Wireless Security

Question 1

What is the problem with security of wireless networks in terms of the channel that wireless networks use?

Answer 1

The channel of communication with wireless security is broadcasting. Broadcasting is easy to eavesdrop and jam.

Question 2

What is the problem with security of wireless networks in terms of the mobility and accessibility of wireless networks?

Answer 2

Access point terminals are more accessible and open to threats

Question 3

What is the problem with security of wireless networks in terms of the resources of wireless networks?

Answer 3

Wireless networks are resourced with limited memory and power therefore it is harder to implement security systems

Question 4

What are some examples of the attack surfaces available in wireless networks?

Answer 4

Endpoints, access points, transmission medium

Question 5

What are potential threats to wireless networks?

Answer 5

MITM, identity theft with MAC spoofing, DoS, network injection

Question 6

How does WEP provide security? Generally and in terms of confidentiality and integrity?

Answer 6

Through encryption
CONF: stream cipher RC4
INT: CRC32

Question 7

How can WEP security be eavesdropped? (CONF threat)

Answer 7

Vulnerability in stream cipher RC4 use of IV

Question 8

Why is the IV vulnerable in the RC4 stream cipher in WEP?

Answer 8

IV is short (24 bits)
IV has problems with IV generation, not random and 50% chance resets after approx 5000 packets
Once IV is found, attacker can find RC4 seed and XOR to obtain plaintext