Wireless Network Security

How Does Wireless Differ? Wireless networks are inherently insecure because data is transmitted over a very insecure medium, the air.

Security Concerns  Types of attacks  Passive Attacks  Eavesdropping  Active Attacks  Registration of a Malicious Node  Replay Attack  Denial of Service  Common flooding  Rogue access point  Man in the Middle Attacks  Types of attacks  Passive Attacks  Eavesdropping  Active Attacks  Registration of a Malicious Node  Replay Attack  Denial of Service  Common flooding  Rogue access point  Man in the Middle Attacks

Goals  Availability  Require network assets are available when needed and ensure the survivability of the network services despite DOS attacks  Confidentiality  Ensure that certain information is never disclosed to unauthorized entities  Routing information must also remain secure  Integrity  Guarantees that the information being transferred is never altered  Availability  Require network assets are available when needed and ensure the survivability of the network services despite DOS attacks  Confidentiality  Ensure that certain information is never disclosed to unauthorized entities  Routing information must also remain secure  Integrity  Guarantees that the information being transferred is never altered

Challenges  Attacks can come from all directions and target any node  Damage can include leaking secret information, interfering message delivery and impersonating nodes  Have inadequate physical protection and therefore the network can be more easily compromised  Attacks can come from all directions and target any node  Damage can include leaking secret information, interfering message delivery and impersonating nodes  Have inadequate physical protection and therefore the network can be more easily compromised

Solutions  MD5 with 128-bit encryption  Keeps information confidential  With a shared random number prevents replay attacks  Prevent unauthorized access using MAC filtering  Physical security  Secure the building and shield it from outside interference  MD5 with 128-bit encryption  Keeps information confidential  With a shared random number prevents replay attacks  Prevent unauthorized access using MAC filtering  Physical security  Secure the building and shield it from outside interference