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Security in Fixed and Wireless Networks: An Introduction to by Gunter Schafer(auth.)

By Gunter Schafer(auth.)

With our smooth society' s elevated dependence on details know-how and communique networks, the topic of community protection is constructing right into a an important base know-how and most of the people operating within the networking and knowledge know-how enterprise might want to recognize the fundamentals of mounted and instant community defense. This ebook provides an organization advent into the sector masking the basics of knowledge protection know-how and explaining in-depth how they're utilized in verbal exchange networks.

techniques community defense from the instant in addition to the pc networking part.

  • Concentrates at the middle networking matters (first four layers as much as the shipping layer).
  • Helps the reader to appreciate the dangers of an absence of safeguard in a community & easy methods to hinder it.
  • Brings safety in networks modern by way of masking instant and cellular safety matters.
  • Includes safeguard concerns round scorching subject matters corresponding to instant LANs (e.g. 802.11), AAA (Authentication, authorization, and accounting), and cellular IP.
  • Illustrates complex protection ideas with workouts and lines an intensive glossary.

a vital reference instrument for graduate scholars of computing device technology, electric engineering and telecommunications who have to research the fundamentals of community protection. additionally, execs operating in information- & telecommunications also will enjoy the booklet because it supplies a self-contained advent to the fundamentals of community protection: community managers, engineers, IT managers.Content:
Chapter 1 advent (pages 1–15):
Chapter 2 basics of Cryptology (pages 17–29):
Chapter three Symmetric Cryptography (pages 31–52):
Chapter four uneven Cryptography (pages 53–81):
Chapter five Cryptographic cost Values (pages 83–100):
Chapter 6 Random quantity iteration (pages 101–110):
Chapter 7 Cryptographic Protocols (pages 111–145):
Chapter eight entry regulate (pages 147–155):
Chapter nine Integration of defense prone into verbal exchange Architectures (pages 157–170):
Chapter 10 hyperlink Layer protection Protocols (pages 171–194):
Chapter eleven IPSec safeguard structure (pages 195–242):
Chapter 12 shipping Layer safeguard Protocols (pages 243–268):
Chapter thirteen net Firewalls (pages 269–288):
Chapter 14 safety points of cellular conversation (pages 289–298):
Chapter 15 safety in instant neighborhood sector Networks (pages 299–313):
Chapter sixteen protection in cellular Wide?Area Networks (pages 315–331):
Chapter 17 defense of cellular web verbal exchange (pages 333–355):

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Extra info for Security in Fixed and Wireless Networks: An Introduction to Securing Data Communications

Sample text

Claims that RC4 is immune to differential and linear cryptanalysis and that the pseudorandom bit generator has no small cycles. So far no cryptographer has been able to refute this claim. The key weakness discovered so far in the RC4 algorithm is that, depending on the method used to combine the key and the initialisation vector, the key can be discovered using known plaintext–ciphertext pairs. It is sufficient for the attacker to know the first two octets of the encrypted plaintexts. Depending on the method used to generate the initialisation vectors, the attacker needs around one million or four million such pairs (Pi , Ci ), encrypted with the same key K and different initialisation vectors IVi .

In contrast to symmetric cryptgraphy where keys are basically agreed between two (or more) entities A and B and consequently referred to as KA,B , asymmetric cryptography allows the allocation of exactly one key pair (−KA , +KA ) to each entity A. Security in Fixed and Wireless Networks: An Introduction to Securing Data Communications. Gu¨ nter Scha¨ fer Copyright  2003 John Wiley & Sons, Ltd. ISBN: 0-470-86370-6 One of the two keys of a pair can be made public 54 4 Asymmetric Cryptography Asymmetric cryptography favourable for key management This results in important advantages for key management because now only 2·n keys instead of n·(n−1)/2 are needed for secure communication between arbitrary entities from a group of n entities.

It should also be possible for one of these two keys, indicated as +K below, to be made public without the possibility of it being used to calculate the appropriate private key −K or to decrypt a message encrypted with key +K. Expressed in more formal terms, it should not be computationally feasible to use random ciphertext c = E(+K, m) and key +K to compute a plaintext message m = D(−K, c) = D(−K, E(+K, m)). In particular, this implies that it should not be feasible to compute key −K from key +K.

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