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The paper supports a debate concerning the meaning and the importance of redundancy and ergodicity in cryptography. The discussion is mainly organized around a very thought-provoking enciphering method, running-key cipher. The paper comes with a new view of running-key method which permits to resume and extend it for ergodic sources in order to provide good(More)
Session title: epidemiology, subtypes, regional issues O1 HIV-1 diversity in Bulgaria (current molecular epidemiological picture) Objectives In Bulgaria 1606 cases with HIV/AIDS were diagnosed from 1986 until 2012. Epidemiological data indicated greater heterogeneity of HIV-1 positive population, including minority groups, migrants, and recent increase of(More)
The paper presents a detailed analysis of two types of pseudorandom binary sequence generators obtained by using tent map. The test is performed using a NIST statistical test suite which is widely used for testing the randomness of any random number generator. The binary sequences under investigation are obtained either by considering all the successive(More)
Procedee de cifrare/descifrare folosind sisteme haotice. Analiz˘ a bazat˘ a pe metode statistice¸si teoria controlului sistemelor. Encryption/decryption methods using chaotic systems. Analysis based on statistical methods and control system theory.Acknowledgements First of all, I want to express my gratitude to my Thesis Directors, Professor Adriana Vlad(More)
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