Re: Shamir's Secret Sharing Scheme integration?
Hi Richard, I don't know any integration in GnuPG but instead the following open source implementatio may worth a try: http://point-at-infinity.org// Regards Stefan Am 21.02.2010 14:40, schrieb Richard Geddes: Hello, Is there a utility that integrates gnupg with (Shamir's Secret Sharing Scheme)? And maybe using smartcards? If not has anyone seen a HowTo that shows how to integrate them? Richard ___ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users ___ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
Re: Shamir's Secret Sharing Scheme integration?
* Stefan Xenon: I don't know any integration in GnuPG but instead the following open source implementatio may worth a try: http://point-at-infinity.org// IIRC, this particular software does not implement Shamir's scheme. -- Florian Weimerfwei...@bfk.de BFK edv-consulting GmbH http://www.bfk.de/ Kriegsstraße 100 tel: +49-721-96201-1 D-76133 Karlsruhe fax: +49-721-96201-99 ___ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
Re: Shamir's Secret Sharing Scheme integration?
On Sun, 21 Feb 2010 14:40, rich.ged...@verizon.net said: Is there a utility that integrates gnupg with (Shamir's Secret Sharing Scheme)? And maybe using smartcards? If not has anyone seen a HowTo that shows how to integrate them? I don't know of a complete solution but Phil Sutter wrote his master thesis on this. See http://lists.gnupg.org/pipermail/gnupg-devel/2008-July/024506.html The code is at: http://nwl.cc/cgi-bin/git/gitweb.cgi?p=ssd.git;a=summary Salam-Shalom, Werner -- Die Gedanken sind frei. Ausnahmen regelt ein Bundesgesetz. ___ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
Re: Shamir's Secret Sharing Scheme integration?
On Sun, 21 Feb 2010, Richard Geddes wrote: Hello, Is there a utility that integrates gnupg with (Shamir's Secret Sharing Scheme)? And maybe using smartcards? If not has anyone seen a HowTo that shows how to integrate them? Ikinda do. I encoded my will with it before some surgery a few years ago, and documented it in the process, along with some other notes on short circuiting the whole thing. Have a look at www.gushi.org/willworks.txt -Dan -- Dan Mahoney Techie, Sysadmin, WebGeek Gushi on efnet/undernet IRC ICQ: 13735144 AIM: LarpGM Site: http://www.gushi.org --- ___ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
Re: Shamir's Secret Sharing Scheme integration?
Thanks for all the input... good stuff. I can think of a bash script that - generates the passphrase (using /dev/urandom) for a gnupg private key, - pipe the random passphrase into to generate the shares, threshold (s,t), - and every time the passphrase is needed, combine t shares to recreate the original random passphrase. A problem I see with this approach is that an attacker can easily modify the script to output the shares... breaking confidentiality. Even binary code can be reverse-compiled and re-engineered to spill the secrets. Does anyone know of techniques to protect code from being reverse engineered with standard off the shelf techniques...? Thanks Richard Geddes wrote: Hello, Is there a utility that integrates gnupg with (Shamir's Secret Sharing Scheme)? And maybe using smartcards? If not has anyone seen a HowTo that shows how to integrate them? Richard ___ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users ___ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
Re: Shamir's Secret Sharing Scheme integration?
* Roscoe: On Mon, Feb 22, 2010 at 7:32 PM, Florian Weimer fwei...@bfk.de wrote: * Stefan Xenon: I don't know any integration in GnuPG but instead the following open source implementatio may worth a try: http://point-at-infinity.org// IIRC, this particular software does not implement Shamir's scheme. And what makes you think that? The existence of the -D option. -- Florian Weimerfwei...@bfk.de BFK edv-consulting GmbH http://www.bfk.de/ Kriegsstraße 100 tel: +49-721-96201-1 D-76133 Karlsruhe fax: +49-721-96201-99 ___ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
