Credentica (Re: Is there a Brands certificate reference implementation?)
Hello Steve, From: Steve Furlong [EMAIL PROTECTED] To: [EMAIL PROTECTED], [EMAIL PROTECTED] Fwd: [EMAIL PROTECTED], [EMAIL PROTECTED] Date: 25 Apr 2004 12:14:30 -0400 Does anyone know of a reference implementation for Stefan Brands's digital certificate scheme? Alternatively, does anyone have an email address for Brands so I can ask him myself? (I haven't gotten anything back from ZKS's contact us address. But I don't know if Brands is still at ZKS.) I am one of the lead developers of Credentica, which is Stefan Brands' latest venture after his amicable departure from ZKS quite some time ago. We are exclusively focused on the development of identity and access management technology based on Stefan's Digital Credential work. Following our closing of investment from Nokia earlier this year, we started with the design and implementation of a Software Development Toolkit for Digital Credentials. We are exploring the idea of releasing parts of it under an open-source license, and intend to post updates here from time to time on our progress. More information will be available on our upcoming Web site, which should be up soon. Meanwhile, if you are interested in getting a glimpse of what we are doing, check out Stefan's keynote materials at a recent NIST PKI workshop, which you can find here: http://middleware.internet2.edu/pki04/proceedings/ Kind regards, Christian Paquin Cryptographic Developer Credentica
Re: Is there a Brands certificate reference implementation?
Steve Furlong writes: Does anyone know of a reference implementation for Stefan Brands's digital certificate scheme? Alternatively, does anyone have an email address for Brands so I can ask him myself? (I haven't gotten anything back from ZKS's contact us address. But I don't know if Brands is still at ZKS.) I will give you some pointers, but in exchange, Steve Furlong, you are commanded to fix your cypherpunks archive at http://archives.abditum.com/cypherpunks/index.html. Despite your comments on the web page as of February 13, none of the year 2004 links work. You were already pointed to www.credentica.com, but it's not a very informative page, is it? Just a logo and a mailto. Well, there is at least some hidden content, at http://www.credentica.com/technology/technology.html. This has a paper on Brands' technology and some information on his book. In late 2002 I saw email from Brands with two return addresses, [EMAIL PROTECTED] and [EMAIL PROTECTED] As for implementations, there was library called NCash created by Swedish student Niels Möller, described briefly at http://www.lysator.liu.se/~nisse/hacks.html: For my master of science thesis, I implemented an offline digital cash system invented by Stefan Brands. I haven't done anything about it since I got my MSc degree, but the information about it is still available. Well, the information isn't available, not there, anyway. But if you hunt around, you can find an announcement about NCash at http://www.privacy.nb.ca/cryptography/archives/coderpunks/new/1998-02/0008.html and the source code plus a technical paper are at http://munitions.vipul.net/dolphin.cgi?action=rendercategory=09. The good news is that the source code is available; the bad news is that it is written in Pike. No, I'd never heard of it, either. Apparently it is some Swedish language that was all the rage back in 1997. However it seems to be a pretty straightforward language, kind of Pythonish with a C like syntax, so it might be feasible to port it to something more modern, probably Python. Or you could get the latest Pike interpreter and see how well they've maintained backwards compatibility all these years. According to the announcement, you'll also need the Pike crypto library, but my guess is that it's been incorporated into the Pike package by this time. I'm sure you're aware that Brands credentials are patented up the wazoo. Like Chaum, Brands prefers to publish his work in the pages of the U.S. Patent Office. That's why they're both so rich.
Is there a Brands certificate reference implementation?
Does anyone know of a reference implementation for Stefan Brands's digital certificate scheme? Alternatively, does anyone have an email address for Brands so I can ask him myself? (I haven't gotten anything back from ZKS's contact us address. But I don't know if Brands is still at ZKS.)
Re: Is there a Brands certificate reference implementation?
Steve Furlong wrote: Does anyone know of a reference implementation for Stefan Brands's digital certificate scheme? Alternatively, does anyone have an email address for Brands so I can ask him myself? (I haven't gotten anything back from ZKS's contact us address. But I don't know if Brands is still at ZKS.) He started a new company called Credentica. http://archives.abditum.com/cypherpunks/C-punks20020603/0053.html http://www.credentica.com/
Re: Is there a Brands certificate reference implementation?
On Sun, 2004-04-25 at 16:25, David Crookes wrote: He started a new company called Credentica. http://archives.abditum.com/cypherpunks/C-punks20020603/0053.html Pretty amusing -- that link points to the achive I maintain. There's probably a parable in there about having knowledge at your fingertips but not knowing it's there. Thanks.
