Browsing by Author "Wanambisi, Aldrin W."

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    Advances in composite integer factorization
    (2013) Wanambisi, Aldrin W.; Aywa, Shem.; Maende, Cleophas.; Muketha, Geoffrey Muchiri.
    In this research we propose a new method of integer factorization. Prime numbers are the building blocks of arithmetic. At the moment there are no efficient methods (algorithms) known that will determine whether a given integer is prime or and its prime factors [1]. This fact is the basis behind many of the cryptosystems currently in use.
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    A probabilistic data encryption scheme (PDES)
    (2013) Wanambisi, Aldrin W.; Maende, Cleophas.; Muketha, Geoffrey.; Aywa, Shem.
    A chaos-based cryptosystem has exhibited some unconventionally excellent properties. At the same time, it is of vital significance for its advancement to give a mathematically rigorous cryptanalysis. In this study, we analyze the security of an image encryption algorithm, whose main idea is to use the sum of image data for encryption. By applying known plaintext and chosen plaintext attacks, we show that all the secret keys can be revealed.