Not CUI Compliant
6 NIST 800-171 gaps detected. Not end-to-end encrypted by default. Foreign-owned. Explicitly prohibited by most agency policies. Cannot be used for any defense communications.
Telegram
by Telegram FZ-LLC
FedRAMP Status
Not FedRAMP Authorized
Impact Level
N/A
Category
Secure Messaging
Overview
Telegram is a messaging platform that is not end-to-end encrypted by default (only "secret chats" use E2E encryption). It is foreign-owned (UAE-based) and explicitly prohibited by most government agency policies for official business. It has no FedRAMP authorization, no audit controls, and no data residency guarantees.
CUI Risk Assessment
Not end-to-end encrypted by default. Foreign-owned. Explicitly prohibited by most agency policies. Cannot be used for any defense communications.
Deployment & Architecture
Deployment Model: Cloud SaaS (vendor-hosted)
Telegram has no FedRAMP authorization on record. DFARS 252.204-7012(b)(2)(ii)(D) requires an external cloud service provider to meet security requirements equivalent to the FedRAMP Moderate baseline — an authorization is the straightforward way to show that, but it is not the only one. Without one, the burden is on you to establish, document, and defend equivalency, and to meet the clause's incident-reporting and media-preservation obligations. Most contractors find an authorized alternative cheaper than carrying that burden.
Migration Checklist
- 1ISSO must immediately conduct organization-wide scan to identify all Telegram installations and active user accounts across all CUI systems and networks.
- 2Legal counsel should review all existing communications for potential CUI exposure and coordinate with contracts officer to assess customer notification requirements under DFARS 252.204-7012.
- 3System administrator must implement network-level blocking of Telegram domains (web.telegram.org, telegram.org) through enterprise firewall and web content filtering systems.
- 4ISSO shall update System Security Plan Section 1.2 to explicitly prohibit Telegram usage and reference this restriction in AC-20 control implementation.
- 5Contracts officer must notify all DoD customers within 72 hours of discovery if any CUI may have been processed through Telegram platforms per DFARS 252.204-7012 incident reporting requirements.
- 6ISSO must create high-priority POA&M entries addressing AC-20 (Use of External Systems) control deficiencies and establish 30-day remediation timeline.
- 7System administrator should deploy approved messaging alternative (Microsoft Teams GCC High or Signal for Government) with appropriate FedRAMP boundary integration.
- 8Training officer must conduct mandatory security awareness sessions emphasizing shadow IT detection and approved communication tools within 14 days.
- 9ISSO shall update authorization boundary diagram to reflect removal of Telegram and addition of approved messaging solution with appropriate data flow documentation.
- 10Compliance officer must schedule follow-up assessment in 90 days to verify sustained elimination of Telegram usage and effectiveness of compensating controls per NIST 800-171 CA-7 requirements.
NIST 800-171 Violations
Using Telegram for CUI without FedRAMP authorization may violate these NIST 800-171 controls:
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Frequently Asked Questions
Is Telegram secure enough for defense communications?
No. Telegram is not end-to-end encrypted by default, is foreign-owned, and has no FedRAMP authorization. It is explicitly prohibited for government use by most agency policies.
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