Hackers broke into the IRS's systems and stole the personal info of more than 100,000 people, the agency announced recently. 

Since February, hackers had been forcing their way through an agency website to see old tax returns, then using info from those documents to file fraudulent returns.

"No entity can keep our information safe," says Nicole Perlroth, cybersecurity reporter for the New York Times. "Not the government, not our health insurers, not our lawyers."

Perlroth advises that people seriously consider freezing their credit. While it wouldn't have stopped the hackers from filing fraudulent tax returns, it would prevent thieves who have your personal information from opening new accounts in name.

Hear more of her advice by clicking the player up top.