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01 - 02 - 03 - 04 - 05 - 06 - 07 - 08 - 09 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - In Microsoft Kerberos, a session ticket is also required for access to services on local systems. The same process takes place for access to local resources; the LSA builds a local access token from the PAC contained in the session ticket. Summary Windows 2000 supports several authentication protocols, including Windows NT LAN Manager, Kerberos v5, Distributed Password Authentication, Extensible Authentication Protocol, and Secure Channel. The two protocols used for network authentication, for logging on locally or as an interactive user, are NTLM and Kerberos v5. Kerberos is the default authentication protocol used in Windows 2000; NTLM is provided for backward compatibility and is also used to authenticate Windows 2000 member and stand-alone servers. Kerberos provides several advantages over NTLM, which was the authentication protocol of choice in previous versions of Windows NT. One of the advantages is that Kerberos provides mutual authentication wherein the client can also verify the identity of the server, which cannot be accomplished using NTLM. Another advantage is that Windows 2000 Kerberos domains can communicate with Kerberos realms of other implementations of Kerberos. This cannot be accomplished with NTLM, which is proprietary to Microsoft operating systems. Kerberos is made up of several components, including the Key Distribution Center, session tickets, and ticket-granting tickets. The Key Distribution Center is comprised of two services, the Authentication Service and the Ticket-Granting Service. Three subprotocols used by Kerberos are the Authentication Service Exchange, the Ticket-Granting Service Exchange, and the Client/Server Exchange. Microsoft implements its own flavor of Kerberos in Windows 2000. Microsoft Kerberos adds extensions to the Kerberos standard to meet specific requirements necessary for Windows 2000, such as the capability to use public key certificates instead of the normal shared key to log on to Windows 2000 domains. Microsoft implements the KDC as a service in Windows 2000, and the service is automatically installed on all domain controllers. Microsoft Kerberos stores the Privilege Attribute Certificate in tickets. The PAC consists of the user’s SID as well as group SIDs for the groups of which the user is a member. The PAC is extracted after the server authenticates the identity of the user. The server then uses the PAC to create an impersonation 01 - 02 - 03 - 04 - 05 - 06 - 07 - 08 - 09 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - |
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-Windows 'zero-day' flaw fixes released
G Data and Sophos launch temporary security patches to prevent criminals exploiting .LNK shortcut vulnerability Two software security companies today released temporary security patches for the Windows 'zero-day' vulnerability affecting all versions of the Microsoft operating system back to Windows 2000. The security flaw acknowledged by Microsoft can affect someone who simply opens a ...
-Microsoft: All Hotmail users could get update in a week
Microsoft on Tuesday said the "Wave 4" update to Hotmail has now been rolled out to 100 million users of the Windows Live e-mail service. "We expect to upgrade nearly all of our customers within the next week" Microsoft's Mike Schackwitz said in a blog post. Read about the new Hotmail features in my May report.
-Safari Extensions Now Available Through Browser Update [Safari
# safari Windows/Mac: Safari 5.0.1 is out and it's much more than just a bug fix. Installing the update activates Safari's new extensions platform which has roughly 100 extensions available through the Safari Extensions Gallery . More »
-CrossOver CrossOver Games 9.1 released
These utilities allow some Windows apps and games to run on a Mac without Windows itself. Major updates bring support for more apps and games as well as a core software update that includes more than 23000 changes.
-HP confirms Windows 7 and WebOS tablet plans
Hewlett-Packard will use Windows 7 in a tablet exclusively for enterprises while making a consumer-oriented unit based on WebOS Personal Systems Group executive Phil McKinney confirmed Wednesday at the annual AlwaysOn Stanford Summit.
-UPDATE: Gunman barricaded at Homestyle Inn in Manassas
It was not immediately clear if anyone had been injured but some windows were shot out at the Homestyle Inn at 9913 Cockrell Road said Manassas police spokesman William Goodman.
-Report Details Hottest IT Investments
Windows 7 desktop virtualization and unified computing lead the pack in Computer Economics' report. But investment in some other well-known technologies is stalled.
-How to run Windows and OS X on the same Mac
OS X or Windows? Run them both on the same machine without any trouble.
-UPDATE: Fontana man who died in police custody is identified
A man died in police custody after causing a disturbance in a neighborhood in the northwestern corner of Fontana in the early morning hours of July 26 according to the Fontana Police Department.
-Black Hat Conference Update: Expert Says Critical System Flaws are Dangerous
A Black Hat conference presenter on Wednesday said that security issues in critical infrastructures can affect almost every person. Post from: Daily Contributor Black Hat Conference Update: Expert Says Critical System Flaws are Dangerous
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