Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"Information hiding"”.
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A robust algorithm for information hiding in digital pictures
A problem inherent in information hiding techniques for digital images is that of alignment during data extraction. This alignment problem can be solved using a search approach where a combination of coarse orientation detection, random search and gradient descent methods are employed. When used in …
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Information Hiding Codes and Their Applications to Images and Audio
… Here, the attacker is assumed to have enough information about the algorithmic steps of information hiding schemes (except for the secret key). Within this scenario he has access to the decoder; his goal is to break the scheme with a finite number of trials by reliably finding or estimating …
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Linux, OpenBSD, and Talisker : a comparative complexity analysis
… secure software design principles, such as information hiding, hierarchical structuring, and modularity, as well as software complexity metrics, such as the McCabe Cyclomatic Complexity and the number-of-lines-of-code. In this analysis, we use a reverse engineering tool to show how the three …
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Evaluating modern defenses against control flow hijacking
… enforcement on 0x86-32 architecture and by information-hiding on 0x86-64 and ARM architectures. We show that when CPI relies on information hiding, it's safe region can be leaked and thus rendering it ineffective against malicious exploits. CFI works by assigning tags to indirect branch …
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Steganografický souborový systém
In the present work we study protecting of information in situations, when cryptography alone is not enough. We will try to analyze possibilities of information hiding, not in innocent looking carrier of information (sound, picture, video), but in pseudosteganographic archive. We will try to …
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Flash Memory For Ubiquitous Hardware Security Functions
… number generation, digital fingerprinting and information hiding. Use of random telegraph noise (a type of quantum noise source in highly scaled Flash memory cells) enables high quality true random number generation at a rate up to 10Kbits / second. A scheme based on partial programming …
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Tartan Threads : a method for the real-time digital recognition of secure documents in ink-jet printers
… presents a challenge for the application of information hiding techniques. The marking should be strong enough to provide certainty that a document was intentionally marked and robust enough to withstand the transformations inherent in the scanning and printing process. Using an extended …
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Dependency models as a basis for analyzing software product platform modularity : a case study in strategic software design rationalization
… software product platforms. The use of modular, information-hiding architectures is considered beneficial in this regard, because they enable the addition of new features and the correction of software defects without widespread changes (Parnas, 1972; Parnas, 1978). Moreover, modular …
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Object-oriented software development in structural engineering
… management of complexity, data modelling, information hiding, software reusability, and software evolution. The purpose of this thesis is to give an overview of the object-oriented paradigm. This discussion includes a review of the necessary requirements of an object-oriented language. This …
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Steganography-based secret and reliable communications: Improving steganographic capacity and imperceptibility
… steganography hides the very existence of secret information rather than hiding its meaning only. Image based steganography is the most common system used since digital images are widely used over the Internet and Web. However, the capacity is mostly limited and restricted by the size of cover …
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The effective use of implicit parallelism through the use of an object-oriented programming language
… is used to extract sufficient semantic information for the parallelisation (i.e. code-generation) phase. Programming Principles. The set of principles presented are based upon information hiding, sharing and containment of objects and the dividing up of methods on the basis of a …
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A Framework for the Simulation of Complex Real-Time Systems
… system being modelled, which facilitates both information hiding and hierarchical scheduling. The framework thus allows an integrated approach to the analysis of complex real-time systems. No simulation is useful, however, without the ability to easily extract useful high-level information from …
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Specification of multi-object coordination schemes using coordinating environments
… on them. The conflict between the issues of information hiding (for better encapsulation) and information externalization (to enable coordination) is partially resolved by requiring components to provide state-interrogation methods. This allows a CE object to obtain and use local state …
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Framework for adaptive multi-scale simulation of textile reinforced concrete
… time stepping algorithm breaks the principles of information hiding and encapsulation. Instead, an adaptive time-stepping framework is presented that allows for the structured extension of object-oriented finite element code with additional adaptive features. The design takes into account not only …
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A robust region-adaptive digital image watermarking system
… images. The technique involves a subset of information-hiding technologies, which work by embedding information into a host image without perceptually altering the appearance of the host image. Despite progress in digital image watermarking technology, the main objectives of the majority of …
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A knowledge base approach to the specification of non-functional real-time system requirements
… and abstraction to provide enhanced information hiding and thus a smoother transition from specification to implementation. The existence of system requirements analysis as a specific initial phase of system development requiring tailor-made methods and tools became apparent. …
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Information security based on temporal order and ergodic matrix
This thesis proposes some information security systems to aid network temporal security applications with multivariate quadratic polynomial equations, image cryptography and image hiding. In the first chapter, some general terms of temporal logic, multivariate quadratic equations (MQ) problems and …
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Transparent cultures: Imagined users and the politics of software design (1975-2012)
… three chapters examine how and why strategies of information hiding shaped consumer software design from the 1980s on. In Chapter 1, I analyze technical literature from the 1970s and 80s to show how cognitive psychologists and computer engineers developed an ideal of transparency that discouraged …