Google is alerting employees that some of their personal data has been exposed.
The Mountain View advertising house sent letters (PDF) to some of its workers stating that someone with its employee benefits provider mistakenly sent a file to a colleague containing the names and social security numbers of Google employees.
"We regret that this incident occurred, and are working with the vendor to help ensure that this type of issue does not happen again," Google said.
The document was deleted by the recipient and Google says there have been no reports of fraudulent activity. Still, Google says that it will be giving all of the exposed staffers two years of free identity and credit monitoring service. ®