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

By Praphul Chandra

Finally--a unmarried quantity advisor to truly powerful safeguard for either voice and knowledge instant networks! progressively more facts and voice communications are going through instant sooner or later among the sender and meant recipient. hence, actually "bulletproof" instant protection is now greater than a fascinating feature--instead, it is necessary to guard crucial own and company facts from hackers and eavesdroppers. during this convenient reference, Praphul Chandra provides the conceptual and functional instruments each RF, instant, and community engineer wishes for high-security instant purposes. ebook evaluate From EDN journal: http://www.edn.com/article/CA632302.html?industryid=2817 within this publication you will discover assurance of those crucial themes: + Cryptographic protocols utilized in instant networks. + Key-based protocols, together with key trade and authentication innovations + 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 safeguard architectures. + safe sockets layer (SSL) and delivery layer protection (TLS) protocols. + cell phone community architectures and their vulnerabilities. + Modulation strategies, resembling direct-sequence unfold spectrum (DSSS) and orthogonal frequency department multiplexing (OFDM). and you may additionally locate insurance on such state-of-the-art subject matters as protection concepts for advert hoc networks and conserving Bluetooth networks. if you are fascinated with instant defense, then this name belongs in your reference bookshelf!

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In other words, the security in these systems is based on the key and not on the details of the algorithm. This is also much easier to implement, since keeping a number secret is much more easier than keeping an algorithm secret. A key is one of a large number of values. The set of values from which the key can be selected is known as the keyspace. The larger the keyspace, the more secure is the key since the key would be harder to guess (break). 1 Symmetric Key Cryptography Keys can be used symmetrically or asymmetrically.

The strength of the algorithm itself depends on the mode in which it is used. Different modes of an algorithm are suitable for various situations and needs, but the mode should not compromise the security of the underlying algorithm. 12: ECB Mode This is the simplest and the most obvious mode for block ciphers. Data is divided into 64-bit blocks and is fed to the cipher which produces the corresponding ciphertext. Each block is encrypted separately and therefore the operation can be carried out in parallel.

2. 3. 4. (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. A encrypts the message it sends to B with its own private key. B decrypts the received message using K1 (A’s public key). If B is able to successfully decrypt the message, B can be sure that it is talking to A since only A has its own private key. 10: Digital Signatures Practical implementations of authentication do not involve encrypting the whole message with the private key, since this may take a long time.

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