The state attorney general has launched an investigation into the Equifax breach, but many people are left worrying if their credit and identities are at risk.

Equifax is an Atlanta-based company that is one of the three major consumer credit reporting agencies in the country. The massive data breach may have affected 143 million customers.

Many possible victims are now feeling helpless. Eddie Davis is an assistant professor at SUNY Farmingdale and a cybersecurity expert. He says the Equifax breach presents a significant danger to those affected because it included Social Security numbers, but he says there are some things you can do.

“You might want to have some sort of credit monitoring in place,” says Davis. “That way any inquiry on your credit comes back to you via email, to make sure you know something is going on.”

If something is going on, he says you should immediately contact the major credit bureaus and perhaps ultimately freeze your credit.

Equifax has set up a website for people to check if their information may have been compromised. A hotline has also been set up.