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RE: RSA blind signatures

From: Anthony Nadalin <tonynad@microsoft.com>
Date: Tue, 27 Nov 2012 18:55:28 +0000
To: "Acar, Tolga" <tolga.acar@intel.com>, Mike Jones <Michael.Jones@microsoft.com>, Stefan Xenon <stefanxe@gmx.net>, "public-webcrypto-comments@w3.org" <public-webcrypto-comments@w3.org>, "sleevi@google.com" <sleevi@google.com>
Message-ID: <104ef361941f4eb386b399572f0a91ad@BY2PR03MB041.namprd03.prod.outlook.com>
Just not sure I follow the logic from this thread, we are propose other function that is needed for various crypto functions, why not the bigint? When it comes to blind signatures there are several ways to do that, we have the requirement to be able to use blind signatures (not Chaum's RSA) within the browser, we also need bigint. So we are in favor of this proposal.

From: Acar, Tolga [mailto:tolga.acar@intel.com]
Sent: Monday, November 26, 2012 4:45 PM
To: Mike Jones; Stefan Xenon; public-webcrypto-comments@w3.org; sleevi@google.com
Subject: RE: RSA blind signatures

Although I, too, would like to work on and use a bigint API in js, I am much less inclined to augment the web crypto API with a general purpose bigint API that looks more like math (group operations in particular) than crypto library. If there is interest in a bigint API in js, and it looks like there is, that should come under separate cover instead of being mixed with the Web Crypto API. So, what does that "separate cover" mean? A new WG, a natural extension of this WG?


-          Tolga

From: Mike Jones [mailto:Michael.Jones@microsoft.com]
Sent: Friday, November 23, 2012 10:57 PM
To: Stefan Xenon; public-webcrypto-comments@w3.org<mailto:public-webcrypto-comments@w3.org>; sleevi@google.com<mailto:sleevi@google.com>
Subject: RE: RSA blind signatures

For what it's worth, I know of other groups interested in native speed bigint math in JavaScript.

-- Mike
________________________________
From: Stefan Xenon
Sent: 11/23/2012 8:15 AM
To: public-webcrypto-comments@w3.org<mailto:public-webcrypto-comments@w3.org>; sleevi@google.com<mailto:sleevi@google.com>
Subject: Re: RSA blind signatures
Hi Ryan,
by any chance, could we propose such bigint API? If this would have a
realistic chance, how is the process to move forward?

Regards
Stefan

Am 23.11.2012 18:43, schrieb Ryan Sleevi:
> A bigint API has not been proposed.
>
> On Nov 23, 2012 1:47 AM, "Stefan Xenon" <stefanxe@gmx.net
<mailto:stefanxe@gmx.net%0b>> <mailto:stefanxe@gmx.net>> wrote:
>
>     Hi!
>     We are developing a system (www.opencoin.org<http://www.opencoin.org>
>     <http://www.opencoin.org>) which uses Chaum's RSA
>     blind signatures. Of course I don't expect the Web Crypto API to
>     natively support blind signatures. Instead we would like to utilize
>     "raw" big integer operations to speed up our calculations. But In your
>     current draft I couldn't find such basic operations exposed to web
>     applications. Primarily we would need big integer operations for
>     exponentiation and inverting (both modulo). Did I overlook such
>     functions? Or would it be possible for your API to expose such functions
>     to web applications?
>
>     Regards,
>     Stefan
>
>
Received on Tuesday, 27 November 2012 18:56:48 GMT

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