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Yayın GSM and GPRS security(Işık Üniversitesi, 2004-09) Güven, Yusuf; Yarman, Bekir Sıddık Binboğa; Işık Üniversitesi, Fen Bilimleri Enstitüsü, Elektronik Mühendisliği Yüksek Lisans ProgramıIn this thesis study, today's popular mobile voice (GSM) and data (GPRS) communication technologies (as an intorduction) and their security were studied. GSM arhitecture, key components of the GSM, security fonctions, and confidentialy of the GSM was discussed. The main parts that composed the GSM infrastreucture and their relationships in the system was examined. Some identities related to GSM security were introduced. GSM security functions provide to keep secret the identity of the subscriber, authenticate and outhorize the subscriber. Three security algorithms are used to provide authentication, confidentially, and key generation that are A3, A5, and A8 respecttively. To prevent the eavesdropping on the user data it is necessary to encrypt signaling and traffic channel. Because GPRS system uses GSM's infrastructure, it is meaningful to examine the both system together. GPRS infrastructure, the elements that composed the GPRS, security risks and their solututions were examined. GPRS introduced new elements to GSM system, which are GGSN and SGSN. These elements provide main security issues, handles the security functions, keep track of the location of the mobile and authenticates it. Neverthless interconnections with the other networks and systems cause other security risks. To adress these issues encryption, authentication and hashing algorithms are used.Yayın Dilemma between security and privacy on the internet(Işık Üniversitesi, 2005-07-31) Ayduran, Güven; Akçakaya, Ergül; Yarman, Bekir Sıddık Binboğa; Işık Üniversitesi, Fen Bilimleri Enstitüsü, Enformasyon Teknolojileri Yüksek Lisans ProgramıIn this thesis, the following issues are discussed. Even in today society, it is hard to talk about security and privacy. And no one can imagine what will be structure of tomorrow society. We study what are the internet security systems and government security projects. Even we discuss that these systems effect to human rights and privacy. We define importance of cryptography and discuss relation with human rights. We examine internet privacy laws. We also study about George Orwell's book '1984' and consider similarity between novel and real life. We give information about intellectual property and its rights on the internet. We show that intellectual property rights are not enough to protect all properties and these rules are valid for some economic environments. We also discuss issue in instead of knowledge society, creates ignorance society. All these discussed and studied issues show big dilemma to us between security and privacy. The dilemma goes to a result that there is no security in today's society. Keywords: Security, privacy, internet security, internet privacy rights, cryptography, Orwell, intellectual property rights, knowledge society, ignorance society, internet and dilemma.
