nanog mailing list archives
Re: the O(N^2) problem
From: "Suresh Ramasubramanian" <ops.lists () gmail com>
Date: Mon, 14 Apr 2008 12:39:22 +0530
On Mon, Apr 14, 2008 at 11:50 AM, Steven M. Bellovin <smb () cs columbia edu> wrote:
The risk in a reputation system is collusion.
Multiple reputation systems, each with their own reputation .. Sed quis custodiet ipsos custodes and all that .. A lot of the "reputation" (aka "positive reputation") shall we say work is heavily sender / ESP / bulk mailer etc driven. And the negative reputation stuff (blocklists like spamhaus etc) have been around rather a long time. So quite a few ISPs tend to rely on trusted negative reputation systems (aka they'd use spamhaus) and build positive reputation (whitelists) on their own, possibly tying this to auth systems such as dkim. --srs -- Suresh Ramasubramanian (ops.lists () gmail com)
Current thread:
- the O(N^2) problem Edward B. DREGER (Apr 13)
- Re: the O(N^2) problem David Andersen (Apr 13)
- Re: the O(N^2) problem Owen DeLong (Apr 13)
- Re: the O(N^2) problem Suresh Ramasubramanian (Apr 13)
- Re: the O(N^2) problem Edward B. DREGER (Apr 13)
- Re: the O(N^2) problem Suresh Ramasubramanian (Apr 13)
- Re: the O(N^2) problem Steven M. Bellovin (Apr 13)
- Re: the O(N^2) problem Suresh Ramasubramanian (Apr 14)
- Re: the O(N^2) problem Joe Greco (Apr 14)
- Re: the O(N^2) problem Suresh Ramasubramanian (Apr 13)
- [admin] RE: the O(N^2) problem Martin Hannigan (Apr 14)
- <Possible follow-ups>
- Re: the O(N^2) problem Edward B. DREGER (Apr 14)
- Re: the O(N^2) problem Rich Kulawiec (Apr 14)