Separating Information Protection from Resource Management.

Securing information in a computer system is becoming an intractable problem. Exacerbating the situation is the current paradigm of trusting an operating system for both security and resource management. One solution to this problem is to separate the role of protecting information from managing resources. This thesis studies the design and implementation of a system architecture called Software-Privacy Preserving Platform (SP3). SP3 creates a new layer that is more privileged than the operating system and responsible for providing information secrecy to user applications. SP3 provides page-granular memory secrecy protection by augmenting memory paging and interrupt mechanisms of a computer system in such a way that physical memory pages for user applications are rendered encrypted to the operating system. The resulting SP3 system therefore provides secrecy protection for the information contained in the memory of user applications. SP3 is implemented by modifying a hypervisor, which efficiently emulates the augmented semantics of paging and interrupt mechanism introduced by SP3. The modified hypervisor employs a couple of optimization techniques to reduce the number of costly page-wide block cipher operations. In the page-frame replication technique, the hypervisor internally keeps both encrypted and decrypted images of a page and relies on shadow page table redirection to map the correct page. In the lazy synchronization technique, the needed synchronization between the replicated images of the page is deferred as long as possible so that the synchronization happens not when an image is modified, but when the other image is actually accessed. This thesis further explores the challenges and solutions in the new programming environment introduced by SP3. This thesis also presents an SP3-based digital rights-management solution that can protect both the copy-protected multimedia contents and a trusted multimedia player program without limiting the end-users' freedom. In conclusion, this thesis demonstrates the feasibility of separating information protection from resource management in systems software. This separation greatly reduces the size and complexity of the trusted part for information protection, resulting in a more resilient system that can tolerate a compromise in the operating system.Ph.D.Computer Science & EngineeringUniversity of Michigan, Horace H. Rackham School of Graduate Studieshttp://deepblue.lib.umich.edu/bitstream/2027.42/75886/1/jisooy_1.pd

Design Development Test and Evaluation (DDT and E) Considerations for Safe and Reliable Human Rated Spacecraft Systems

A team directed by the NASA Engineering and Safety Center (NESC) collected methodologies for how best to develop safe and reliable human rated systems and how to identify the drivers that provide the basis for assessing safety and reliability. The team also identified techniques, methodologies, and best practices to assure that NASA can develop safe and reliable human rated systems. The results are drawn from a wide variety of resources, from experts involved with the space program since its inception to the best-practices espoused in contemporary engineering doctrine. This report focuses on safety and reliability considerations and does not duplicate or update any existing references. Neither does it intend to replace existing standards and policy

Future of the Internet--and how to stop it

vi, 342 p. : ill. ; 25 cmLibro ElectrónicoOn January 9, 2007, Steve Jobs introduced the iPhone to an eager audience crammed into San Francisco’s Moscone Center.1 A beautiful and brilliantly engineered device, the iPhone blended three products into one: an iPod, with the highest-quality screen Apple had ever produced; a phone, with cleverly integrated functionality, such as voicemail that came wrapped as separately accessible messages; and a device to access the Internet, with a smart and elegant browser, and with built-in map, weather, stock, and e-mail capabilities. It was a technical and design triumph for Jobs, bringing the company into a market with an extraordinary potential for growth, and pushing the industry to a new level of competition in ways to connect us to each other and to the Web.Includes bibliographical references (p. 249-328) and index Acceso restringido a miembros del Consorcio de Bibliotecas Universitarias de Andalucía Electronic reproduction. Palo Alto, Calif. : ebrary, 2009 Modo de acceso : World Wide Webpt. 1. The rise and stall of the generative Net -- Battle of the boxes -- Battle of the networks -- Cybersecurity and the generative dilemma -- pt. 2. After the stall -- The generative pattern -- Tethered appliances, software as service, and perfect enforcement -- The lessons of Wikipedia -- pt. 3. Solutions -- Stopping the future of the Internet : stability on a generative Net -- Strategies for a generative future -- Meeting the risks of generativity : Privacy 2.0. Index32

The Future of the Internet and How to Stop It

This extraordinary book explains the engine that has catapulted the Internet from backwater to ubiquity—and reveals that it is sputtering precisely because of its runaway success. With the unwitting help of its users, the generative Internet is on a path to a lockdown, ending its cycle of innovation—and facilitating unsettling new kinds of control. IPods, iPhones, Xboxes, and TiVos represent the first wave of Internet-centered products that can’t be easily modified by anyone except their vendors or selected partners. These “tethered appliances” have already been used in remarkable but little-known ways: car GPS systems have been reconfigured at the demand of law enforcement to eavesdrop on the occupants at all times, and digital video recorders have been ordered to self-destruct thanks to a lawsuit against the manufacturer thousands of miles away. New Web 2.0 platforms like Google mash-ups and Facebook are rightly touted—but their applications can be similarly monitored and eliminated from a central source. As tethered appliances and applications eclipse the PC, the very nature of the Internet—its “generativity,” or innovative character—is at risk. The Internet’s current trajectory is one of lost opportunity. Its salvation, Zittrain argues, lies in the hands of its millions of users. Drawing on generative technologies like Wikipedia that have so far survived their own successes, this book shows how to develop new technologies and social structures that allow users to work creatively and collaboratively, participate in solutions, and become true “netizens.” The author has made an online version of this work available under a Creative Commons Attribution-Noncommercial-Share Alike 3.0 License. It can be accessed through the author’s Web site at http://www.jz.org

Conceptual metaphor in English popular technology and Greek translation

This research project studies the metaphorical conceptualisation of technology in English popular technology magazines and in translation in the respective Greek editions. The focus is on the cognitive linguistic view of metaphor initially presented by Lakoff and Johnson (1980), on the metaphor identification procedure (Pragglejaz Group 2007), and critical metaphor analysis (Charteris-Black 2004). The analysis of the English data identifies 14 main metaphors and 29 submetaphors which contribute to the structure of the target domain of technology. It distinguishes between conventional and novel metaphors, and common and original metaphorical expressions, motivated by correlations in experience between diverse source domains and by the widespread diffusion and impact of technology. The English data also provide insight into the functions of these metaphors in popular technology discourse and reveal evidence to thinking, values and attitudes about technology in the English language. The analysis of the Greek data examines similarities and differences in the conceptualisations between the English and Greek languages and cultures, and finds similarities in the categories of metaphors, frequency of and preference for metaphor use in the source and target languages, and in the majority of metaphorical expressions. Similarities are based on common experiences stemming from experiential co-occurrence or experiential similarity, and on translated experience. Differences are restricted to specific-level metaphors and expressions, motivated by alternative conceptualisations of terminology, cultural specificity and preferential conceptualisations. A set of translation strategies and a number of possible translation effects are also identified. These strategies and effects add to the possibilities of translation variations and the range of translation options, and are used to draw conclusions regarding the similarities and differences between the English and Greek languages and cultures. Consequently, through the identification and description of metaphors in technology magazines and in translation, the study attempts to highlight aspects of the culture of technology, which views technology as a cultural artefact and a producer of its own culture.EThOS - Electronic Theses Online ServiceGreek State Scholarship Foundation (IKY)GBUnited Kingdo