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. Cheers, Ben. -- 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]
