By Praphul Chandra

ISBN-10: 0750677465

ISBN-13: 9780750677462

Finally--a unmarried quantity advisor to actually potent defense for either voice and knowledge instant networks! a growing number of facts and voice communications are going through instant sooner or later among the sender and meant recipient. for that reason, actually "bulletproof" instant safeguard is now greater than a fascinating feature--instead, it is necessary to guard crucial own and enterprise information from hackers and eavesdroppers. during this convenient reference, Praphul Chandra offers the conceptual and useful instruments each RF, instant, and community engineer wishes for high-security instant purposes. ebook evaluate From EDN journal: within this ebook you will discover assurance of those crucial themes: + Cryptographic protocols utilized in instant networks. + Key-based protocols, together with key trade and authentication suggestions + quite a few different types of instant community assaults, together with mirrored image, consultation hijacks, and Fluhrer-Mantin-Shamir (FMS) assaults. + Encryption/decryption criteria and strategies. + Multi-layered protection architectures. + safe sockets layer (SSL) and delivery layer defense (TLS) protocols. + cellphone community architectures and their vulnerabilities. + Modulation suggestions, reminiscent of direct-sequence unfold spectrum (DSSS) and orthogonal frequency department multiplexing (OFDM). and you can additionally locate insurance on such state-of-the-art subject matters as defense ideas for advert hoc networks and maintaining Bluetooth networks. in case you are thinking about instant defense, then this identify belongs in your reference bookshelf!

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Extra resources for BULLETPROOF WIRELESS SECURITY: GSM, UMTS, 802.11, and Ad Hoc Security (Communications Engineering)

Example text

Also interesting is the placement of a web server in a LAN with respect to the firewalls, keeping in mind that web servers are the easiest targets for attacks because of their sheer size and complexity. Placing a web server outside the firewall is definitely a bad idea, since it exposes the web server to all sorts of attacks. However, placing the web server inside the firewall means that if the web server is compromised, it can then be used as a launching pad for attacks on other hosts in the LAN. The typical solution for this problem involves the use of two firewalls.

Used) (Eve) (Bank) 1. A and B negotiate the one-way-hash function they will use. E eavesdrops on this information. 2. Before sending a message, A (or B) computes the hash of the message and attaches it to the message. 3. Eve modifies this message and sends it to B. When B calculates the MAC of the message and compares it to the attached MAC, the two do not match and B, therefore, knows that the message was tampered with. B, therefore, drops this message. 4. If the message is un-tampered, B accepts the message since the MAC he calculates and the MAC attached to the message are identical.

Next we encrypt S0 to obtain S1 (S1 = Ek(S0) and so on. Note that all this can be done off-line both on the sender and the receiver side since it does not require the presence of the plaintext or the ciphertext. When the plaintext message arrives at the sender side, each block can simply be XORed with the appropriate Si to obtain the ciphertext. On the receiver side, the ciphertext is again XORed with the appropriate Si to obtain the plaintext back. Confidentiality, as always, is obtained by keeping the keys (used to generate the pseudorandom string) secret.

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BULLETPROOF WIRELESS SECURITY: GSM, UMTS, 802.11, and Ad Hoc Security (Communications Engineering) by Praphul Chandra

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