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Algoritmo di crittografia dinamica
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ISBN10: 6203280674
ISBN13: 9786203280678
Publisher: Edizioni Sapienza
Published: Jul 2 2024
Pages: 84
Weight: 0.30
Height: 0.20 Width: 6.00 Depth: 9.00
Language: Italian
ISBN13: 9786203280678
Publisher: Edizioni Sapienza
Published: Jul 2 2024
Pages: 84
Weight: 0.30
Height: 0.20 Width: 6.00 Depth: 9.00
Language: Italian
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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