June 2011
Beginner
372 pages
9h 54m
English
Content preview from Microsoft® Windows® Security: EssentialsBecome 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,
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Identifying Unsecure Authentication Protocols
Some older authentication protocols are considered unsecure, and you should avoid using them. The first step in ensuring that these protocols aren’t used is identifying them. The following sections identify issues with LAN Manager (LM) and New Technology LAN Manager version 1 (NTLMv1)authentication protocols. NTLMv2 is preferred over both LM or NTLMv1.
LM
LAN Manager (LM) is a very old authentication protocol that is still used by some applications today. The biggest weakness with LM is in how it stores passwords. LM-stored passwords are easily discoverable by hacking tools.
LM first converts the password to all uppercase and then adds null values to extend the password to 14 characters. For example, ...
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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.