Re: It's a Presidential Mandate, Feds use it. How come you are not using FDE?

2007-01-18 Thread Saqib Ali
Algorithms can be perfect and implementation sloppy. If you can review the code you might find the problem, but with proprietary code, fergetit. I think you guys are missing the point. The term "Snake-Oil Crypto" refers to the algorithm and NOT the actual implementation. This is a "important" di

Real-world password guessing

2007-01-18 Thread Steve Schear
http://dilbert.com/comics/dilbert/archive/dilbert-20070117.html http://dilbert.com/comics/dilbert/archive/dilbert-20070118.html - The Cryptography Mailing List Unsubscribe by sending "unsubscribe cryptography"

Re: Private Key Generation from Passwords/phrases

2007-01-18 Thread Perry E. Metzger
John Denker <[EMAIL PROTECTED]> writes: > There is only one technical definition of entropy, Oh? So you're saying Chaitin-Kolmogrov information and other ways of studying entropy are "wrong"? I think that's a bit unreasonable, don't you? There are different definitions that are useful at differ

Re: It's a Presidential Mandate, Feds use it. How come you are not using FDE?

2007-01-18 Thread Allen
Saqib Ali wrote: Since when did AES-128 become "snake-oil crypto"? How come I missed that? Compusec uses AES-128 . And as far as I know AES is NOT "snake-oil crypto" Saqib, I believe you are correct as to the algorithm, but the snake-oil is in the implementation, As I have often said, "A

Re: Private Key Generation from Passwords/phrases

2007-01-18 Thread John Denker
On 01/18/2007 03:13 PM, David Wagner wrote: > In article <[EMAIL PROTECTED]> you write: >> The /definition/ of entropy is >> >> sum_i P_i log(1/P_i) [1] >> >> there the sum runs over all symbols (i) in the probability >> distribution, i.e. over all symbols in the ensembl

Re: It's a Presidential Mandate, Feds use it. How come you are not using FDE?

2007-01-18 Thread Damien Miller
On Thu, 18 Jan 2007, Saqib Ali wrote: > Since when did AES-128 become "snake-oil crypto"? How come I missed > that? Compusec uses AES-128 . And as far as I know AES is NOT > "snake-oil crypto" It is even easier to use a good cryptographic transform in a way that is utterly insecure then it is to

Private Key Generation from Passwords/phrases

2007-01-18 Thread David Wagner
In article <[EMAIL PROTECTED]> you write: >The /definition/ of entropy is > > sum_i P_i log(1/P_i) [1] > >there the sum runs over all symbols (i) in the probability >distribution, i.e. over all symbols in the ensemble. > >Equation [1] is the gold standard. It is always c

Re: It's a Presidential Mandate, Feds use it. How come you are not using FDE?

2007-01-18 Thread Chris Kuethe
On 1/18/07, Saqib Ali <[EMAIL PROTECTED]> wrote: Since when did AES-128 become "snake-oil crypto"? How come I missed that? Compusec uses AES-128 . And as far as I know AES is NOT "snake-oil crypto" He didn't say that AES is snake oil. He says he wants assurance that the tool operates correctly.

Re: Private Key Generation from Passwords/phrases

2007-01-18 Thread John Denker
On 01/17/2007 06:07 PM, Allen wrote: > The whole issue of entropy is a bit vague for me - I don't normally work > at that end of things - so could you point to a good tutorial on the > subject, or barring having a reference handy, could you give an overview? Entropy is defined in terms of probab

Re: It's a Presidential Mandate, Feds use it. How come you are not using FDE?

2007-01-18 Thread Saqib Ali
Since when did AES-128 become "snake-oil crypto"? How come I missed that? Compusec uses AES-128 . And as far as I know AES is NOT "snake-oil crypto" Closed-source doesn't mean that it is "snake-oil". If that was the case, the Microsoft's EFS, and Kerberos implementation would be "snake oil" too.

Re: It's a Presidential Mandate, Feds use it. How come you are not using FDE?

2007-01-18 Thread Jonathan Thornburg
On Wed, 17 Jan 2007, Saqib Ali wrote: [[addressed to Steven Bellovin, but copied to the whole list]] > I would like to invite you to try out a Free FDE product called > Compusec < http://www.ce-infosys.com/ > If I have data that's valuable enough to need encryption, I'm going to be nervous trustin

Re: It's a Presidential Mandate, Feds use it. How come you are not using FDE?

2007-01-18 Thread Anne & Lynn Wheeler
Steven M. Bellovin wrote: Not necessarily -- many of my systems have multiple disk drives and file systems, some of which are on removable media. Apart from that, though, this is reinforcing my point -- what is the threat model? PC/RT had external scsi disk drive housing ... with scsi disk dri

Re: Private Key Generation from Passwords/phrases

2007-01-18 Thread Joseph Ashwood
I'm going to try to make this one a bit less aggregious in tone. I'm also going to sometimes use (3DES) and (ECC) for designation of work and time measurements. - Original Message - From: "Matthias Bruestle" <[EMAIL PROTECTED]> Cc: Sent: Monday, January 15, 2007 2:31 AM Subject: Re: Pr

Re: Private Key Generation from Passwords/phrases

2007-01-18 Thread Allen
Joseph, The whole issue of entropy is a bit vague for me - I don't normally work at that end of things - so could you point to a good tutorial on the subject, or barring having a reference handy, could you give an overview? Thanks, Allen Joseph Ashwood wrote: - Original Message - F