Prince Sultan University
College of Computer & Information Sciences
Department of Computer Science
CS432: Computer Security
Tutorial 5: Hash Functions & Wireless security
1- What are cryptographic hash functions, and for what purposes are they used?
2- What are the main required properties of cryptographic hash functions?
3- Discuss the use of hash functions in SSL (at what steps and for what purpose?).
4- Describe the MD5 hash algorithm.
5- Describe the SHA1 hash algorithms.
6- Give a general overview of the authentication process in 802.11 networks.
7- Explain how basic authentication may be performed using SSID’s and MAC filters in
wireless LANs. What are the major drawbacks of this scheme?
8- Describe the WEP security protocol. What are the major parameters, and what is the
encryption algorithms used?
9- What are the major types of authentication provided by WEP?
10- Explain how open authentication works.
11- Explain how shared key authentication works.
12- What are the major drawbacks of WEP?
13- What is 802.1x and what does it do?
14- Describe the general architecture of 802.1x and explain how it works.
15- What is WPA and how it works.
16- Describe the 802.11i security protocol and highlight its improvements over WEP.