The hackers who broke into the computer systems of the United States Postal Service and stole personal information of more than 800,000 employees and retirees may work for the Chinese government, according to The Washington Post.
Information potentially compromised in the incident may include personally identifiable information about all USPS employees, including names, birth dates, Social Security numbers, addresses and emergency contact information, a USPS statement notes.
The intrusion also compromised call center data for nearly 3 million USPS customers who called or emailed the Postal Service Customer Care Center between January and mid-August, CNN reported. This exposed names, addresses, telephone numbers, email addresses and other information.
No customer credit card information used at post offices or on usps.com was compromised, according to the Postal Service.
The FBI — which is leading the investigation into the breach — issued a statement Monday: "The FBI is working with the United States Postal Service to determine the nature and scope of this incident. Impacted individuals should take steps to monitor and safeguard their personally identifiable information, and report any suspected instances of identity theft to the FBI's Internet Crime Complaint Center at www.ic3.gov."
And although the USPS is providing its employees with one year of free credit monitoring, that may not be enough to protect them if their identities end up being stolen, according to LifeLock blog editor Cory Warren.