[hashcash] updating Digest::Hashcash? (Re: Re: Digest::Hashcash)

  • From: Adam Back <adam@xxxxxxxxxxxxxxx>
  • To: hashcash@xxxxxxxxxxxxx
  • Date: Fri, 3 Jun 2005 07:48:38 -0400

Yes I think it was a minor bug fix / optimization or something like

It probably wouldn't be too hard to update Digest::Hashcash to support
the version 1 tokens (as well as version 0), it's mostly formatting
stuff, plus very simple definition change to avoid spammers
benefitting from luck (token-value is min of token value claimed in
stamp, and of the hash size... that way if you create a 20 bit token
it will not have value over 20 bits even if you get lucky and get a 24
bit token (happens 1/16th of time)).

If someone wants a nice self-contained mini-coding project... 

I think you would not have to understand the perl XS C/perl
integration stuff in any depth as the API probably wouldn't need to
change much other than maybe passing a few more args.


On Sun, May 08, 2005 at 10:16:36PM +0100, Steve Crook wrote:
> On Thu, May 05, 2005 at 10:59:23PM +0100, Jonathan Morton wrote:
> > I think I know what's happening.  The script is assuming (without 
> > checking) that the token is "version 0" format, which had only four 
> > fields:  version:timestamp:resource:junk
> Thanks for the reply Jonathan, I think you hit the nail on the head.
> I'd assumed it was version 1 seeing that Digest::Perl was only released
> in Mar'05.
> Oh well, back to the drawing board.  :(

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