Wanted: New Antispam Tactics

The spread of CAPTCHA-breaking tools has resulted in a sudden surge in the use of blogging sites such as Google’s Blogspot to host spam adverts, security vendor MessageLabs has reported.The company’s latest Intelligence report for October notes the increasing level of spam pollution to be found both on the free sites such as Blogspot and Mobileme, designed to exploit the high levels of trust afforded to content on branded sites.The underlying mechanism is the ongoing collapse of traditional defence systems such as CAPTCHA (Completely Automated Public Turing tests to tell Computers and Humans Apart), a variety of which have been broken over recent months.

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