Livingsocial Under Attack By Hackers, Customers Personal Data Stolen

Popular daily deals site urges over 50 million users to change passwords following cyber attack.
2:00 | 04/28/13

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Transcript for Livingsocial Under Attack By Hackers, Customers Personal Data Stolen
Now, to the major consumer alert tonight involving 50 million customers who shop online. The discount website livingsocial, is telling its users to change its passwords and is apologizing after that site was hacked. With so many passwords, so many of us try to keep them simple so we remember them. As linzie janis tells us, that's exactly what the hackers want. Reporter: It's the site where deal-hunters go for discounts on everything from rounds of golf to spa treatments. But this weekend, more than 50 million members of livingsocial are learning they have been hacked. Their names, e-mail addresses, birthdays, and encrypted versions of their passwords may have been compromised. John tests online security for businesses by seeing how easy it is for him to hack in. It's a very attractive target. Now that they have all of these PASSWORDS AND I.D.s, THEY CAN Try and use them on all the other sites where they are really valuable. Reporter: That's why livingsocial is requiring users to change their passwords. And if they use the same one on another site, like online banking, it says better change that, too. It's so important to use different passwords on each site that you log into. That way if one of them is compromised, you aren't compromised across the entire internet. Reporter: We can also help ourselves by making our passwords more difficult for hackers to decode. Going from six characters to seven characters could mean the difference between going from days to years to crack them. Especially if you throw in some special characters, like an asterisk or a period. Reporter: Now, another thing we shouldn't do is write down all of our passwords on a piece of paper. John suggests buying an electronevice that will store your passwords. David, all you need to do is remember one difficult, master password to get into that device. We all forget our passwords. Know why. Add one character can make a big

This transcript has been automatically generated and may not be 100% accurate.

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