Ben, Has hash-cash got any further since last time we talked about it? I always thought it was a cool idea...
david ----- Original Message ----- From: "Ben Laurie" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Sunday, November 09, 2003 5:08 PM Subject: Re: bogus subs to mailing lists (more?) > 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] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
