By Hideki Imai
Addressing the fast-growing have to combine potent safety features into instant communique structures, this state-of-the-art ebook bargains a vast review of instant protection, so engineers can decide upon the equipment and methods which are splendid for his or her initiatives. execs achieve a high-quality realizing of severe cryptography strategies, akin to private/public key encryption, electronic signatures, and block and move ciphers. The ebook offers specialist information on how you can overview cryptography deployment effect on present instant community architectures and enforce an efficient cryptography structure for any association. This forward-looking source bargains the technical knowledge practitioners have to comprehend and paintings with the safety options and methods used for second, third, and 4th new release cellular networks.
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Additional info for Wireless Communications Security
Sample text
While essential to the functioning of the ElGamal cryptosystem, it does not appear in other public-key cryptosystems and does not play a role in the concept of a public-key cryptosystem. However, it guarantees that any observation of the ciphertext does not provide any meaningful information on the corresponding plaintext. For example, if the possible plaintexts are the only two, yes and no, for a given ciphertext, an adversary can try to guess what the plaintext is by comparing the ciphertext with another ciphertext which he generates by encrypting yes.
These include the following: Security Features in Wireless Environment 45 By masquerading, an entity can obtain unauthorized privileges. In a network system, a masquerading user or host may deceive the receiver about its real identity. Masquerading The unauthorized user can access the network system and utilize the resources for its own purpose. Unauthorized Use of Resources This threat involves unauthorized disclosure and illegal flow of information stored, processed, or transferred in a network system both internal and external to the user organizations.
Typically, a serving network has to query the user’s home network for information about the user for security and authentication purpose. 2. The air interface is vulnerable to both active and passive attacks. An active attacker can subvert the communications between the communicating honest entities by injecting, deleting, altering, or replaying messages. A passive attacker can eavesdrop on the communication link to acquire knowledge of the communications. The wireless medium is intrinsically a broadcast-based medium.
