Not CUI Compliant
5 NIST 800-171 gaps detected. NOT authorized for CUI or DoD information per DoD memorandum. No FedRAMP authorization, no data retention, no audit logging. The Signal-gate scandal highlighted the risks.
Signal
by Signal Foundation
FedRAMP Status
Not FedRAMP Authorized
Impact Level
N/A
Category
Secure Messaging
Overview
Signal provides strong end-to-end encryption but is NOT authorized for DoD or CUI communications. It lacks FedRAMP authorization, data retention controls, admin audit capabilities, and centralized management. The 2025 "Signal-gate" scandal highlighted the dangers of using consumer messaging for defense communications.
CUI Risk Assessment
NOT authorized for CUI or DoD information per DoD memorandum. No FedRAMP authorization, no data retention, no audit logging. The Signal-gate scandal highlighted the risks.
NIST 800-171 Violations
Using Signal for CUI without FedRAMP authorization may violate these NIST 800-171 controls:
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FedRAMP Compliant Alternatives
Frequently Asked Questions
Is Signal approved for DoD communications?
No. DoD memoranda explicitly list Signal as not authorized for non-public DoD information. Despite strong encryption, it lacks FedRAMP authorization, audit trails, and data retention required for compliance.
But Signal has end-to-end encryption — is that not sufficient?
Encryption alone is not sufficient. NIST 800-171 requires audit logging (3.3.x), data retention (3.8.x), and centralized access control (3.1.x). Signal has none of these. Use AWS Wickr for authorized encrypted messaging.
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