Download e-book for iPad: GSM, UMTS, 802.11 and Ad Hoc Security. Bulletproof Wireless by Praphul Chandra

By Praphul Chandra

Finally--a unmarried quantity consultant to truly powerful protection for either voice and information instant networks!

More and extra facts and voice communications are going through instant at some point soon among the sender and meant recipient. for that reason, actually "bulletproof" instant safety is now greater than a fascinating feature--instead, it is necessary to guard crucial own and enterprise information from hackers and eavesdroppers.

In this useful reference, Praphul Chandra provides the conceptual and sensible instruments each RF, instant, and community engineer wishes for high-security instant applications.

  • Inside this booklet you will find assurance of those crucial issues: + Cryptographic protocols utilized in instant networks. + Key-based protocols, together with key alternate and authentication suggestions + a number of varieties 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 safeguard (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 will additionally locate assurance on such state of the art themes as protection options for advert hoc networks and preserving Bluetooth networks. in case you are interested by instant protection, then this name belongs in your reference bookshelf!

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Extra resources for GSM, UMTS, 802.11 and Ad Hoc Security. Bulletproof Wireless Security

Example text

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.

The results of the encryption of the previous blocks are fed into the encryption of the current block. In other words, each block is used to modify the encryption of the next block and therefore each cipher block depends not only on the plaintext that generated it but on all previous plaintext blocks. This property makes it difficult for an attacker to decrypt selected ciphertext blocks. The attacker must have access to the complete session in order to decrypt any one cipher block. Note that chaining forces identical plaintext to map to different ciphertext if and only if some previous plaintext in the session is different.

Firewalls exist because nodes are usually unwilling or incapable of protecting themselves. Nodes unwilling to protect themselves may sound surprising but the fact is that most PCs and UNIX Workstations are sold with a whole bunch of unsecure applications. The insecurity in these applications can be attributed either to bugs (bad programming) or to features (overriding the underlying security mechanisms to make applications more “convenient” for the user). Nodes incapable of protecting themselves include nodes like web servers which handle very high traffic loads and cannot spare the processing power required for security needs.

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