Does the term "distributed workload" refer to multiple computers working in unison on the same task? Because i would think that if trying to crack passwords that multiple systems (perhaps a computer lab) would be the way to go. If that's what it means then, i would like to know of any programs that use distributed workloads other than cracking software. And even some info on how people program code to do that. Is it some sort of P2P software? I know awhile back there were some researchers using peoples screensavers to do cancer research... -Andrew <div class="gmail_quote">On Mon, Oct 5, 2009 at 8:14 PM, Neal McBurnett <<a href="mailto:neal@bcn.boulder.co.us">neal@bcn.boulder.co.us</a>> wrote: <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><a href="http://pdfcrack.sourceforge.net/faq.html" target="_blank">http://pdfcrack.sourceforge.net/faq.html</a> says it can be done: ---- Does PDFCrack support distributed and/or multicore/multicpu-systems? Not yet. The project is open for contributions! ;) Distributed workloads can be done by some clever working with the save-files though but I have not tried it. ---- I don't know what it means about save-files, but I suggest looking into it. <div class="im"> Neal McBurnett <a href="http://neal.mcburnett.org/" target="_blank">http://neal.mcburnett.org/</a> </div><div><div></div><div class="h5">On Mon, Oct 05, 2009 at 08:30:35PM -0400, Ringo wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > I'm actually using pdfcrack, so I'm not technically breaking a hash. > Unfortunately, it only seems to do one thread at a time. I suppose I > could have one instance working on an x character password and one > instance working on an x+1 character password but that would require > some monitoring. > > It's the only pdf cracking utlility I've found but if people know of > others I'd be thrilled to try them. > > Ringo > > Ryan Maki wrote: > > Additionally, serious password cracking software might also be able to > > utilize your graphics card, depending on make and model.~Ryan > > > > On Mon, Oct 5, 2009 at 4:30 PM, Neal McBurnett <<a href="mailto:neal@bcn.boulder.co.us">neal@bcn.boulder.co.us</a>>wrote: > > > >> I'd be surprised if good cracking applications didn't already have an > >> option to do multi-threading to use all your cores. What software are > >> you using? > >> > >> -Neal > >> > >> On Sat, Oct 03, 2009 at 06:51:37PM -0400, Ringo wrote: > > Thanks for all of the great responses! Looks like for now I'll be > > sticking to just one core for cracking. Recovering this password > > unfortunately isn't enough of a justification for me to go in and hack > > the source. > > > > Ringo > > > > NICK VERBECK wrote: > >>>>> If you wrote the program yourself or have access to the source. You > >>>>> could extend it to use Threads. However with threads you can truly > >>>>> only fire-up as many threads as you have cores. Each thread will use a > >>>>> separate core to run in, but once you get 2 threads in the same core > >>>>> you will start context switching between each thread in that core > >>>>> slowing down the actual speed of those 2 threads. > >>>>> > >>>>> On Sat, Oct 3, 2009 at 8:31 AM, Neal McBurnett <<a href="mailto:neal@bcn.boulder.co.us">neal@bcn.boulder.co.us</a>> > >>> wrote: > >>>>>> In general, the problem you identify is one of the most daunting > >>>>>> issues facing computer science. It is getting much harder to speed up > >>>>>> individual processors, so the way to give people more power is to give > >>>>>> them more cores. But we often can't find a suitable way to take > >>>>>> advantage of them to solve a given problem.... > >>>>>> > >>>>>> <a href="http://en.wikipedia.org/wiki/Parallel_computing" target="_blank">http://en.wikipedia.org/wiki/Parallel_computing</a> > >>>>>> > >>>>>> It all depends on exactly what you want to do. You are in luck > >>>>>> because recovering a password is easily done in parallel, as James > >>>>>> notes. But many other interesting tasks can't be easily parallelized. > >>>>>> > >>>>>> Neal McBurnett <a href="http://neal.mcburnett.org/" target="_blank">http://neal.mcburnett.org/</a> > >>>>>> > >>>>>> On Sat, Oct 03, 2009 at 07:35:00AM -0600, James Wyatt wrote: > >>>>>>> Assuming both instances can work on different hashes you could run > >>> your > >>>>>>> app twice and assign processor affinity to each process. > >>>>>>> > >>>>>>> <a href="http://www.linuxjournal.com/article/6799" target="_blank">http://www.linuxjournal.com/article/6799</a> > >>>>>>> > >>>>>>> > >>>>>>> You could do something with erlang if you wanted to do it with style, > >>>>>>> but that would certainly be overkill. > >>>>>>> > >>>>>>> Jim > >>>>>>> > >>>>>>> > >>>>>>> > >>>>>>> On Sat, Oct 3, 2009 at 1:31 AM, Ringo <<a href="mailto:2600denver@gmail.com">2600denver@gmail.com</a>> wrote: > >>>>>>> > >>>>> Hey Ubuntu experts, > >>>>> > >>>>> I've got an intel dual-core processor which Ubuntu (intrepid) runs > >>> great > >>>>> on. It will fully utilize both cores if I've got lots of programs > >>>>> running but each program is confined to only one core. > >>>>> > >>>>> I've looked around online to find out how to make a program use both > >>>>> cores, but I can't find any advice on this outside of the convoluted > >>>>> process of running a program inside a virtual machine. I'm trying to > >>>>> recover a password from a hash and one core is at 100% while the other > >>>>> is around 3% usage. > >>>>> > >>>>> Any ideas? > >>>>> > >>>>> Thanks, > >>>>> Ringo > >>>>> > >>> > - -- > Ubuntu-us-co mailing list > <a href="mailto:Ubuntu-us-co@lists.ubuntu.com">Ubuntu-us-co@lists.ubuntu.com</a> > Modify settings or unsubscribe at: > >> <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-co" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-co</a> > >> > >> -- > >> Ubuntu-us-co mailing list > >> <a href="mailto:Ubuntu-us-co@lists.ubuntu.com">Ubuntu-us-co@lists.ubuntu.com</a> > >> Modify settings or unsubscribe at: > >> <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-co" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-co</a> > >> > > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.9 (GNU/Linux) > > iEYEARECAAYFAkrKj5sACgkQETpif9i/srqEmACeJA9wsfFvjyOSKo+r2ovFAM97 > YEoAnj71drdqAAqGkwaanyMhfiQppvmv > =YtVt > -----END PGP SIGNATURE----- > > -- > Ubuntu-us-co mailing list > <a href="mailto:Ubuntu-us-co@lists.ubuntu.com">Ubuntu-us-co@lists.ubuntu.com</a> > Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-co" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-co</a> </div></div>-- <div><div></div><div class="h5">Ubuntu-us-co mailing list <a href="mailto:Ubuntu-us-co@lists.ubuntu.com">Ubuntu-us-co@lists.ubuntu.com</a> Modify settings or unsubscribe at: <a href="https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-co" target="_blank">https://lists.ubuntu.com/mailman/listinfo/ubuntu-us-co</a> </div></div></blockquote></div>