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MSFT Bans insecure hashes - was"Passwords with Lan Manager (LM) under Windows"
From: "Craig Wright" <cwright () bdosyd com au>
Date: Fri, 23 Sep 2005 13:52:50 +1000

First the quote from the MSFT program manager

"Microsoft is banning certain cryptographic functions from new computer
code, citing increasingly sophisticated attacks that make them less
secure, according to a company executive. The Redmond, Wash., software
company instituted a new policy for all developers that bans functions
using the DES, MD4, MD5 and, in some cases, the SHA1 encryption
algorithm, which is becoming "creaky at the edges," said Michael Howard,
senior security program manager at the company, Howard said."

"All three algorithms show signs of 'extreme weakness' and have been
banned, Howard said. Microsoft is recommending using the Secure Hash
Algorithm (SHA)256 encryption algorithm and AES (Advanced Encryption
Standard) cipher instead, he said.

Quote when hearing about this 
"It's about time," Bruce Schneier of Counterpane Security Inc "Microsoft
have ended use of DES, MD4 and MD5 years ago"

To answer "And I'm not sure where you are getting your info regarding
Microsoft "dropping NTLMv2 for backward compatibility.""...
Don't take my word for it...




For those who still believe MD5 collisions are just theory


PS NTLMv2 uses MD4 and HMAC_MD5 - these are not going to be supported.
MSFT is moving to AES and SHA256 - so I guess it might be time for some
people still on Windows 98 or NT 4.0 to finally move on. 

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