Chaum's unpatented ecash scheme
Ben Laurie
ben at algroup.co.uk
Thu Aug 22 08:19:42 PDT 2002
Nomen Nescio wrote:
> Ben Laurie writes:
>
>
>>Note that the scheme as described (and corrected) is vulnerable to
>>marking by the bank, and so is not anonymous. This is discussed and
>>fixed in my paper on Lucre
>>(http://anoncvs.aldigital.co.uk/lucre/theory2.pdf).
>
>
> Actually the scheme described based on Chaum's talk (corrected for
> probable typos) is essentially what you describe in your paper as the
> Type II Defence, in section 5. Your analysis shows that it is not
> vulnerable to marking and is anonymous.
>
> Speaking of anonymous, you should give credit in your paper to Anonymous
> for discovering the possibility of marking Lucre coins, in a coderpunks
> posting at
> http://www.mail-archive.com/coderpunks@toad.com/msg02186.html, and for
> inventing the Type II Defence, both in the posting above and amplifed
> at http://www.mail-archive.com/coderpunks@toad.com/msg02323.html.
>
> It may seem pointless to credit anonymous postings, but it makes the
> historical record more clear.
I've updated the paper (the update also corrects a slight typo in one of
the equations).
Cheers,
Ben.
--
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Available for contract work.
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