Chapter 21

Symmetric Key Ciphers and Wireless LAN Security

The learning goals for this chapter are as follows:

  • Understand the usefulness and properties of symmetric key ciphers
  • Examine the structure and application of the most popular block ciphers
  • Explore the operation of the popular stream ciphers and contrast their operation with that employed by block ciphers
  • Understand the WLAN security used in 802.11 Wired Equivalent Privacy (WEP) and its weaknesses
  • Understand the 802.11i standards, including Wi-Fi Protected Access (WPA) and WPA2 with AES using pre-shared key (PSK), as well as their weaknesses
  • Understand the mechanisms employed in a side-channel attack and the defensive techniques that are viable

In this chapter the many facets and ramifications ...

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