Wireless Security (LANLock Design)

Wireless Security (LANLock Design)

Design of LAN-Lock,
A System for Securing Wireless Networks

This article talked about the design of a secure wireless network. The designers wanted to create a wireless network that: ran under Windows 95 or NT, is compatible with the Raylink WLAN product, uses Fortezza cryptographic PCMCIA cards, provides communication between wireless hosts using Fortezza cards and wired hosts not using Fortezza cards, compatible with all Windows applications, transparent, and have minimal impact on communication performance.
To design this system the group had to determine which level they were going to use to encrypt and decrypt packets. The group decided to use the LSP (Layered Service Provide) level. They did not use the data link level because it would have had to modify the WLAN interface driver on the interface card of all users and when drivers were updated they would have to be modified for everyone. They decided not to use the IP or TCP levels because they did not have access to the protocol source code used by Microsoft. The LSP level is below the WinSock– an application programming interface that lets a Windows program send data over any network transport protocol– and above

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