BULLETPROOF WIRELESS SECURITY: GSM, UMTS, 802.11, and Ad Hoc by Praphul Chandra

By Praphul Chandra

Finally--a unmarried quantity consultant to truly powerful protection for either voice and information instant networks! increasingly more information and voice communications are going through instant at some point soon among the sender and meant recipient. consequently, actually "bulletproof" instant safeguard is now greater than a fascinating feature--instead, it is necessary to guard crucial own and enterprise info from hackers and eavesdroppers. during this convenient reference, Praphul Chandra delivers the conceptual and sensible instruments each RF, instant, and community engineer wishes for high-security instant purposes. e-book evaluation From EDN journal: http://www.edn.com/article/CA632302.html?industryid=2817 within this booklet you can find insurance of those crucial themes: + Cryptographic protocols utilized in instant networks. + Key-based protocols, together with key alternate and authentication strategies + a variety of kinds of instant community assaults, together with mirrored image, consultation hijacks, and Fluhrer-Mantin-Shamir (FMS) assaults. + Encryption/decryption criteria and techniques. + Multi-layered protection architectures. + safe sockets layer (SSL) and delivery layer defense (TLS) protocols. + cellphone community architectures and their vulnerabilities. + Modulation innovations, akin to direct-sequence unfold spectrum (DSSS) and orthogonal frequency department multiplexing (OFDM). and you may additionally locate insurance on such state of the art themes as safeguard innovations for advert hoc networks and keeping Bluetooth networks. if you are desirous about instant safeguard, then this identify belongs in your reference bookshelf!

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Extra info for BULLETPROOF WIRELESS SECURITY: GSM, UMTS, 802.11, and Ad Hoc Security

Example text

A one-way function is a function f such that it is easy to compute f(x) for any given x but it is very hard to compute x for a given f(x). “Very hard” usually means that it takes a very long time with current computer power standards to calculate x from f(x). An example of a one-way function is the square of a number. It is easy to compute the square of a number but it is much harder to compute the root of a number. However, calculating the roots is not hard enough to be used in cryptography. A trap-door one-way function is a one-way function with the peculiarity that it becomes easy to calculate x from f(x) if and only if we know a secret key.

If somebody was geeky enough to connect to the Internet, they had the right to use it anyway they wanted. With the commercialization of the Internet came a big boom in the number of users. Along with this boom, however, came security concerns. These security concerns grew manifold with the coming of age of e-commerce. Today, users use their credit card over the Internet as much as they use it over the telephone. What are the security expectations of such users? Let’s consider this with a concrete example.

Bank) A and B agree on a cryptosystem (cipher to be used). A sends its public key to B. Let’s call this key K1. B sends a random number to A. A encrypts this random number with its own private key and sends this to B. B decrypts the received message using K1 (A’s public key). If B finds that it is successfully able to decrypt and obtain the random number it sent, B is ensured that it is talking to A. 11: Challenge-Response 12 Security and Cryptography decrypting the response. If this is verified, B authenticates A.

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