Hello Andrew, Wednesday, June 11, 2008, 11:48:55 AM, you wrote:
> ... and it also means that OCR based spam filtering is succesful enough > for the spammers to adopt CAPTCHA-style text-obfuscation-in-images as an > evasion method. Possibly, but I wouldn't put too fine a point on it. It's very easy for spammers to adopt this new technique--- it may have happened just on a whim. They often try things at random just because they think it might work, or because they get an idea and start tinkering with it. In that context this is a kind of "random mutation" that may result in a kind of spam "more fit" for survival. Or it might not. Another reason for them to try this is that their current methods for "modulating" their images are getting old - and the artifacts associated with those methods are themselves fairly easy to detect-- so rather than invent a new way a quick easy choice is to coopt CAPTCHA and let somebody else do the work. _M -- Pete McNeil Chief Scientist, Arm Research Labs, LLC. ############################################################# This message is sent to you because you are subscribed to the mailing list <sniffer@sortmonster.com>. To unsubscribe, E-mail to: <[EMAIL PROTECTED]> To switch to the DIGEST mode, E-mail to <[EMAIL PROTECTED]> To switch to the INDEX mode, E-mail to <[EMAIL PROTECTED]> Send administrative queries to <[EMAIL PROTECTED]>
