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While critical pedagogy, as introduced by Paulo Freire (1970), carries an extensive legacy of theoretical interpretation for rhetoric and composition praxis, this study argues that there is a lack of implementable models of practice in the context of first-year writing, particularly for new instructors and graduate teaching assistants. This study uses a three-part methodology. First, relevant scholarship is synthesized in four parts: critical pedagogy as theory, critical pedagogy as design for instructor accompliceship, critical pedagogy as method for students, and relevant critiques. Then, the project summarizes a gloss analysis of institutional climate, including a list of theory-informed, self-reflective instructor pre-work questions. Finally, the central model-building is conducted through a theory-informed coding of the Virginia Tech University Writing Program blueprint Literacy Narrative and Worknets projects. The result of this approach is a proposed implementable model (Miller, 2014) of critical pedagogy in practice for English 1105 at Virginia Tech, including invitational language, scaffolding exercises, and supportive assignments to affirm student agency, engage in instructor accompliceship, and create a climate of love and care in the writing classroom. This model is designed to transform critical pedagogy from unapproachable methodology to workable method that empowers and encourages instructors to try alternative approaches to the classroom. Implications of this work include furthering of diverse, inclusive methods of pedagogy that interrogate power boundaries, honor student/instructor identities, and complicate institutional power structures for WPAs and instructors. / Master of Arts / This project describes an approach to teaching first-year writing at the university level that is based on Paulo Freire's (1970) theory of critical pedagogy, a school of thought that centers the student as the authority in the classroom, rather than the teacher. Essentially, Freire (1970) argues for allowing students to explore their identities, their autonomy, and their existing power imbalances within their education, while the teacher stays out of the way. Possible effects of teaching in this way include a classroom that embodies empathy, care, and engagement for students, as well as a larger awareness of complex power structures. However, one of the largest problems within this scholarly conversation is a lack of suggestions for how to "do" critical pedagogy. While critical pedagogy exists widely in scholarly theory as a methodology, or study of methods, there are very few actual methods—or practical, repeatable, theory-based suggestions—that instructors can implement in their teaching. This study seeks to answer how the institutional climate—the branding, goals, and policies—of Virginia Tech invites an approach of critical pedagogy, as well as what a method of critical pedagogy might look like in the context of two projects within one of Virginia Tech's first-year writing courses. This project first considers relevant background scholarship on critical pedagogy before conducting a two-part analysis: first of the institutional landscape of Virginia Tech, and then of the two projects in their original format. The result is a model of practice that is usable and applicable for instructors teaching writing at Virginia Tech.

Made available in DSpace on 2016-04-04T18:31:27Z (GMT). No. of bitstreams: 1 Manoel Peluso de Carvalho Filho.pdf: 1548469 bytes, checksum: 813f063c4ea17788aa795465c9e6e6f5 (MD5) Previous issue date: 2008-11-24 / Nowadays, the use of the wireless network technology has grown mainly motivated by the price of equipments, ease of installation, network maintenance and expansion of technical safety. The more you use the wireless network resource, the better should be the treatment related to its safety aspect. As the security level increases, the amount of information transmitted between the equipment decreases. This thesis aims to analyze the performance of WLAN network with the implementation of WEP and WPA / TKIP security protocols in an environment that uses applications whose characteristic is to generate small packets on the network. The LanTraffic TM software is used to generate traffic and also to capture the transmission rate in Kbps that flows through the stations. Three scenarios are simulated varying in the distance between the equipments. For each scenario, a comparative study was made and the WLAN behavior without the security resource analyzed, then it was analyzed with the WEP fitted and finally with the WPA/TKIP configured. To develop the experiments it was used a WLAN network in a controlled environment in the Laboratory Research on Radio System in PUC Campinas. Therefore, there is not external interference in the signal transmitted by equipments. / A utiliza??o da tecnologia de rede sem fio tem crescido ultimamente motivado principalmente pelo pre?o dos equipamentos, facilidade de instala??o, manuten??o da rede e amplia??o das t?cnicas de seguran?a. Quanto mais se utiliza o recurso de rede sem fio maior tem de ser o tratamento em rela??o ao aspecto de seguran?a. A medida que aumenta o n?vel de seguran?a, decresce a quantidade de informa??o transmitida entre os equipamentos. Esse trabalho visa analisar o desempenho de rede WLAN(Wireless Local ?rea Network) com a implementa??o dos protocolos de seguran?a WEP(Wired Equivalent Privacy) e WPA/TKIP(WI-FI Protected Access / Temporal Key Integrity Protocol). ? utilizado o software LanTrafficTM para gerar tr?fego na rede e tamb?m para capturar a taxa de transmiss?o em Kbps trafegados entre as STAs. S?o emulados tr?s cen?rios variando a dist?ncia entre os equipamentos. Para cada cen?rio foi confeccionado um comparativo e analisado o comportamento da WLAN configurado sem seguran?a, com o WEP habilitado e finalmente com o WPA/TKIP configurado. Para executar os experimentos utilizou-se uma rede WLAN no laborat?rio de pesquisa em sistema de r?dio (LP-SiRa) da PUC Campinas em um ambiente controlado. Com isso n?o h? interfer?ncias na transmiss?o dos sinais emitidos pelos equipamentos Ou seja, sem interfer?ncia externa no sinal transmitido entre os equipamentos.

Trådlosa nätverk är av naturen sårbara for avlyssning för att kommunikationen sker med radiovagor. Därfor skyddas trådlosa nätverk med kryptering. WEP var den första krypteringsstandarden som användes av en bredare publik som senare visade sig innehålla flera sårbarheter. Följden blev att krypteringen kunde förbigås på ett par minuter. Därför utvecklades WPA som ett svar till sårbarheterna i WEP. Kort därefter kom WPA2 som är den standard som används i nutid. Den svaghet som kan påvisas med WPA2 finns hos WPA2-PSK när svaga lösenord används. Mjukvaror kan med enkelhet gå igenom stora uppslagsverk för att testa om lösenord går att återställa. Det är en process som tar tid och som därför skyddar nätverken i viss mån. Dock har grafikprocessorer börjat användas i syfte för att återställa lösenord. Grafikkorten är effektivare och återställer svaga lösenord betydligt snabbare än moderkortens processorer. Det öppnar upp for att jämföra lösenord med ännu större uppslagsverk och fler kombinationer. Det är vad denna studie avser att belysa; hur har grafikkortens effektivitet påverkat säkerheten i trådlösa nätverk ur ett verksamhetsperspektiv. / Wireless networks are inherently vulnerable for eavesdropping since they use radio waves to communicate. Wireless networks are therefore protected by encryption. WEP was the first encryption standard that was widely used. Unfortunately WEP proved to have several serious vulnerabilities. WEP could be circumvented within few minutes. Therefore WPA was developed as a response to the weak WEP. Shortly thereafter WPA2 was released and are now being used in present. The only weakness with WPA2 is in the subset WPA2-PSK when weak passwords are being used. Software could easily go through large dictionaries to verify if a password could be recovered. But that is time consuming and therefore providing wireless networks limited protection. However a new area of use with advanced graphic cards has showed that it is providing a faster way of recovering passwords than the ordinary processor on the motherboard. That opens up for the larger use of dictionaries and the processing of words or combinations of words. That is what this study aims to shed light on. How the efficiency of the graphic cards have affected security in wireless networks from a corporate perspective of view.

Approved for public release, distribution is unlimited / Since its introduction in 1999, the Institute of Electrical and Electronics Engineers (IEEE) 802.11 Wireless Local Area Network (WLAN) has become the de-facto standard for wireless networking, providing convenient and low cost connectivity. Increasingly, enterprises are extending their networks with 802.11-based WLANs to provide mobility and information-on-the-move for its employees. However, the introduction of WLANs into enterprise networks has raised major concerns about security. A poorly implemented WLAN introduces weaknesses in the enterprise network which can be exploited by attackers, resulting in severe consequences for the enterprise. This thesis was sponsored by the DoD to study the problem of designing a secure wireless architecture for an enterprise network. The specific requirements for the enterprise network were based extensively on DoD and the intelligence community's security guidelines and policies. This thesis provides an indepth analysis into the 802.11 standard and measures how far the standard goes in meeting the specific requirements of the enterprise network. This thesis presents a layered-defense architecture to provide a scalable design for secure wireless networks. A prototype system utilizing XML to control the flow of classified information in wireless networks is also presented. . / Civilian, Defense Science and Technology Agency, Singapore

This thesis investigates how Ericsson AB should do to achieve fast and secure handover when roaming in a WLAN. It also provides a security analysis of the system that the wireless access point is part of. The reason for this is that Ericsson is selling an access point called the ABS 2200 aimed at the public hotspot market. The premise was that they wanted a standardized way of handling the roaming issue. At the outset the 802.11F standard looked like a good alternative (in fact the only standardized alternative). Towards last stages of the work though, it was discovered that the 802.11F standard is no longer supported by IEEE. Despite this fact, the conclusion is that secure and fast roaming can be attained if 802.11F is combined with the security standard 802.11i. The security analysis concludes that Denial Of Service is a major threat to WLAN hotspots. It also points out the link between the access point and authentication server is the weakest link in the system. The recommendation is that this link receives an additional layer of protection through IPsec withESP. The algorithm recommendations for ESP are AES for confidentiality and SHA-1 for integrity. This thesis can also be used as a primer on security in WLAN and contains an extensive glossary making it useful as a reference when reading 802.11 standards.

This diploma thesis is focused on implementation of application for security monitoring of network communication of other applications in mobile device with Android platform. Provides users information about security risks that may harm his/her privacy or device. It uses a local VPN to tunnel all data sent to the wireless network. These can be linked to an application that has sent them because the Android kernel is derived from the Linux kernel and can be used to retrieve information about established network connections and the application identifier associated with the connection. This mapping allows to get more information about an app that is potentially dangerous for your mobile device.

The goal of this thesis is an exploration of the possibilities of Espressif's ESP32 chips in combination with Espressif IoT Development Framework with intention of implementing well-known Wi-Fi attacks on this platform. In this work, multiple implementation proposals were done for deauthentication attack in two variants followed by WPA/WPA2 handshake capture, attack on PMKID, creation of rogue MitM access point, or brute-force attack on WPS PIN, and more. A universal penetration tool ESP32 Wi-Fi Penetration Tool was proposed and implemented, including deauthentication attacks with WPA/WPA2 handshake capture. This tool provides an easy way to configure and run malicious Wi-Fi attacks without any domain knowledge required from the user. The outcome of this work opens new attack vectors for the attacker, thanks to cheap, ultra-low powered, and lightweight ESP32 chips.

The master's thesis deals with the issue of Wireless Local Area Network (WLAN) from the viewpoint of the security and functional principle of security mechanisms. The transition to the issue concerning the security is accompanied by the methods of wireless data transmission operating on the level of physical layer (FHSS, DSSS, OFDM, MIMO), which is followed by the summary of individual 802.11 standards. The next part deals with the issue of shared transmission medium (CSMA/CA), influence of interference and correcting mechanisms (RTS/CTS). Within the security, the principles of the authentication along with the commonly used methods of security (WEP, WPA, WPA2) are described in detail. The first part concerning security deals with the security in the form of the WEP protocol, which is considered insufficient nowadays and points out the imperfect implementation and the consequent risks. The following part describes the security in the form of WPA which eliminates the implementation weaknesses of the previous WEP security protocol. The description of commonly used mechanisms of authentication (PSK, 802.1x), required temporary key management (PTK, GTK), data integrity (MIC) and encryption which uses TKIP protocol are also included. The last part, possible WLAN security, is aimed at the full support of 802.11i standard, which is called WPA2 (sometimes RSN). That part describes the basic encryption security element CCMP, which is based on the AES block cipher modes. The practical part of the thesis deals with the security verification of current wireless networks. In the process of verification the accessible HW means and programming tools of Open Source Software (OSS) are used. By means of verification it has been pointed out that there are possible security risks resulting from the security method which has been used. Also several recommendations how to reduce the security risks of the used method to minimum are mentioned.

This master's thesis deals with wireless networks, mainly about the WiFi. It deals with summary of individual security mechanism both theoretically and using them in real hardware. Mainly it is interested in the security of the individual mechanisms and their weaknesses, which cause rupture of security. At each chapter the ideas and methods, that the attackers are trying for infiltration of wireless networks and decrypt encryption WEP, WPA or WPA2, are outlined. The principle of the authentication of the WiFi by the authentication server and its options, which is connected with directory service LDAP, is also explained in this thesis. The penultimate chapter deals with the summary of security mechanisms and references that should be adhered by design of the WiFi for the provision of the high security. The ending of the master's thesis is devoted to social engineering and its most famous representatives.