The DOD is not using "flagrantly using Signal." The Secretary of Defense, whatever his preferred pronouns are, is breaking the law.
CISA recommended Signal for encrypted end-to-end communications for "highly targeted individuals."
https://www.cisa.gov/sites/default/files/2024-12/guidance-mo...
CISA recommended Signal for encrypted end-to-end communications for "highly targeted individuals."
https://www.cisa.gov/sites/default/files/2024-12/guidance-mo...