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Websites may soon be asking you to watch a short ad rather than enter garbled text.
Researchers downloaded 3.5 million profiles to see how accounts are used to send out spam.
Approach could help software learn how to identify fake accounts with less honorable intentions.
They get results by exploiting a social network’s trusting environment.
Software creates images that confuse machines but are clear to people.
Illegitimate pharmacies account for 90 percent of drug ads on Microsoft’s Bing, according to a new report.