It's your birthday. And thanks to your Facebook profile, everybody knows that. Your wall fills up with well wishes from hundreds of "friends." Sure, it's nice to be noticed. But security experts are skeptical about whether sharing information, such as birthdays, with a broad audience is a bright idea. "It's all about providing the bad guy with intelligence," said Robert Siciliano, CEO of IDtheftsecurity.com.
Many people use their birthdate in passwords and personal identification numbers, and security questions often ask for it to resend a lost password. So broadcasting a birthdate could help cybercriminals pose as others as they log on to various Web sites, experts warned.