April 2005
Beginner to intermediate
670 pages
22h 56m
English
Content preview from 802.11 Wireless Networks: The Definitive Guide, 2nd EditionBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.
Chapter 7. 802.11i: Robust Security Networks, TKIP, and CCMP
802.1X provides a framework for authentication and key management, which addresses two of the major flaws in the design of WEP. The major remaining flaw to be addressed is the lack of confidentiality provided by WEP encryption. Fixing link layer encryption was taken on by Task Group I of the 802.11 working group. In June 2004, their work was finally complete when the standard was ratified, after several delays.
802.11i takes a two-track approach to addressing the weaknesses in link-layer encryption. Its major components are two new link-layer encryption protocols. The first, the Temporal Key Integrity Protocol (TKIP) was designed to bolster security to the greatest extent possible on pre-802.11i hardware. The second, Counter Mode with CBC-MAC Protocol (CCMP), is a new encryption protocol designed from the ground up to offer the highest level of security possible.
The Temporal Key Integrity Protocol (TKIP)
The first new link layer encryption protocol to be widely implemented was the Temporal Key Integrity Protocol (TKIP).[35] The major motivation for the development of TKIP was to upgrade the security of WEP-based hardware. Typically, chipsets capable of WEP offered hardware support for RC4 encryption. With the heavy lifting of encryption implemented in hardware, software and firmware upgrades make the rest possible. TKIP retains the basic architecture and operations of WEP because it was designed to be a software upgrade ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.