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

By Praphul Chandra

Finally--a unmarried quantity advisor to truly powerful defense for either voice and knowledge instant networks! increasingly more information and voice communications are going through instant at some point soon among the sender and meant recipient. for that reason, really "bulletproof" instant protection is now greater than a fascinating feature--instead, it's necessary to guard crucial own and enterprise info from hackers and eavesdroppers. during this convenient reference, Praphul Chandra delivers the conceptual and useful instruments each RF, instant, and community engineer wishes for high-security instant purposes. ebook evaluation From EDN journal: within this ebook you will discover assurance of those crucial subject matters: + Cryptographic protocols utilized in instant networks. + Key-based protocols, together with key alternate and authentication suggestions + quite a few forms 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. + cellphone community architectures and their vulnerabilities. + Modulation strategies, comparable to direct-sequence unfold spectrum (DSSS) and orthogonal frequency department multiplexing (OFDM). and you can additionally locate insurance on such state-of-the-art issues as protection concepts for advert hoc networks and holding Bluetooth networks. in case you are interested by instant defense, 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 (Communications Engineering)

Example text

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.

Another advantage of this scheme is that it automatically achieves confidentiality in both directions. 2 Integrity Suppose that A is sending encrypted messages to B. When Eve gets access to the transmission medium between A and B, she starts accessing the messages that A is sending to B over the medium. Although Eve (E) is not able to make any sense of the packets that she is intercepting (since the messages are encrypted), E randomly starts modifying these messages on the fly. When B receives the messages, he has no way of knowing that the message has been tampered with, so he continues to process these messages.

Using standardized algorithms also ensures interoperability with products from other manufacturers. Keep in mind that the fact that the inner working of the cipher is a matter of public knowledge is not as bad as it sounds since the security of the system lies in the secrecy of the keys and not the secrecy of the cipher itself. A “strong” algorithm should have the following characteristics: • Patterns in plaintext should be concealed. Plaintext has linguistic patterns. Examples of this are—some letters occur more frequently than other; some pairs of letters occur very frequently and some letters occur only in certain pairs.

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