The Department of Homeland Security suffered over 100 "spills" of classified information last year, 40 percent of which came from one office, according to a leaked internal document I obtained. Officials and lawmakers told me that until the Department imposes stricter policies and sounder practices to better protect sensitive intelligence, the vulnerabilities there could be exploited. Not only does this raise the threat that hostile actors could get their hands on classified information, but may lead to other U.S. agencies keeping DHS out of the loop on major security issues.
A spill is not the same as an unauthorized disclosure of classified information. A Homeland Security official explained that spills often include “the accidental, inadvertent, or intentional introduction of classified information into an unclassified information technology system, or higher-level classified information into a lower-level classified information technology system, to include non-government systems.”
Examples include: using a copier not approved for the level of classified information copied; failing to properly mark a classified product; transmitting classified information on an unclassified system like Gmail; or sending classified information to someone who, while having the proper level of clearance, is not authorized to read a section of information sent to them, the official said.