| Wireless network have standard 802.11 which include Wired Equivalent Protocol (WEP). This protocol is used to protect link-layer communications from eavesdropping and other attacks. This standard has several serious security flaws in the protocol which presents unacceptable risks. As a result, many of the organizations deploying wireless networks use either a permanent fixed cryptographic variable, or key, or no encryption whatsoever.; Organizations over the last few years have expended a considerable effort to protect their internal infrastructure from external compromise. As a result, the organizations have canalized their external network traffic through distinct openings protected by firewalls. By limiting external connections to a few well protected openings, the organization can better protect itself. Unfortunately, the deployment of a wireless network opens a "back door" into the internal network that permits an attacker access beyond the physical security perimeter of the organization. As a result, the attacker can implement the "parking lot" attack.; This paper will discuss the flaws of 802.11 and the evolution of 802.16, WPA and other authentication which improved the existing 802.11 security. Towards the end of this paper we also shed some light on how wireless security is used in healthcare systems in today's world. |
