Re: [lists] re: Signing vs. encrypting was: Cipher v public key

2006-06-04 Thread Graham
On Thu, 01 Jun 2006 11:33:14 -0400
[EMAIL PROTECTED] wrote:

  While I prefer gnupg to pgp myself, I did just happen to see a
  reference to pgp command line today
 
 the cost is *astronomical*
 
 have played around with it when it was released as a free
 command line pgp 8.5 beta
[snipped]

AFAIK this is the latest PGP command line version available - except
for server based systems, which is why the cost is *astronomical*.

When Network Associates sold the rights to PGP to PGP Corporation, they
kept the rights to the command line version, and unless things have
changed this is why PGP Corporation don't offer it.

But why bother when there is GPG?

-- 

Graham



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Re: Signing vs. encrypting was: Cipher v public key

2006-06-02 Thread Janusz A. Urbanowicz
On Thu, Jun 01, 2006 at 11:33:14AM -0400, [EMAIL PROTECTED] wrote:
 Todd Zullinger tmz at pobox.com wrote on
 Thu Jun 1 11:46:48 CEST 2006 :
 
  While I prefer gnupg to pgp myself, I did just happen to see a
  reference to pgp command line today
 
 the cost is *astronomical*
 
 have played around with it when it was released as a free
 command line pgp 8.5 beta
 
 has a few features unique to pgp,
 which may or may not be of interest to the customers:
 
 - ADK's

This may be somewhat emulated with GPG (mandated encrypt-to)
 
 - split-key / shared-key capablilty
 (this happens to be nice and useful
 any chance for a 'feature request' :-)  ?  )

I once thought of implementing this over gpg -- but it is notrivial to
do it right and really it is a specialized application somewhat
requiring a dedicated machine trusted by all the untrusting parties,
to operate.

A;ex

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Re: Signing vs. encrypting was: Cipher v public key.

2006-06-01 Thread Janusz A. Urbanowicz
On Wed, May 31, 2006 at 01:59:37PM +0100, David Gray wrote:
 
 Will suggest to the customer that we use signed  encrypted
 transmissions.  The only Issue we then have is that they wish to be
 custodians of the private key,

There is no need for them, from the cryptography point of view. Using
public-key crypto they can send you encrypted stuff and you can send
them encrypted stuff and the second party can decrypt what they are
sent without knowing the sender's secret key - thats what pubkey
crypto is for. If they want to be sure that they can decrypt
everything, the encrypted data should be encrypted to both recipients'
pubkeys (thats perfectly possible using GPG/PGP).

 they are Looking into commerical methods for secure key
 distribution.
 
direct them to commercial solutions for quantum cryptography :-

 The other issue is the IT manager at the customer site is wary of Gnu
 software and is 
 Going to look at commerical offering, PGP I assume.  Apart from the lack 
 Of cost are there any other good reason I can give for using GPG? 

gpg integrates better with autimation and I really doubt that there is
current, supported PGP for anything else than windows and mac.

Alex


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Re: Signing vs. encrypting was: Cipher v public key.

2006-06-01 Thread Todd Zullinger
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Janusz A. Urbanowicz wrote:
 gpg integrates better with autimation and I really doubt that there is
 current, supported PGP for anything else than windows and mac.

While I prefer gnupg to pgp myself, I did just happen to see a
reference to pgp command line today.  Here are the platforms it
supports:

 * Windows 2003
 * Windows XP SP1
 * Windows 2000 SP4
 * HP-UX 11i or above (PA-RISC only)
 * IBM AIX 5.2 or above
 * Red Hat Enterprise Linux 3.0 or above (x86 only)
 * Solaris 8 or above (SPARC only)
 * Mac OS X 10.3 or above

http://download.pgp.com/products/pdfs/PGP_CL902_DS_050825_F.pdf

Not a terribly small list, except when compared to what gnupg will run
on. :)

- -- 
ToddOpenPGP - KeyID: 0xD654075A | URL: www.pobox.com/~tmz/pgp
==
The man who is a pessimist before forty-eight knows too much; the man
who is an optimist after forty-eight knows too little.
-- Mark Twain

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re: Signing vs. encrypting was: Cipher v public key

2006-06-01 Thread vedaal
Todd Zullinger tmz at pobox.com wrote on
Thu Jun 1 11:46:48 CEST 2006 :

 While I prefer gnupg to pgp myself, I did just happen to see a
 reference to pgp command line today

the cost is *astronomical*

have played around with it when it was released as a free
command line pgp 8.5 beta

has a few features unique to pgp,
which may or may not be of interest to the customers:

- ADK's

- split-key / shared-key capablilty
(this happens to be nice and useful
any chance for a 'feature request' :-)  ?  )

- platform-specific self-decrypting archives,
(a windows user can make an sda specifically for a mac or linux 
user,
but not an sda that works on both)
(this was added in 9.x)

other than that,
it is a very unforgiving and difficult command line to use,
radically different from 6.5.8 or 2.x

it is set up for 'no prompting'
so unless all the options are anticipated and entered in the 
original command,
it won't work

would absolutely *NOT* recommend it,
unless someone _must_ use a CLI with ADK capability


vedaal




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RE: Signing vs. encrypting was: Cipher v public key.

2006-05-31 Thread David Gray

Hi, 

Thanks to all who have responded to these questions.  Getting my head around
it 
Now.  

Will suggest to the customer that we use signed  encrypted transmissions.
The only 
Issue we then have is that they wish to be custodians of the private key,
they are 
Looking into commerical methods for secure key distribution. 

The other issue is the IT manager at the customer site is wary of Gnu
software and is 
Going to look at commerical offering, PGP I assume.  Apart from the lack 
Of cost are there any other good reason I can give for using GPG? 

Thanks 
Dave 
 

-Original Message-
From: Andreas Martin [mailto:[EMAIL PROTECTED] 
Sent: 31 May 2006 10:31
To: gnupg-users@gnupg.org
Subject: Signing vs. encrypting was: Cipher v public key.


-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

Laurent Jumet schrieb:
  When sending a message like this one, signed, compressed but not
crypted,
 is there anything that goes bad, in security terms?
 This is to avoid problems with line lenghth and charsets through 
 internet
 

In security terms, lots of things can go bad when sending anything through
the internet ;-)

Encrypting protects against unauthorised reading of the plaintext, but not
from manipulating the encrypted data. Signing protects against manipulation
of the data, but not against unauthorised reading of the plaintext. (In fact
it does not avoid the manipulation itself, but you are able to detect, that
the data has been manipulated).

Signing and encrypting are two totally different things (not to mention
compressing). So if you want save transmissions you have to do both,
signing and encrypting!

Problems with line length and charset shouldn't occur during the
transmission of your mails, because Mail Transport Agents don't take care of
the mailbody (and the headers are not signed or encrypted). What exactly do
you want?

Regards


Andreas

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