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Algorytm kryptografii dynamicznej by Ghose, Sourabh

Algorytm kryptografii dynamicznej

by Sourabh Ghose
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Book cover type: Paperback
  • ISBN13: 9786203280753
  • Binding: Paperback
  • Subject: N/A
  • Publisher: Wydawnictwo Nasza Wiedza
  • Publisher Imprint: Wydawnictwo Nasza Wiedza
  • Publication Date:
  • Pages: 84
  • Original Price: GBP 42.0
  • Language: Polish
  • Edition: N/A
  • Item Weight: 137 grams
  • BISAC Subject(s): General

Kryptografowie muszą zapewnic światu nowy standard szyfrowania. DES, glówny algorytm szyfrujący przez ostatnie piętnaście lat, zbliża się do końca swojego okresu użyteczności. Nowszy atak, nazwany XSL, proponuje nowy atak na AES i Serpent. Szczególnie podatne na atak są szyfry o malych S-boxach i prostych strukturach. Serpent ma male S-boxy i prostą strukturę. AES ma większe S-boxy, ale bardzo prosty opis algebraiczny. Wiele z innych niezlamanych algorytmów - Khufu, REDOC II, i IDEA - jest chronionych patentami. RC2 jest zlamany. Rząd Stanów Zjednoczonych odtajnil algorytm Skipjack w ukladach Clipper i Capstone. Jeśli świat ma miec bezpieczny i ogólnodostępny algorytm szyfrowania, musimy teraz opracowac kilka kandydujących algorytmów szyfrowania. Algorytmy te mogą byc następnie poddane latami publicznej kontroli i kryptoanalizie. W książce zaproponowano algorytm szyfru blokowego z kluczem prywatnym. Rozmiar bloku jest definiowany przez użytkownika, a klucz może miec nieskończoną dlugośc. Algorytm ten jest pierwszym w swoim rodzaju algorytmem dynamicznym, w którym prawie wszystkie elementy zmieniają się w zależności od samego hasla użytego do wygenerowania klucza lub zaszyfrowania pliku.

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