Ben Hyde wrote: > > On Sunday, November 9, 2003, at 12:08 PM, Ben Laurie wrote: > >> Brian Behlendorf wrote: >> >>> On Fri, 7 Nov 2003, Santiago Gala wrote: >>> >>>> Classified for reading until I finish a proposal ;-) >>>> >>>> A nice scheme against spam, I read about some time ago, was about >>>> requiring the email sender to compute a computationally difficult >>>> challenge before the email was accepted, for uknown/untrusted senders, >>>> something that could take 1 sec CPU time for a reasonable processor. >>>> The idea was raising the cost of sending spam and putting it where it >>>> belongs. Trusted senders, like the ASF, for instance, would not be >>>> required to do it. >>>> >>>> So, a spammer would have to pay like 1 TeraInstruction per message, and >>>> a reasonable PC would send no more than say 3000 spams per hour. This, >>>> BTW, would make desirable to send signed messages for bulk senders, >>>> since those would be much "cheaper" to send. >>> >>> >>> >>> Ouch. Daedalus.apache.org sends out over 1M messages per day, and at >>> bursty times 100 per second. How do we convince a non-trivial number of >>> hosts to trust us and not require that computation? >> >> >> You require hash-cash for list postings and sign them for redistribution. > > > Such a signature would, i hope, assert little.
It would assert that the mailing list saw hashcash it considered adequate. -- http://www.apache-ssl.org/ben.html http://www.thebunker.net/ "There is no limit to what a man can do or how far he can go if he doesn't mind who gets the credit." - Robert Woodruff --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
