The incident affected 247,167 current and former federal employees that were employed by DHS in 2014.
The leaked database also reveals that the virtual keyboard application steals users' personal contact books, the names and phone numbers of their contacts, and has already stolen more than 373 million records.
The University of Stanford reported that it has left sensitive student and employees data exposed on three separate occasions over the last year.
Hundreds of guests interested in the Bulgarian business cybersecurity attended the Forum “Cybersecurity – information and (personal) data. Be aware!”