MEMPHIS, Tenn. -- Your online information could be compromised in the latest round of hacking incidents where more than one billion people may have been targeted.
A security company blamed Russian hackers for the data breech.
Hold Security, the company that found out more than 400,000 websites worldwide were hacked, posted the information on their website.
The company said the cyber-thieves stole more than one billion usernames and passwords. Hundreds of e-mail addressees were also stolen.
Victims or websites affected have not been identified.
A computer science professor at the University of Memphis said there are steps you can take to protect your information.
"It is an ongoing, continuous process so it is always a good idea to change the password, change the positive authentication information," Dr. Dipankar Dasgupta said.
Dasgupta also said beware of other scammers attempting to cash in on your worries.
A lot of people will send out e-mails posing as banks or the IRS to cash in on your worries.
Experts said many of those messages may look legit, but be 100 percent sure it's not a scam before giving out information or clicking links.