Security Basics mailing list archives
RE: ADS Password Storage Protection
From: Harold Winshel <winshel () camden rutgers edu>
Date: Tue, 18 Jul 2006 08:40:44 -0400
Dennis,Yes, I do realize that, but I wonder about two potential problems. One, it consists of real words and two, it's a phrase that probably exists verbatim - punctuation and all - in numerous sources that I figure would be easily digitized. So my question is couldn't something like Bartlett's Book of Quotations, or any other number of compilations of common phrases and sayings, be included as part of a passphrase cracking program?
That is, if a dictionary can be thrown at a password, why couldn't a book of phrases also be thrown at a password?
Harold At 08:35 AM 7/18/2006, Depp, Dennis M. wrote:
The phrase you gave, "frankly, my dear, I don't give a damn" meets most definitions of complexity. I has upper and lower case letters and special characters. Dennis -----Original Message----- From: winshel () camden rutgers edu [mailto:winshel () camden rutgers edu] Sent: Saturday, July 15, 2006 12:25 AM To: security-basics () securityfocus com Subject: Re: RE: ADS Password Storage Protection I've read and heard many sources say this same thing, i.e., that, for windows systems, length is stronger than short and complex. And that a 15 character or longer password can be a real phrase and it will be a secure password. I can see why a long password that consists of a real phrase - such as "frankly, my dear, I don't give a damn" - would be just as secure as an equally long complex password, in terms of protection against a brute force attack. I don't know much about password cracking programs but am surprised that, while they would be working on a brute force attack, they wouldn't be able to try a lot of commonly-used phrases at the same time. If some password cracking programs can use a dictionary attack, couldn't there also be something called a passphrase attack? Would it be difficult for a password cracker to digitize Bartlett's Book of Quotations and include that in an attack on a password? ------------------------------------------------------------------------ --- This list is sponsored by: SensePost Hacking, like any art, will take years of dedicated study and practice to master. We can't teach you to hack. But we can teach you what we've learned so far. Our courses are honest, real, technical and practical. SensePost willl be at Black Hat Vegas in July. To see what we're about, visit us at: http://www.sensepost.com/training.html ------------------------------------------------------------------------ ---
Harold Winshel Computing and Instructional Technologies Faculty of Arts & Sciences Rutgers University, Camden Campus 311 N. 5th Street, Room B36 Armitage Hall Camden NJ 08102 (856) 225-6669 (O) --------------------------------------------------------------------------- This list is sponsored by: SensePostHacking, like any art, will take years of dedicated study and practice to master. We can't teach you to hack. But we can teach you what we've learned so far. Our courses are honest, real, technical and practical. SensePost willl be at Black Hat Vegas in July. To see what we're about, visit us at:
http://www.sensepost.com/training.html ---------------------------------------------------------------------------
Current thread:
- ADS Password Storage Protection rolando_ruiz (Jul 14)
- RE: ADS Password Storage Protection Roger A. Grimes (Jul 14)
- RE: ADS Password Storage Protection rolando_ruiz (Jul 27)
- RE: ADS Password Storage Protection Roger A. Grimes (Jul 31)
- RE: ADS Password Storage Protection rolando_ruiz (Jul 27)
- Re: ADS Password Storage Protection Neil (Jul 17)
- Re: ADS Password Storage Protection Eoin Miller (Jul 17)
- <Possible follow-ups>
- Re: RE: ADS Password Storage Protection winshel (Jul 17)
- Re: ADS Password Storage Protection ab (Jul 17)
- RE: ADS Password Storage Protection Depp, Dennis M. (Jul 18)
- Message not available
- RE: ADS Password Storage Protection Harold Winshel (Jul 18)
- RE: ADS Password Storage Protection Depp, Dennis M. (Jul 18)
- Re: ADS Password Storage Protection Stephen John Smoogen (Jul 21)
- RE: ADS Password Storage Protection Roger A. Grimes (Jul 21)
- RE: ADS Password Storage Protection Roger A. Grimes (Jul 14)
- RE: ADS Password Storage Protection Roger A. Grimes (Jul 19)
- Message not available
- RE: ADS Password Storage Protection Harold Winshel (Jul 21)
- RE: ADS Password Storage Protection Roger A. Grimes (Jul 21)
- Message not available
- RE: ADS Password Storage Protection Harold Winshel (Jul 21)
- RE: ADS Password Storage Protection Roger A. Grimes (Jul 21)
- Message not available
- RE: ADS Password Storage Protection Harold Winshel (Jul 21)
- RE: ADS Password Storage Protection Roger A. Grimes (Jul 21)