Sürdürülebilir Yeşil Kampüs Koleksiyonu / Sustainable Green Campus Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7755

Browse

Filters

2001 - 20053

Settings

Access Right: Open AccessAuthor: search.filters.author.Koltuksuz, Ahmet Hasan

Search Results

Now showing 1 - 3 of 3
  • Master Thesis
    A Firewall Design for Academic Environments
    (Izmir Institute of Technology, 2001) Tok, Metin; Koltuksuz, Ahmet Hasan
    Computer networks in academic environments could have many secUlity problems if there weren't enough precaution. The source of these problems is generally vulnerabilities of TCP/IP protocol and Internet. Vulnerabilities can cause threats. These threats will be analyzed in this thesis. There are many kind of countelmeasures to prevent the assets of the academic networks. Firewalls are a kind of countermeasure against these attacks. In this thesis, these countelmeasures will be also analyzed and a firewall will be designed and proposed for academic environments against these threats.
  • Master Thesis
    An Analysis of Key Generation Efficiency of Rsa Cryptosystem in Distributed Environments
    (Izmir Institute of Technology, 2005) Çağrıcı, Gökhan; Koltuksuz, Ahmet; Koltuksuz, Ahmet Hasan
    As the size of the communication through networks and especially through Internet grew, there became a huge need for securing these connections. The symmetric and asymmetric cryptosystems formed a good complementary approach for providing this security. While the asymmetric cryptosystems were a perfect solution for the distribution of the keys used by the communicating parties, they were very slow for the actual encryption and decryption of the data flowing between them. Therefore, the symmetric cryptosystems perfectly filled this space and were used for the encryption and decryption process once the session keys had been exchanged securely. Parallelism is a hot research topic area in many different fields and being used to deal with problems whose solutions take a considerable amount of time. Cryptography is no exception and, computer scientists have discovered that parallelism could certainly be used for making the algorithms for asymmetric cryptosystems go faster and the experimental results have shown a good promise so far. This thesis is based on the parallelization of a famous public-key algorithm, namely RSA.
  • Master Thesis
    A Distributed Multiprecision Cryptographic Library Design
    (Izmir Institute of Technology, 2005) Hışıl, Hüseyin; Koltuksuz, Ahmet Hasan
    Cryptographic schemes require specialized software libraries to work with large numbers on fixed-precision processors. The concept is known as multiple-precision computation. In this thesis, we aim to review the multiple-precision algorithms with the contemporary modifications. With this motivation, we develop a new multiprecision library named CRYMPIX and we carefully benchmark CRYMPIX in comparison with the fastest alternatives. We also develop a distributed wrapper for computationally expensive functions. Hence, we provide an abstraction method for the higher level cryptographic implementations by allowing them run in a distributed environment without containing any specialized code for distribution.