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

2004-01-04 Thread James A. Donald
-- Alan Brown wrote: I just hope you're right about the CPUs burning up - it doesn't happen when machines are running OGR calculations, so I suspect that you just ran into a particularly badly built example. Eric S. Johansson no, it was a stock Intel motherboard, CPU, CPU fan in a

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

2004-01-04 Thread Alan Brown
On Tue, 30 Dec 2003, Bill Stewart wrote: The reason it's partly a cryptographic problem is forgeries. Once everybody starts whitelisting, spammers are going to start forging headers to pretend to come from big mailing lists and popular machines and authors, so now you'll not only need to

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

2004-01-04 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

2004-01-04 Thread Eric S. Johansson
Richard Clayton wrote: -BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On Tue, 30 Dec 2003, Eric S. Johansson wrote: But using your spam size, , the slowdown factor becomes roughly 73 times. So they would need 73 machines running full tilt all the time to regain their old throughput. Believe

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

2004-01-04 Thread Alan Brown
On Thu, 1 Jan 2004, Eric S. Johansson wrote: the easynet.nl list (recently demised) listed nearly 700K machines that had been detected (allegedly) sending spam... so since their detection was not universal it would certainly be more than 700K :( that is a nasty bit of news. I'll run some

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

2004-01-04 Thread Eric S. Johansson
Alan Brown wrote: They are currently tracking around 1.5 million compromised machines. *ouch*. on 24x7 both power and connectivity? The Swen and blaster worms install various spamware and backdoors. These have been estimated to have infected millions of machines worldwide and later versions

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

2004-01-04 Thread Seth David Schoen
Eric S. Johansson writes: 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

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

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

2003-12-30 Thread Alan Brown
On Tue, 30 Dec 2003, Eric S. Johansson wrote: But using your spam size, , the slowdown factor becomes roughly 73 times. So they would need 73 machines running full tilt all the time to regain their old throughput. Believe me, the professionals have enough 0wned machines that this is

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

2003-12-30 Thread Richard Clayton
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On Tue, 30 Dec 2003, Eric S. Johansson wrote: But using your spam size, , the slowdown factor becomes roughly 73 times. So they would need 73 machines running full tilt all the time to regain their old throughput. Believe me, the professionals

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

2003-12-30 Thread R. A. Hettinga
At 7:46 PM + 12/30/03, Richard Clayton wrote: where does our esteemed moderator get _his_ stamps from ? A whitelist for my friends, etc... Whitelist [EMAIL PROTECTED] Cheers, RAH -- - R. A. Hettinga mailto: [EMAIL PROTECTED] The Internet Bearer Underwriting Corporation

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

2003-12-30 Thread Tim May
(I have removed the various other mailing lists. People, please stop cross-posting to all of Hettinga's lists, plus Perrypunks, plus this CAM-RAM list.) On Dec 30, 2003, at 7:11 PM, Bill Stewart wrote: At 07:46 PM 12/30/2003 +, Richard Clayton [EMAIL PROTECTED] wrote: [what about mailing

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

2003-12-29 Thread Scott Nelson
At 01:43 PM 12/29/03 -0500, Eric S. Johansson wrote: 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