I know that gpg is an hybrid system.
I want to know these numbers to check with a mathematica-like program
that numbers supposed to be primes are actually real prime numbers.
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I tried the --with-key-data option which gives the numbers I'm looking
for. Unfortunately, this doesn't work with the secret key.
I tried with pgpdump but it doesn't work anymore because numbers in
secret keys are encrypted.
Is there any way to decrypt these numbers in the secret key?
Le
I know that gpg is an hybrid system.
I want to know these numbers to check with a mathematica-like program that
numbers supposed to be primes are actually real prime numbers.
What is that supposed to tell you? It's not like Mathematica does an
exhaustive check either.
A healthy dose of
On 8/4/11 9:05 AM, Jerome Baum wrote:
What is that supposed to tell you? It's not like Mathematica does an
exhaustive check either.
The PRIMES algorithm can be expressed in Mathematica, and provides an
exhaustive check. Mathematica's built-in tools don't provide PRIMES,
but it can be added by
The PRIMES algorithm can be expressed in Mathematica, and provides an
exhaustive check. Mathematica's built-in tools don't provide PRIMES,
but it can be added by a modestly proficient Mathematica user.
So just a sieve? Isn't that going to take ages on any reasonable key?
--
Jerome Baum
On 8/4/11 9:32 AM, Jerome Baum wrote:
So just a sieve? Isn't that going to take ages on any reasonable key?
No.
http://en.wikipedia.org/wiki/AKS_primality_test
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Ah, I see why you referred to it as the PRIMES algorithm -- was mislead by
a Google search on that string.
Did you manage to get an unencrypted version of the private key?
(Mobile/Handy)
Am 04.08.2011 15:54 schrieb Robert J. Hansen r...@sixdemonbag.org:
On 8/4/11 9:32 AM, Jerome Baum wrote:
Date: Wed, 03 Aug 2011 12:43:17 +0200
From: S?bastien tigresetdrag...@yahoo.fr
Cc: gnupg-users@gnupg.org
Subject: Re: Extract numbers from a key
Message-ID: 4e392645.2020...@yahoo.fr
Content-Type: text/plain; charset=UTF-8; format=flowed
I know that gpg is an hybrid system.
I want to know these
On 8/4/11 10:30 AM, Jerome Baum wrote:
Ah, I see why you referred to it as the PRIMES algorithm -- was
mislead by a Google search on that string.
PRIMES isn't the name of an algorithm: PRIMES is the name of a problem
in computer science. the PRIMES algorithm isn't the algorithm named
PRIMES,
On 04-08-2011 16:14, ved...@nym.hush.com wrote:
All that is necessary, is to use pre-canned primes,
(i.e. to generate a prime which falls within a range of primes
stored in an offsite area by the implementation.)
This would be fat to easy noticed by inspecting the sourcecode. If you
just
On 03/08/11 12:43, Sébastien wrote:
I know that gpg is an hybrid system. I want to know these numbers to check
with a mathematica-like program that numbers supposed to be primes are
actually real prime numbers.
And suppose GnuPG accidentally picked a composite. What would be the security
On 04/08/11 17:11, Johan Wevers wrote:
An even more subtle way to add a backdoor would be tampering with the
RNG that creates the session keys and the factors in key generation. A
bug such as this existed in the Unix version of pgp 5.0 and it took
quite some time before it was found.
Let's
Hello!
We are pleased to announce the availability of a new stable GnuPG-2
release: Version 2.0.18.
The GNU Privacy Guard (GnuPG) is GNU's tool for secure communication
and data storage. It can be used to encrypt data, create digital
signatures, help authenticating using Secure Shell and to
I success to catch the numbers with a blank passphrase and pgpdump.
I found something strange with the number d. The operation e*d mod phi
is not equal to 1, as expected with the RSA algo. I looked in
cipher/rsa.c and I found that d is evaluated to match e*d mod f = 1 ,
with f =
Why is it coded like that ? Is it safe ?
I'm pretty sure there is only one inverse given n and e, that is, d is unique.
Accidentally choosing the wrong d because you made an algorithmic/programming
error will create a non-working keypair. I'd say, since it works, it is correct.
Perhaps the
On 04/08/11 20:30, Peter Lebbing wrote:
Perhaps the better question is: *why* does it work? Why are the operations
equivalent?
H. Per the Handbook of Applied Cryptography 5th ed[1], section 8.5,
computation of d can also be done modulo lambda, with
lambda = lcm(p-1,q-1) =
On Thu, 4 Aug 2011 19:23, tigresetdrag...@yahoo.fr said:
cipher/rsa.c and I found that d is evaluated to match e*d mod f = 1 ,
with f = phi/gcd((p-1),(q-1)) .
Why is it coded like that ? Is it safe ?
Using the universal exponent of n (lambda, in the code denoted as f) has
the advantages that
Hi everybody and thanks for the help.
I recently upgraded my GnuPG setup with a Smart Card (GnuPG Card v2).
I can get/set the information of the card through the root user, but this is
not good for everyday use. I think I have pinpointed the problem, scdaemon
iny my machine doesn't like anybody
On Fri, Aug 05, 2011 at 01:49:21AM +0200, Luis de Bethencourt wrote:
Hi everybody and thanks for the help.
I recently upgraded my GnuPG setup with a Smart Card (GnuPG Card v2).
I can get/set the information of the card through the root user, but this is
not good for everyday use. I think I
Am Freitag, 5. August 2011, 01:49:21 schrieb Luis de Bethencourt:
I can get/set the information of the card through the root user
Notice how I can check the status as root, and do SCD Learn as my user.
But= not
check the status as my user (or sign my mails, which is the main problem).
=
On Fri, Aug 05, 2011 at 12:14:47AM +0200, Hauke Laging wrote:
Am Freitag, 5. August 2011, 01:49:21 schrieb Luis de Bethencourt:
I can get/set the information of the card through the root user
Notice how I can check the status as root, and do SCD Learn as my user.
But= not
check the
Am Freitag, 5. August 2011, 03:02:07 schrieb Luis de Bethencourt:
device in debian:
crw-rw-r--+ 1 root root 189, 516 2011-08-05 00:46 /dev/bus/usb/005/005
device in gentoo:
crw-rw-r-- 1 root pcscd 189, 395 Aug 5 02:56 /dev/bus/usb/004/012
my user is part of the pcscd group. I just
On Fri, Aug 05, 2011 at 01:07:19AM +0200, Hauke Laging wrote:
Am Freitag, 5. August 2011, 03:02:07 schrieb Luis de Bethencourt:
device in debian:
crw-rw-r--+ 1 root root 189, 516 2011-08-05 00:46 /dev/bus/usb/005/005
device in gentoo:
crw-rw-r-- 1 root pcscd 189, 395 Aug 5 02:56
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