against the unique capabilities of quantum systems. This thesis identifies vulnerabilities within existing forensic models through a comprehensive document analysis and expert interviews and proposes strategic modifications to enhance their robustness. Key findings suggest that traditional digital forensic methodologies, while robust under current technological standards, must address quantum data’s multi-state, entanglement, and no-cloning properties, which can fundamentally alter digital evidence. The thesis advocates for a paradigm shift in forensic processes to incorporate quantum-resistant techniques that ensure the integrity and admissibility of evidence. Additionally, it highlights the necessity for ongoing education and collaborative research to effectively adapt digital forensics to this new technological era. This research contributes to the theoretical framework and practical applications of digital forensics, aiming to future-proof forensic practices against the disruptive nature of quantum computing.

Dans cette thèse, nous avons répondu à certaines questions ouverts dans le domaine de la dynamique hors équilibre des systèmes quantiques unidimensionnels fermés. Durant ces dernières années, les avancées dans les techniques expérimentales ont revitalisé la recherche théorique en physique de la matière condensée et dans l'optique quantique. Nous avons traité trois sujets différents et en utilisant des techniques à la fois numériques et analytiques. Dans le cadre des techniques numériques, nous avons utilisé des méthodes de diagonalisation exacte, l'algorithme du groupe de renormalisation de la matrice densité en fonction du temps (t-DMRG) et l'algorithme de Lanczos. Au début, nous avons étudié la dynamique quantique adiabatique d'un système quantique près d'un point critique. Nous avons démontré que la présence d'un potentiel de confinement modifie fortement les propriétés d'échelle de la dynamique des observables en proximité du point critique quantique. La densité d'excitations moyenne et l'excès d'énergie, après le croisement du point critique, suivent une loi algébrique en fonction de la vitesse de la trempe avec un exposant qui dépend des propriétés spatio-temporelles du potentiel. Ensuite, nous avons étudié le comportement de bosons ultra-froids dans un réseau optique incliné. En commençant par l'hamiltonien de Bose-Hubbard, dans la limite de Hard-Core bosons, nous avons développé une théorie hydrodynamique qui reproduit exactement l'évolution temporelle d'une partie des observables du système. En particulier, nous avons observé qu'une partie de bosons reste piégée, et oscille avec une fréquence qui dépend de la pente du potentiel, au contraire, une autre partie est expulsée hors de la rampe. Nous avons également analysé la dynamique du modèle de Bose-Hubbard en utilisant l'algorithme t-DMRG et l'algorithme de Lanczos. De cette façon, nous avons mis en évidence le rôle de la non-intégrabilité du modèle dans son comportement dynamique. Enfin, nous avons abordé le problème de la thermalisation dans un système quantique étendu. À partir de considérations générales, nous avons introduit la notion de profil de température hors équilibre dans une chaîne des bosons à coeur dure. Nous avons analysé la dynamique du profil de temperature et, notamment, ses propriétés d'échelle / In this thesis we have addressed some open questions on the out-of-equilibrium dynamics of closed one-dimensional quantum systems. In recent years, advances in experimental techniques have revitalized the theoretical research in condensed matter physics and quantum optics. We have treated three different subjects using both numerical and analytical techniques. As far as the numerical techniques are concerned, we have used essentially exact diagonalization methods, the adaptive time-dependent density-matrix renormalization-group algorithm (t-DMRG) and the Lanczos algorithm. At first, we studied the adiabatic quantum dynamics of a quantum system close to a critical point. We have demonstrated that the presence of a confining potential strongly affects the scaling properties of the dynamical observables near the quantum critical point. The mean excitation density and the energy excess, after the crossing of the critical point, follow an algebraic law as a function of the sweeping rate with an exponent that depends on the space-time properties of the potential. After that, we have studied the behavior of ultra-cold bosons in a tilted optical lattice. Starting with the Bose-Hubbard Hamiltonian, in the limit of Hard-Core bosons, we have developed a hydrodynamic theory that exactly reproduces the temporal evolution of some of the observables of the system. In particular, it was observed that part of the boson density remains trapped, and oscillates with a frequency that depends on the slope of the potential, whereas the remaining packet part is expelled out of the ramp. We have also analyzed the dynamics of the Bose-Hubbard model using the tDMRG algorithm and the Lanczos algorithm. In this way we have highlighted the role of the non-integrability of the model on its dynamical behavior. Finally, we have addressed the issue of thermalization in an extended quantum system. Starting from quite general considerations, we have introduced the notion of out-of-equilibrium temperature profile in a chain of Hard-Core bosons. We have analyzed the dynamics of the temperature profile and especially its scaling properties

[For the Abstract, please see the PDF files below, namely "front.pdf"] CONTENTS. Chapter 1 Introduction. Chapter 2 Gross and microscopic visceral anatomy of the male Cape fur seal with reference to organ size and growth. Chapter 3 Age determination and growth in the male Cape fur seal: part one, external body. Chapter 4 Age determination and growth in the male Cape fur seal: part two, skull. Chapter 5 Age determination and growth in the male Cape fur seal: part three, baculum. Chapter 6 Suture age as an indicator of physiological age in the male Cape fur seal. Chapter 7 Sexual dimorphism in the adult Cape fur seal: standard body length and skull morphology. Chapter 8 Reproduction in the male Cape fur seal: age at puberty and annual cycle of the testis. Chapter 9 Diet and foraging behaviour of the Cape fur seal. Chapter 10(a) The Impact of the fur seal industry on the distribution and abundance of Cape fur seals. Chapter 10(b) South African Airforce wildlife rescue: Cape fur seal pups washed from Black Rocks, Algoa Bay, during heavy seas, December 1976. Chapter 11(a) Operational interactions between Cape fur seals and fisheries: part one, trawl fishing. Chapter 11(b) Operational interactions between Cape fur seals and fisheries: part two, squid jigging and line fishing. Chapter 11(c) Operational interactions between Cape fur seals and fisheries: part three, entanglement in man-made debris. Chapter 12 Concentrations of heavy metals (Cd, Cu, Pb, Ni & Zn) and organochlorine contaminants (PCBs, DDT, DDE & DDD) in the blubber of Cape fur seals. Chapter 13 Endoparasites of the Cape fur seal. Chapter 14(a) Preliminary investigations of shark predation on Cape fur seals. Chapter 14(b) Aggressive behaviour of an adult male Cape fur seal towards a great white shark Carcharodon carcharias. Chapter 15 Conclusions and future directions.

Muslims have the starring role in the mass media’s curriculum on otherness, which circulates in-between local and global contexts to powerfully constitute subjectivities. This study inquires into what it is like to be a female, Muslim student in Ontario, in this post 9/11 discursive context. Seven young Muslim women share stories of their high schooling experiences and their sense of identity in interviews and focus group sessions. They also respond to images of Muslim females in the print media, offering perspectives on the intersections of visual media discourses with their lived experience. This interdisciplinary project draws from cultural studies, postcolonial feminist theory, and post-reconceptualist curriculum theorizing. Working with auto/ethno/graphy, my own subjectivity is also brought into the study to trouble researcher-as-knower and acknowledge that personal histories are implicated in larger social, cultural, and historical processes. Using bricolage, I compose a hybrid text with multiple layers of meaning by juxtapositing theory, image, and narrative, leaving spaces for the reader’s own biography to become entangled with what is emerging in the text. Issues raised include veiling obsession, Islamophobia, absences in the school curriculum, and mass media as curriculum. Muslim females navigate a complex discursive terrain and their identity negotiations are varied. These include creating Muslim spaces in their schools, wearing hijab to assert their Muslim identity, and downplaying their religious identity at school. I argue for the need to engage students and teacher candidates in complicated conversations on difference via auto/ethno/graphy, pedagogies of tension, and epistemologies of doubt. Educators and researchers might also consider the possibilities of linking visual media literacy with social justice issues.

Muslims have the starring role in the mass media’s curriculum on otherness, which circulates in-between local and global contexts to powerfully constitute subjectivities. This study inquires into what it is like to be a female, Muslim student in Ontario, in this post 9/11 discursive context. Seven young Muslim women share stories of their high schooling experiences and their sense of identity in interviews and focus group sessions. They also respond to images of Muslim females in the print media, offering perspectives on the intersections of visual media discourses with their lived experience. This interdisciplinary project draws from cultural studies, postcolonial feminist theory, and post-reconceptualist curriculum theorizing. Working with auto/ethno/graphy, my own subjectivity is also brought into the study to trouble researcher-as-knower and acknowledge that personal histories are implicated in larger social, cultural, and historical processes. Using bricolage, I compose a hybrid text with multiple layers of meaning by juxtapositing theory, image, and narrative, leaving spaces for the reader’s own biography to become entangled with what is emerging in the text. Issues raised include veiling obsession, Islamophobia, absences in the school curriculum, and mass media as curriculum. Muslim females navigate a complex discursive terrain and their identity negotiations are varied. These include creating Muslim spaces in their schools, wearing hijab to assert their Muslim identity, and downplaying their religious identity at school. I argue for the need to engage students and teacher candidates in complicated conversations on difference via auto/ethno/graphy, pedagogies of tension, and epistemologies of doubt. Educators and researchers might also consider the possibilities of linking visual media literacy with social justice issues.

The cedar dugout canoe is iconically associated with First Nations peoples of the Pacific Northwest coast, but the vital contribution it made to the economic and social development of British Columbia is historically unrecognized. This beautifully designed and crafted oceangoing vessel, besides being a prized necessity to the maritime First Nations peoples, was an essential transportation link for European colonists. In speed, maneuverability, and carrying capacity it vied with any other seagoing technology of the time. The dugout canoe became an important site of engagement between First Nations peoples and settlers. European produced textual and visual records of the colonial period are examined to analyze the dugout canoe as a site of intercultural interaction with a focus upon the European representation. This research asks: Was the First Nations' dugout canoe essential to colonial development in British Columbia and, if so, were the First Nations acknowledged for this vital contribution? Analysis of primary archival resources (letters and journals), images (photographs, sketches and paintings) and colonial publications, such as the colonial dispatches, memoirs and newspaper accounts, demonstrate that indeed the dugout canoe and First Nations canoeists were essential to the development of the colony of British Columbia. However, these contributions were differentially acknowledged as the colony shifted from a fur trade-oriented operation to a settler-centric development that emphasized the alienation of First Nations’ land for settler use. By focusing research on the dugout canoe and its use and depiction by Europeans, connections between European colonists and First Nations canoeists, navigators and manufacturers are foregrounded. This focus brings together these two key historical players demonstrating their “entangled” nature (Thomas 1991:139) and breaking down “silences” and “trivializations” in history (Trouillot 1995:96), working to build an inclusive and connected history of colonial British Columbia. / Graduate

Muslims have the starring role in the mass media’s curriculum on otherness, which circulates in-between local and global contexts to powerfully constitute subjectivities. This study inquires into what it is like to be a female, Muslim student in Ontario, in this post 9/11 discursive context. Seven young Muslim women share stories of their high schooling experiences and their sense of identity in interviews and focus group sessions. They also respond to images of Muslim females in the print media, offering perspectives on the intersections of visual media discourses with their lived experience. This interdisciplinary project draws from cultural studies, postcolonial feminist theory, and post-reconceptualist curriculum theorizing. Working with auto/ethno/graphy, my own subjectivity is also brought into the study to trouble researcher-as-knower and acknowledge that personal histories are implicated in larger social, cultural, and historical processes. Using bricolage, I compose a hybrid text with multiple layers of meaning by juxtapositing theory, image, and narrative, leaving spaces for the reader’s own biography to become entangled with what is emerging in the text. Issues raised include veiling obsession, Islamophobia, absences in the school curriculum, and mass media as curriculum. Muslim females navigate a complex discursive terrain and their identity negotiations are varied. These include creating Muslim spaces in their schools, wearing hijab to assert their Muslim identity, and downplaying their religious identity at school. I argue for the need to engage students and teacher candidates in complicated conversations on difference via auto/ethno/graphy, pedagogies of tension, and epistemologies of doubt. Educators and researchers might also consider the possibilities of linking visual media literacy with social justice issues.

In this thesis we have studied different aspects of the novel field of quantum information with continuous variables. The higher efficiency and bandwidth of homodyne detection combined with the easiness of generation and manipulation of Gaussian states makes continuous-variable quantum information a promising and flourishing field of research. This dissertation is divided in two parts. The first part explores two applications of the “photon subtraction” operation; Firstly, a technique to generate highly non-Gaussian single-mode states of light; Secondly, an experimental setup capable of realizing a loophole-free Bell test. The second part of this dissertation develops a detailed analysis of an important family of continuous-variable quantum key distribution protocols, namely those based on Gaussian modulation of Gaussian states./Dans cette thèse on a étudié différents aspects de l'information quantique à variables continues. Les meilleures efficacité et bande passante de la détection homodyne combinées à la simplicité de génération et de manipulation d'états gaussiens rend l'information quantique à variables continues un domaine de recherche très prometteur, qui est actuellement en plein essor. La dissertation est divisée en deux parties. La première explore deux applications de l'opération “soustraction de photon”; en premier lieu on présente une nouvelle technique capable de générer des états mono-modaux de la lumière hautement non-gaussiens; deuxiemement on présente un schéma expérimental capable de réaliser un test de Bell sans faille logique. La deuxième partie de cette dissertation développe une étude détaillée d'une famille très importante de protocoles de distribution quantique de clé à variables continues, ceux basés sur la modulation gaussienne d'états gaussiens. / Doctorat en Sciences de l'ingénieur / info:eu-repo/semantics/nonPublished

<p>La distribution quantique de clés est une technique cryptographique permettant l'échange de clés secrètes dont la confidentialité est garantie par les lois de la mécanique quantique. Le comportement particulier des particules élémentaires est exploité. En effet, en mécanique quantique, toute mesure sur l'état d'une particule modifie irrémédiablement cet état. En jouant sur cette propriété, deux parties, souvent appelées Alice et Bob, peuvent encoder une clé secrète dans des porteurs quantiques tels que des photons uniques. Toute tentative d'espionnage demande à l'espion, Eve, une mesure de l'état du photon qui transmet un bit de clé et donc se traduit par une perturbation de l'état. Alice et Bob peuvent alors se rendre compte de la présence d'Eve par un nombre inhabituel d'erreurs de transmission.</p><p><p><p>L'information échangée par la distribution quantique n'est pas directement utilisable mais doit être d'abord traitée. Les erreurs de transmissions, qu'elles soient dues à un espion ou simplement à du bruit dans le canal de communication, doivent être corrigées grâce à une technique appelée réconciliation. Ensuite, la connaissance partielle d'un espion qui n'aurait perturbé qu'une partie des porteurs doit être supprimée de la clé finale grâce à une technique dite d'amplification de confidentialité.</p><p><p><p>Cette thèse s'inscrit dans le contexte de la distribution quantique de clé où les porteurs sont des états continus de la lumière. En particulier, une partie importante de ce travail est consacrée au traitement de l'information continue échangée par un protocole particulier de distribution quantique de clés, où les porteurs sont des états cohérents de la lumière. La nature continue de cette information implique des aménagements particuliers des techniques de réconciliation, qui ont surtout été développées pour traiter l'information binaire. Nous proposons une technique dite de réconciliation en tranches qui permet de traiter efficacement l'information continue. L'ensemble des techniques développées a été utilisé en collaboration avec l'Institut d'Optique à Orsay, France, pour produire la première expérience de distribution quantique de clés au moyen d'états cohérents de la lumière modulés continuement.</p><p><p><p>D'autres aspects importants sont également traités dans cette thèse, tels que la mise en perspective de la distribution quantique de clés dans un contexte cryptographique, la spécification d'un protocole complet, la création de nouvelles techniques d'amplification de confidentialité plus rapides à mettre en œuvre ou l'étude théorique et pratique d'algorithmes alternatifs de réconciliation.</p><p><p><p>Enfin, nous étudions la sécurité du protocole à états cohérents en établissant son équivalence à un protocole de purification d'intrication. Sans entrer dans les détails, cette équivalence, formelle, permet de valider la robustesse du protocole contre tout type d'espionnage, même le plus compliqué possible, permis par les lois de la mécanique quantique. En particulier, nous généralisons l'algorithme de réconciliation en tranches pour le transformer en un protocole de purification et nous établissons ainsi un protocole de distribution quantique sûr contre toute stratégie d'espionnage.</p><p><p><p>Quantum key distribution is a cryptographic technique, which allows to exchange secret keys whose confidentiality is guaranteed by the laws of quantum mechanics. The strange behavior of elementary particles is exploited. In quantum mechnics, any measurement of the state of a particle irreversibly modifies this state. By taking advantage of this property, two parties, often called Alice and bob, can encode a secret key into quatum information carriers such as single photons. Any attempt at eavesdropping requires the spy, Eve, to measure the state of the photon and thus to perturb this state. Alice and Bob can then be aware of Eve's presence by a unusually high number of transmission errors.</p><p><p><p>The information exchanged by quantum key distribution is not directly usable but must first be processed. Transmission errors, whether they are caused by an eavesdropper or simply by noise in the transmission channel, must be corrected with a technique called reconciliation. Then, the partial knowledge of an eavesdropper, who would perturb only a fraction of the carriers, must be wiped out from the final key thanks to a technique called privacy amplification.</p><p><p><p>The context of this thesis is the quantum key distribution with continuous states of light as carriers. An important part of this work deals with the processing of continuous information exchanged by a particular protocol, where the carriers are coherent states of light. The continuous nature of information in this case implies peculiar changes to the reconciliation techniques, which have mostly been developed to process binary information. We propose a technique called sliced error correction, which allows to efficiently process continuous information. The set of the developed techniques was used in collaboration with the Institut d'Optique, Orsay, France, to set up the first experiment of quantum key distribution with continuously-modulated coherent states of light.</p><p><p><p>Other important aspects are also treated in this thesis, such as placing quantum key distribution in the context of a cryptosystem, the specification of a complete protocol, the creation of new techniques for faster privacy amplification or the theoretical and practical study of alternate reconciliation algorithms.</p><p><p><p>Finally, we study the security of the coherent state protocol by analyzing its equivalence with an entanglement purification protocol. Without going into the details, this formal equivalence allows to validate the robustness of the protocol against any kind of eavesdropping, even the most intricate one allowed by the laws of quantum mechanics. In particular, we generalize the sliced error correction algorithm so as to transform it into a purification protocol and we thus establish a quantum key distribution protocol secure against any eavesdropping strategy.</p> / Doctorat en sciences appliquées / info:eu-repo/semantics/nonPublished

Muslims have the starring role in the mass media’s curriculum on otherness, which circulates in-between local and global contexts to powerfully constitute subjectivities. This study inquires into what it is like to be a female, Muslim student in Ontario, in this post 9/11 discursive context. Seven young Muslim women share stories of their high schooling experiences and their sense of identity in interviews and focus group sessions. They also respond to images of Muslim females in the print media, offering perspectives on the intersections of visual media discourses with their lived experience. This interdisciplinary project draws from cultural studies, postcolonial feminist theory, and post-reconceptualist curriculum theorizing. Working with auto/ethno/graphy, my own subjectivity is also brought into the study to trouble researcher-as-knower and acknowledge that personal histories are implicated in larger social, cultural, and historical processes. Using bricolage, I compose a hybrid text with multiple layers of meaning by juxtapositing theory, image, and narrative, leaving spaces for the reader’s own biography to become entangled with what is emerging in the text. Issues raised include veiling obsession, Islamophobia, absences in the school curriculum, and mass media as curriculum. Muslim females navigate a complex discursive terrain and their identity negotiations are varied. These include creating Muslim spaces in their schools, wearing hijab to assert their Muslim identity, and downplaying their religious identity at school. I argue for the need to engage students and teacher candidates in complicated conversations on difference via auto/ethno/graphy, pedagogies of tension, and epistemologies of doubt. Educators and researchers might also consider the possibilities of linking visual media literacy with social justice issues.