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Bilgisayar Mühendisliği Bölümü Tezleri

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12416/58

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Browsing Bilgisayar Mühendisliği Bölümü Tezleri by Department "Çankaya Üniversitesi, Mühendislik Fakültesi, Bilgisayar Mühendisliği Bölümü"

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    Master Thesis
    Performence enhancement analysis of modern wireless networks using mimo technique
    (2014) Abdulla, Ayad
    The systems that utilizing multiple transmit and multiple receive antennas are commonly known as Multiple - Input Multiple - Output (MIMO) systems. This wireless networking technology can greatly improves wireless communication system by exploiting the multipath propagation constructively. These paths can be exploited to provide redundancy of transmitted data, thus improving the reliability of transmission (diversity gain) or increasing the number of simultaneou sly transmitted data streams and increasing the capacity of the wireless system (multiplexing gain) and decreasing bit error rate. This thesis introduces a comparative studies that determines the diversity and channel capacity enhancements, resulting from using our proposed MIMO wireless model. The antenna configurations for this model uses new microstrip bandpass filter to prevent the lower image sideband as far as possible for these antennas.These enhancements has been analysed in term of Bit Error Rate (BER) and bit rate of data transmission for the diversity and capacity enhancements, respectively.
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    Master Thesis
    Security analysis of HTML5 elements, attributes, and features
    (2016) Ahmed, Saadallah Darwesh
    The aim of this research is analyzing the security of new HTML5 elements, attributes and features. Another aim of this research is finding how every HTML5 code can be attacked for creating new attacking patterns and exploiting possible vulnerabilities. These findings help web developers to understand how new HTML5 features are affected the current state of web security and how current available prevention techniques can set down possible threats. In this study, firstly, the current HTML5 standard was reviewed and security issues according to principles of web security were detected. After analyzing these findings, the results show that there are security issues in some HTML5 features that can be used by attackers for creating new high-risk and low-risk attacks. The results also show that some new HTML5 features provide more capabilities for some known attacking techniques. According to our analyses, widely available cross-site scripting attacks can be prevented at client-side by switching prevention technique from server-side to the browser prevention techniques. These findings increase our understanding of how adding capabilities to client-side programming affects the security of web applications.