The breach at one of the networks of the Defense Information Systems Agency (DISA), which secures communications for President Trump and military intelligence and other government officials, affected as many as 200,000 people, exposing their personal information, including Social Security numbers.

In a Feb. 11 letter to potential victims, DISA offered few details of the breach that occurred between May and July 2019, according to a Reuters report, though a DISA spokesperson cited said they were given “information about actions that can be taken to mitigate possible negative impacts.”

Noting that the agency took “the potential compromise very seriously,” DISA Chief Risk Officer and CIO Roger Greenwell wrote that DISA had “put additional security measures in place to prevent future incidents” and is “adopting new protocols to increase protection of all PII.”

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