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Algoritmo di crittografia dinamica by Ghose, Sourabh

Algoritmo di crittografia dinamica

by Sourabh Ghose
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Book cover type: Paperback
  • ISBN13: 9786203280678
  • Binding: Paperback
  • Subject: N/A
  • Publisher: Edizioni Sapienza
  • Publisher Imprint: Edizioni Sapienza
  • Publication Date:
  • Pages: 84
  • Original Price: GBP 42.0
  • Language: Italian
  • Edition: N/A
  • Item Weight: 137 grams
  • BISAC Subject(s): General

I crittografi devono fornire al mondo un nuovo standard di crittografia. DES, il principale algoritmo di crittografia degli ultimi quindici anni, è vicino alla fine della sua vita utile. Un attacco più recente chiamato XSL, propone un nuovo attacco contro AES e Serpent. I cifrari con piccole S-box e strutture semplici sono particolarmente vulnerabili. Serpent ha piccole S-box e una struttura semplice. AES ha S-box più grandi, ma una descrizione algebrica molto semplice. Molti degli altri algoritmi intatti -Khufu, REDOC II e IDEA- sono protetti da brevetti. RC2 è rotto. Il governo statunitense ha declassificato l'algoritmo Skipjack nei chip Clipper e Capstone. Se il mondo deve avere un algoritmo di crittografia sicuro e liberamente disponibile, dobbiamo sviluppare diversi algoritmi di crittografia candidati ora. Questi algoritmi possono poi essere sottoposti ad anni di esame pubblico e di crittoanalisi. Il libro propone un algoritmo di cifratura a blocchi a chiave privata. La dimensione del blocco è definita dall'utente, e la chiave può essere di lunghezza infinita. L'algoritmo è un algoritmo dinamico, primo nel suo genere, in cui quasi tutti i componenti cambiano a seconda della password stessa utilizzata per generare una chiave o criptare un file.

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