Download e-book for iPad: A Classical Introduction to Cryptography: Applications for by Serge Vaudenay

By Serge Vaudenay

ISBN-10: 0387258809

ISBN-13: 9780387258805

A Classical advent to Cryptography: functions for Communications safety introduces basics of data and communique defense by means of delivering acceptable mathematical suggestions to turn out or holiday the protection of cryptographic schemes.

This advanced-level textbook covers traditional cryptographic primitives and cryptanalysis of those primitives; simple algebra and quantity conception for cryptologists; public key cryptography and cryptanalysis of those schemes; and different cryptographic protocols, e.g. mystery sharing, zero-knowledge proofs and indisputable signature schemes.
A Classical advent to Cryptography: purposes for Communications safety is wealthy with algorithms, together with exhaustive seek with time/memory tradeoffs; proofs, corresponding to defense proofs for DSA-like signature schemes; and classical assaults equivalent to collision assaults on MD4. Hard-to-find criteria, e.g. SSH2 and defense in Bluetooth, also are included.

A Classical creation to Cryptography: functions for Communications protection is designed for upper-level undergraduate and graduate-level scholars in machine technological know-how. This e-book is additionally compatible for researchers and practitioners in undefined. A separate exercise/solution book is accessible besides, please visit www.springeronline.com below writer: Vaudenay for added information on the right way to buy this e-book.

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Extra resources for A Classical Introduction to Cryptography: Applications for Communications Security

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Given a fixed key length, prove that the set of all Vigen`ere encryption function defined by all possible keys of given length is a group. 2. What is the product cipher of two Vigen`ere ciphers with different key lengths? 2 Conventional Cryptography Content DES: Feistel Scheme, S-boxes Modes of operation: ECB, CBC, OFB, CFB, CTR, UNIX passwords Classical designs: IDEA, SAFER K-64, AES ⋆Case study: FOX, CS-CIPHER Stream ciphers: RC4, A5/1, E0 Brute force attacks: exhaustive search, tradeoffs, meet-in-the-middle In Chapter 1 we saw the foundations of cryptography.

X = x1 ||x2 || · · · ||xn y0 = IV yi = C(yi−1 ⊕ xi ) y = y1 ||y2 || · · · ||yn CBC decryption is easily performed by the following rules. 6. CBC mode. The initial vector does not have to be secret. There are actually four different ways to use the IV. 1. 2. 3. 4. Generate a pseudorandom IV which is given in clear with the ciphertext. Generate a pseudorandom IV which is transmitted in a confidential way. Use a fixed IV which is a known constant. Use a fixed IV which is another part of the secret key.

Yi = xi ⊕ ri y = y1 ||y2 || · · · ||yn Here truncLℓ truncates the ℓ leftmost bits, and truncR64 truncates the 64 rightmost bits. When ℓ is set to the full block length (here 64 bits), the description of the OFB mode is quite simple as illustrated in Fig. 8. Note that it is not recommended to use ℓ smaller than the block length due to potential short cycles (see Ref. [57]). Actually, the OFB mode can be seen as a pseudorandom generator mode which is followed by the one-time pad. Here IV must be used only once (otherwise the cipher is equivalent to a one-time pad with a key used several times).

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A Classical Introduction to Cryptography: Applications for Communications Security by Serge Vaudenay


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