bluesky AT lists.ibiblio.org
Subject: Global-Scale Distributed Storage Systems
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- From: Adam Back <adam AT cypherspace.org>
- To: Global-Scale Distributed Storage Systems <bluesky AT franklin.oit.unc.edu>
- Subject: Re: Think cash
- Date: Fri, 9 Mar 2001 04:28:47 -0400
A friend of mine had a go at building such a puzzle to
deter automated downloads of activation codes. He built a
prototype.
It was just a pattern matching problem. It would take a
set of numbers draw them in a pixel array and munge it
around a bit, scatter random pixels over it. Humans can
easily read off the number. It would take a bit of effort
to build OCR software that can read through that noise.
But I'm pretty sure it could be done if somone were
motivated.
You see a similar thing where people render their email
addresses as a GIF to hide it from spiders.
Adam
On Fri, Mar 09, 2001 at 02:17:47AM -0600, Tony Kimball wrote:
>
> It seems not so hard to me.
>
> For example, abstractly, the computer can make a picture, and ask a
> question about it which requires significant understanding,
> and parse the reply trivially.
-
Think cash,
Ian Clarke, 03/09/2001
- <Possible follow-up(s)>
- Re: Think cash, Michael J Freedman, 03/09/2001
- Re: Think cash, Oskar Sandberg, 03/09/2001
- Think cash, Tony Kimball, 03/09/2001
- Re: Think cash, Ian Clarke, 03/09/2001
- Re: Think cash, Adam Back, 03/09/2001
- Re: Think cash, graydon, 03/09/2001
- Re: Think cash, dmolnar, 03/09/2001
- Re: Think cash, Justin Chapweske, 03/09/2001
- Re: Think cash, Peter Todd, 03/09/2001
- Re: Think cash, Ian Clarke, 03/09/2001
- Re: Think cash, Peter Todd, 03/09/2001
- Re: Think cash, Oskar Sandberg, 03/10/2001
- Re: Think cash, Peter Todd, 03/10/2001
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