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There was a paper somewhere proposing a scheme for filtering email spam with the use of Bitcoin micropayments. I can't remember where I saw it and can't find it now. Anybody knows about it?

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2 Answers 2

Hashcash is one of the many anti-spam techniques used today, which is essentially a proof-of-work system designed to limit not only email spam but also denial-of-service attacks. A similar proof-of-work methodology is being used in bitcoin for block generation.

With an average of 150 billion e-mails sent out on a daily basis I cannot see how this could be deployed in the blockchain, which would then have to be adjusted to facilitate 1,7 million TPS while now it only serves 7 TPS (artificial limit).

Also, bitcoin is not really made for such small payments which would result in tons of useless and unspendable dust outputs.

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I know about hascash and am aware of the scalability problems with Bitcoin being used for this. I'm only interested in the paper from a pure academical standpoint. –  knapo Aug 29 at 20:19

Could bitcoins be used to filter spam?

Defeating email spam with Bitcoin

https://bitcointalk.org/index.php?topic=60272.0

https://bitcointalk.org/index.php?topic=75933.0

Search buttons are there for a reason

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Giving general UTFG-like advices without even reading the question, are we? I was looking for a paper on this matter; I have read the threads and did not find it there. Oh yeah, and referencing this very question, that's really gonna help :-) –  knapo Aug 30 at 10:10
    
haha nice catch on the loopy url. ;) –  angelitto Aug 30 at 11:01

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