Re: RSA or DSA? That's the question

2007-09-07 Thread Ryan Malayter
On 9/6/07, Oskar L. <[EMAIL PROTECTED]> wrote: > One thing I forgot to mention in that discussion, is that since DSA is the > default, there are probably many more DSA keys in use currently than RSA > keys. (If anyone has any statistics that would be interesting to see.) > Therefore, if a governme

Re: OT // signature verification

2007-09-07 Thread Remco Post
[EMAIL PROTECTED] wrote: > > sorry, > hushmail insisted on duplicating the periods, > there should be only one period instead of two on the lines > indicated, That is because in the smtp protocol, a period on a line by itself (.) signifies the end of a mail message, so _every_ e-mail client _mus

Re: RSA or DSA? That's the question

2007-09-07 Thread Werner Koch
On Fri, 7 Sep 2007 15:15, [EMAIL PROTECTED] said: > Or would you want to read Werner Koch's mail and that of a few other > crypto enthusiasts? Despite its standardization and patent-free This requires support for Elgamal because DSA is used only for signing. Actually DSS (DSA + SHA*) is an natio

Re: old question: invalid trustdb (workarounds on the Internet doesn't work for me)

2007-09-07 Thread Zhang Weiwu
On Tue, 4 Sep 2007, Werner Koch wrote: >> gpg: [don't know]: indeterminate length for invalid packet type 13 >> gpg: keydb_search_first failed: invalid packet > > Are you sure that you copied the keys correctly. The "13" may be an > indication that you forgot to switch the ftp client to binary mod

Re: RSA or DSA? That's the question

2007-09-07 Thread Robert J. Hansen
Ryan Malayter wrote: > A general technique which allows RSA to be broken is far more > valuable than a general break in DSA or ElGamal. Breaking the discrete log problem also breaks the integer factorization problem. IFP can be seen as a special case of the DLP. Breaking DLP breaks every asymmet

Re: RSA or DSA? That's the question

2007-09-07 Thread Robert J. Hansen
Noiano wrote: > First off all thanks for your answers, I have now clearer ideas :-). > For what concerns SHA-1 I read that, thanks to the collisions, an > attacker can modify the message but the signature verification well > be ok. That's not possible today. Today, it would be extraordinarily dif

Re: RSA or DSA? That's the question

2007-09-07 Thread Noiano
Robert J. Hansen wrote: > Noiano wrote: >> First off all thanks for your answers, I have now clearer ideas :-). >> For what concerns SHA-1 I read that, thanks to the collisions, an >> attacker can modify the message but the signature verification well >> be ok. > > That's not possible today. Toda

Re: RSA or DSA? That's the question

2007-09-07 Thread Robert J. Hansen
Noiano wrote: > In my openpgp preferences in thunderbird I've tried to set sha-256 but I > got an error saying it was only possible to use sha-128. What went wrong? Beats me, but I'm sure the other Enigmail users on-list will chime in with helpful advice. > 0_0 I didn't know thatwhat a bad ne

Re: How to use GnuPG to generate sha512sum hash?

2007-09-07 Thread Moses
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Thank you very much, I'm using Cygwin now.. :) -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.3 (MingW32) Comment: http://firegpg.tuxfamily.org iD8DBQFG4iYmHuqxyCZQdwkRAniwAJwO5bpGZ/TpYL3mRBcmobSHT82m8gCcDexc W+M7K0EIVEX/GgQu8xkWv78= =RJnh