Sprawdzian z metod przetwarzania informacji

1. Opisz zasadę pozycyjnego porządkowania liczb. Zademonstruj tę zasadę na przykładzie. (2 pkt.)

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1. Wiadomo, że poniższy kryptogram (powiedzenie premiera brytyjskiego Winstona Churchilla do szefa Secrete Intelligence Service, 1941):

PIIŚIYOLSŁWETSIOŁŻZŁLŻEĄEESAŁELEERCKNNDMŹZKOEMBOOOAIZŻMTDNCCYBTMAEIEIOON

powstał z tekstu jawnego za pomocą metody płotu. Nie wiadomo jednak, z ilu rzędów składał się „płot”. Rozszyfruj tę wiadomość. (3 pkt.)

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1. Podaj definicję pojęć: szyfr, kryptoanaliza, kodowanie, steganografia. (4 pkt.)

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1. Określ na ile sposobów można przestawić litery w słowie „Liceum”. (1 pkt.)

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1. Opisz zasadę działania podpisu elektronicznego. (2 pkt.)

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1. Zaproponuj drzewo alfabetu Morse’a i drzewo Huffmana dla takich znaków: a (8.71), b (1.29), c(3.91), d (3.45), e(7.64), h (1.22). (6 pkt.)

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