Risks of LinkedIn: Spear Phishing and Data Exposure Concerns

If you use LinkedIn, you've probably told the site where you work, what you do and who you work with. That's a gold mine for hackers, who are increasingly savvy in using that kind of public -- but personal -- information for pinpoint attacks. It's called "spear phishing," and it paid off last year in two especially high-profile security breaches: a Gmail attack that ensnared several top U.S. government officials and a separate attack on RSA, whose SecurID authentication tokens are used by millions.

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