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1998-10-09 - Re: NT 5.0 and EFS – A victory for widespread use of crypto?

Header Data

From: Adam Shostack <adam@homeport.org>
To: Steve Dunlop <cypherpunks@cyberpass.net
Message Hash: 1dcf12842b0ef6b6ba3771d845ca96f7882a74bc9d9ff14ecd603daedd2499e9
Message ID: <19981009130500.A18749@weathership.homeport.org>
Reply To: <361BF3ED.8111C033@bitstream.net>
UTC Datetime: 1998-10-09 17:25:42 UTC
Raw Date: Sat, 10 Oct 1998 01:25:42 +0800

Raw message

From: Adam Shostack <adam@homeport.org>
Date: Sat, 10 Oct 1998 01:25:42 +0800
To: Steve Dunlop <cypherpunks@cyberpass.net
Subject: Re: NT 5.0 and EFS -- A victory for widespread use of crypto?
In-Reply-To: <361BF3ED.8111C033@bitstream.net>
Message-ID: <19981009130500.A18749@weathership.homeport.org>
MIME-Version: 1.0
Content-Type: text/plain



On Wed, Oct 07, 1998 at 06:06:21PM -0500, Steve Dunlop wrote:

| The white paper on the MSDN web site says it uses
| DESX (no explaination as to what the X is) and an
| RSA public key algorithm to store the symmetric keys,
| which are random for each file.
| 
| So what's DESX?

DESX is where you xor the output of a des block with the key.  Has
some interesting properties which McCurley? showed in Crypto 97
proceedings.

Adam


-- 
"It is seldom that liberty of any kind is lost all at once."
					               -Hume

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