Re: [camram-spam] Re: Microsoft publicly announces Penny Black PoW postage project

2004-01-02 Thread Eric S. Johansson
Ben Laurie wrote: Richard Clayton wrote: and in these schemes, where does our esteemed moderator get _his_ stamps from ? remember that not all bulk email is spam by any means... or do we end up with whitelists all over the place and the focus of attacks moves to the ingress to the mailing lists

Re: [camram-spam] Re: Microsoft publicly announces Penny Black PoW postage project

2003-12-30 Thread Eric S. Johansson
Scott Nelson wrote: d*b --- s where: d = stamp delay in seconds s = spam size in bytes b = bandwidth in bytes per second I don't understand this equation at all. It's the rate limiting factor that counts, not a combination of stamp speed + bandwidth. well, stamp speed is method of r

Re: [camram-spam] Re: Microsoft publicly announces Penny Black PoW postage project

2003-12-29 Thread Eric S. Johansson
Bill Stewart wrote: At 09:37 PM 12/26/2003 -0500, Adam Back wrote: The 2nd memory [3] bound paper (by Dwork, Goldber and Naor) finds a flaw in in the first memory-bound function paper (by Adabi, Burrows, Manasse, and Wobber) which admits a time-space trade-off, proposes an improved memory-bound f