Question

Password dictionary files

Asked by: CompuTurk

I am looking for a tool that will test my password against dictionaries using brute-force attack.  Any recommendations would be appreciated.


Thanks...
-Computurk

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Asked On
2003-10-10 at 07:06:59ID20763003
Tags

dictionary

,

password

,

files

Topic

Unix Network Security

Participating Experts
5
Points
50
Comments
8

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Answers

 

by: sunray_2003Posted on 2003-10-10 at 07:12:44ID: 9527816

Computurk ,


Sorry answering these kind of questions is totally against EE agreement ....


Sunray

 

by: jleviePosted on 2003-10-10 at 14:37:56ID: 9530458

A brute-force approach and a dictionary approach are two completly different methods. The former simply tries all combinations of characters starting with a single character password and working up to longer lengths. The later uses only words from a dictionaly in various combinations.

Since you've asked for a tool to "test my password" presumably you know what the plaintext is. To determine whether it is subject to a dictionary attack it is simply a matter of checking to see if the password is composed of one or more words. Whether it is subject to a brute -orce attack is a function of how long the password is and what encryption method is used. A DES password is probably crackable, but an 8 char or more MD5 password probably isn't.

 

by: TintinPosted on 2003-10-12 at 18:57:33ID: 9537501

sunray_2003,

What part of the EE agreement does this question breaK?

CompuTurk,

If you are on a Unix system, npasswd has tools to check a password against a configurable set of dictionaries and rules, without having to update the password itself.

See http://www.utexas.edu/cc/unix/software/npasswd/

 

by: sunray_2003Posted on 2003-10-13 at 09:21:43ID: 9541264

Check in here

http://www-tcsn.experts-exchange.com/memberAgreement.jsp

This is equivalent to cracking .. We are not supposed to give guidelines to questions that would help to crack passwords.

If you are not convinved post in CS

Sunray

 

by: TintinPosted on 2003-10-13 at 13:03:42ID: 9542780

sunray_2003,

I've read through the guidelines a number of times and can not see anything specific about password cracking.  Could you please post the specific paragraph you are referring to.

There are quite legitimate purposes for wanting to test your password strength.  It's not as if CompuTurk was asking how to crack all the passwords on their system.

 

by: CompuTurkPosted on 2003-10-13 at 18:18:15ID: 9544050

I was able to add @ and ! signs to my password to make it hard to crack.  Unfortunately, some of the web admin interfaces for our Cisco switches etc does not like the escape characters, so with number and letter combination I was able to accomplish the same security as I would use escape characters.

Thank you Tintin, I will look in to your reference and check it against that also. Thanks for the tip jlevie.

-CompuTurk

 

by: iron_mousePosted on 2004-04-14 at 21:56:14ID: 10830071


 ... paraphrasing from "Mac OS X Security" (Potter, Norvell, Wotring):

"John the Ripper is a brute force password cracking command line tool.  Given a password file, the tool attempts to decrypt and uncover passwords.  Initially, a dictionary attack is made ... if this fails, a brute force attack is conducted which involves trying all possible character combinations."

John the Ripper is not included with Mac OS X but can be downloaded and compiled for testing purposes from http://www.openwall.com/john

iron_mouse

 

by: mgbyrne2004Posted on 2004-07-07 at 18:10:35ID: 11497901

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