Now is a good time to change your computer passwords.
Russian hackers have stolen more than a billion user names and passwords in a series of internet heists affecting 420,000 websites.
Thatâ??s according to a Milwaukee firm called Hold Security.
Hold Security investigators are not releasing the names of the hacked websites because of nondisclosure agreements.
Columbia computer technician Jacob Roehoke said the stolen passwords are a perfect example of the questionable security measures that both big and small companies use to protect peopleâ??s information online.
Roehoke said, â??Itâ??s commonly passed through emails. Sometimes attachments are the most common way that people will get hacked. If you received an email from a friend who was compromised, then you could also be compromised as well if you open something from them.â??
Hold Security investigators said the Russian hackers also have stolen 500 million email addresses that could help them commit other crimes.