NEW YORK - Monster Worldwide Inc., a major online job-search site, said Wednesday it was beefing up its security measures following a significant data breach this month.

Earlier this month data security company Symantec Corp. uncovered a scheme where con artists obtained user names and passwords of legitimate recruiters who use Monster to search for job candidates, and then gleaned personal information from job seekers that they then used to craft personalized "phishing" e-mails.

Monster said it believes the fake e-mails were sent to Monster users to lure them into divulging financial information.