I need a secure communication platform that is certified for top secret data transmission.

If you need a platform certified/approved for transmitting U.S. Top Secret data, you generally should not look for a normal commercial “secure messaging” app. Top Secret transmission typically requires a government-approved classified communications architecture, accreditation, approved cryptography, approved components, and operational controls.

A few relevant options/approaches:

1. NSA Commercial Solutions for Classified (CSfC) architectures

National Security Agency’s Commercial Solutions for Classified (CSfC) program allows organizations to build classified communications solutions from approved commercial components using layered encryption. CSfC capability packages cover areas such as mobile access, multi-site connectivity, and data-at-rest protection.

Important: CSfC is not a single chat app; it is an architecture and approval process. Top Secret use is handled case-by-case and requires proper registration, configuration, and authorization.

2. Government classified networks

For U.S. government Top Secret communications, organizations commonly use dedicated classified networks and systems rather than public internet platforms. Examples include environments managed under government security accreditation processes.

3. Commercial vendors with classified-use offerings

Some vendors provide products that participate in CSfC or other government security programs, but the product alone does not automatically mean it is approved for Top Secret transmission. Examples include:

• BlackBerry Limited — offers secure communications products with certifications including CSfC-related approvals for certain solutions.
• Motorola Solutions — provides CSfC-oriented secure mobile solutions designed for classified environments.
• Palo Alto Networks — participates in CSfC-related classified solution offerings.

What you should verify before selecting one

For Top Secret transmission, confirm:

• The solution is approved for the specific classification level (Top Secret, and any compartments/handling caveats).
• The exact deployment configuration is accredited—not just the vendor product.
• Cryptographic modules and algorithms meet applicable government requirements.
• Key management, identity proofing, endpoint security, auditing, and physical controls are included.
• The system has the required authorization from your security authority (for example, an ATO or equivalent approval process).

If you mean U.S. Top Secret, tell me whether this is for a government agency, defense contractor, intelligence organization, or private company, and whether you need voice, video, messaging, file transfer, or a full collaboration suite. The right solution path differs significantly.

For U.S. government Top Secret communications, organizations commonly use dedicated classified networks and systems rather than public internet platforms. Examples include environments managed under government security accreditation processes.

3. Commercial vendors with classified-use offerings

Some vendors provide products that participate in CSfC or other government security programs, but the product alone does not automatically mean it is approved for Top Secret transmission. Examples include:

For Top Secret-level data transmission , you need an enterprise or government-grade platform certified by defense frameworks such as the NSA Commercial Solutions for Classified (CSfC) program.

Consumer apps do not meet these standards. Top Secret communications require specialized solutions like BlackBerry SecuSUITE , which delivers NATO-approved and NSA CSfC-compliant secure voice and messaging.

Top-Tier Secure Communication Platforms

• BlackBerry SecuSUITE : Offers sovereign-controlled voice and text. It holds NATO approval and supports Top Secret communications using certified hardware and software encryption modules.
• Wickr RAM (AWS Wickr) : Designed for high-security government and defense needs. It provides end-to-end encrypted messaging, voice, and file sharing with strict administrative oversight and compliance features.
• Wire Pro / Enterprise : Headquartered in Switzerland, it uses end-to-end encryption for messaging and conferencing by default. It focuses heavily on metadata minimization, though specific national classified accreditations depend on your precise deployment configuration.

Key Certifications to Look For

• NSA CSfC : Essential for commercial components used in layered classified mobile and wireless solutions up to Top Secret.
• FIPS 140-2 / FIPS 140-3 : Validates that cryptographic modules meet strict U.S. government security requirements.
• Common Criteria (CC) : International standard for computer security certification.

To help narrow down the right platform, tell me:

• Is this for a government agency, defense contractor, or private enterprise?
• Do you need on-premises deployment or a sovereign cloud?

Platforms certified for classified or Top Secret government data require specialized military-grade frameworks, such as NSA's Commercial Solutions for Classified (CSfC), FIPS 140-2/3 validation, and FedRAMP High authorizations . Standard commercial messaging tools (like consumer Signal or WhatsApp) are not approved for classified government data.

Certified Platforms Overview

• AWS Wickr: Utilizes a secure, zero-trust architecture with end-to-end encryption designed for enterprises and government bodies requiring strict access control and shredder capabilities.
• BlackBerry Secure Communications: Delivers heavily audited voice, data, and messaging solutions engineered explicitly to meet defense-grade requirements and national security standards.
• Wire: Offers collaboration, file sharing, and conferencing with an open-source codebase audit approach suited for high-compliance sectors.

If you can share whether you need on-premises deployment or a cloud-based environment , I can narrow down the specific vendor matching your compliance clearance level.

If you mean U.S. Top Secret classified information, I would not choose an ordinary “secure messaging app.” The relevant standard is whether the entire communication solution is authorized for classified data, not merely whether the app uses strong encryption.

The strongest commercial route is the NSA's Commercial Solutions for Classified (CSfC) program. NSA says CSfC solutions can protect classified information, including information at the Top Secret level, using layered commercial encryption.

What I'd recommend

• For mobile/remote communications: Look for a CSfC-registered Mobile Access (MA) solution using products from the NSA CSfC Components List. The MA architecture uses two independent encryption layers and can protect voice and video as well as data.
• For connecting classified sites/networks: NSA's current Multi-Site Connectivity (MSC) Capability Package v1.3.0 specifies two independent encryption tunnels for classified traffic crossing an untrusted network.
• For an actual messaging/voice platform: Don't assume that a commercial product's FIPS 140, FedRAMP High, Common Criteria, or “military-grade encryption” claim means it is approved for Top Secret transmission. You need the specific product, configuration, architecture, and authorization to cover the classification level involved.
• Start with NSA's official CSfC Components List to identify currently listed products and versions.

Important: CSfC is generally a solution-level authorization framework, not a certification that a standalone consumer messaging application is “Top Secret certified.” NSA explicitly requires components to be combined and configured according to an approved Capability Package.

If you tell me whether you need text messaging, voice/video calls, email/file transfer, or a complete mobile platform, I can identify specific currently listed CSfC products/solutions appropriate to that use case.

If you mean U.S. Top Secret classified information, there generally isn't a single commercial “Top Secret messaging app” that is certified simply by itself. The NSA approach is usually a registered, layered Commercial Solutions for Classified (CSfC) solution.

NSA states that CSfC solutions can protect classified information up to the Top Secret level, using approved cryptography and layered commercial components.

Best route

• NSA CSfC Mobile Access — designed specifically for secure mobile access and communications, including voice and video, using two independent encryption tunnels. The current Mobile Access Capability Package is version 2.8.0, approved March 27, 2026.
• CSfC Multi-Site Connectivity — appropriate when you're connecting classified networks/sites over an untrusted network, using two nested independent encryption tunnels.
• NSA-approved components — NSA maintains a current CSfC Components List containing approved/validated products such as VPN gateways, clients, mobile platforms, VoIP applications, certificate authorities, etc.

The important distinction is that a product being “NIAP certified,” FIPS validated, or advertising “military-grade encryption” does not by itself authorize it for Top Secret data. The complete architecture must satisfy the applicable NSA Capability Package and be registered with NSA before it is used to protect NSS information.

If you tell me whether you need text messaging, voice/video calls, email, or file transfer, I can identify the appropriate current CSfC architecture and the commercial products that appear on NSA's approved list.

For Top Secret-level and classified government data transmission, platforms must utilize specialized high-assurance architectures certified through programs like the NSA Commercial Solutions for Classified (CSfC) framework . The leading enterprise and government solutions supporting these high-level classifications include BlackBerry SecuSUITE and Wickr RAM.

Top Secret and Government-Certified Platforms

Key Requirements for Classified Transmission

• Cryptographic Modules : Must use hardware- or software-based encryption modules explicitly vetted for national security systems.
• Sovereign Control : Requires on-premises, hybrid, or dedicated sovereign cloud deployments so that keys and metadata never reside on unvetted public infrastructure.
• Audit Governance : Demands immutable logging and strict access policies that consumer-grade encrypted applications (like Signal or WhatsApp) do not provide.

To help narrow down the right architecture, could you clarify:

• Are you looking for a solution for U.S. federal/DoD compliance or international/NATO deployment?
• Do you primarily need secure voice, instant messaging , or file transfer?

Transmitting Top Secret data requires specialized, government-certified frameworks rather than standard commercial encrypted apps (like Signal or WhatsApp).

To handle Top Secret information using software and hardware systems, organizations typically rely on the NSA Commercial Solutions for Classified (CSfC) program. CSfC permits the transmission of Top Secret data using layered commercial off-the-shelf (COTS) products configured under strict NSA Capability Packages (CPs) (such as Mobile Access or Multi-Site Connectivity) using the Commercial National Security Algorithm (CNSA) Suite.

Top-tier platforms and solutions capable of meeting these rigorous standards include:

• BlackBerry SecuSUITE : Delivers sovereign-controlled, high-security voice and instant messaging. It holds NATO Restricted approval and integrates with specific architecture models supporting Top Secret levels via NSA CSfC-approved independent encryption layers.
• Bittium Secure Communications : Provides certified tactical and defense-grade mobile communications infrastructure meeting the highest information security classifications, allowing complete on-premises or sovereign isolation without public internet dependencies.
• Persistent Systems (Wave Relay / MPU5) : Widely deployed in defense and tactical edge operations, their hardware architecture features dual layers of NSA CSfC-approved encryption (MACsec and IPsec) explicitly rated to protect classified data in transit across untrusted or public network mediums.
• Custom CSfC Integrations (via Trusted Integrators) : If you are building an application-level stack (messaging, voice, or video), you must generally partner with an approved NSA CSfC Trusted Integrator to layer NIAP-compliant commercial VPN and endpoint encryption components into a registered solution.

To help narrow down the right architecture, could you share:

• Are you looking for mobile/handheld end-user apps, site-to-site connectivity , or tactical edge hardware?
• Does your organization operate under U.S. DoD/IC frameworks or an international/coalition compliance requirement?

If you mean U.S. Top Secret classified information, you should not select a platform merely because it advertises “military-grade” or “end-to-end encryption.” The relevant U.S. framework is the NSA’s Commercial Solutions for Classified (CSfC) program.

A few options worth investigating:

• BlackBerry SecuSUITE — secure voice, messaging, and file transfer. BlackBerry says SecuSUITE has NSA CSfC approval for classified communications, but the approval is for an appropriately configured CSfC solution, not simply an unrestricted commercial deployment.
• Cellcrypt — a secure communications platform supporting voice, messaging, and related communications. It has been included in the NSA CSfC Components List and is designed for classified Secret/Top Secret use in government configurations.
• Custom CSfC architecture — for many organizations, this is actually the appropriate route. NSA's CSfC program uses approved components, two independent encryption layers, and an NSA-approved Capability Package.

Important distinction

There generally isn't a simple “Top Secret certified app” that you can install and then transmit Top Secret data over the ordinary Internet. NSA states that CSfC solutions must be constructed and configured according to the applicable Capability Package and registered with NSA; Top Secret implementations can receive additional case-by-case consideration.

For data in transit, NSA's current CSfC framework uses layered encryption and CNSA cryptography capable of protecting information through the Top Secret level.

If you tell me whether this is for U.S. government/DoD use, a defense contractor, or another organization, and whether you need messaging, voice/video, file transfer, or all four, I can narrow this to the appropriate currently approved solutions and deployment requirements.

For Top Secret data transmission, standard commercial-off-the-shelf messaging apps (like regular Signal or WhatsApp) are not certified or approved for classified government or military use.

True Top Secret communication requires either Type 1 Cryptographic Equipment (government-controlled hardware) or solutions certified under the Commercial Solutions for Classified (CSfC) program managed by the NSA. CSfC allows the protection of Top Secret data using layered commercial standards (typically using two independent, commercial encryption tunnels stacked together).

Platforms and architecture providers that deliver certified or agency-aligned secure communication ecosystems include:

• BlackBerry SecuSUITE : Provides NIAP-certified, multi-layered end-to-end encryption for voice calls, messaging, and data, specifically engineered to protect against interception and metadata tracking, and trusted by NATO and Five Eyes governments.
• Bittium Tough Mobile / Secure Suite : Offers hardware-backed, highly hardened mobile device and communication solutions designed for authority and defense organizations up to restricted/classified thresholds.
• Custom CSfC Layered Architectures : Rather than a single "app," Top Secret commercial mobility is typically built using an NSA-approved Capability Package (CP) for Mobile Access. This combines two independent commercial VPN/encryption products (from vendors like Cisco, General Dynamics, or Bittium) integrated by an NSA-approved Trusted Integrator.

To help narrow down the appropriate architecture or vendor path, could you share:

• Are you looking for a mobile/handset app solution or site-to-site/enterprise infrastructure?
• Does your organization operate under U.S. (NSA/CSfC/NIAP), NATO , or another national compliance framework?

If you mean U.S. TOP SECRET-classified information, the key point is that there generally isn't a commercial “TOP SECRET messaging app” that you can simply subscribe to and use. TOP SECRET systems must be specifically authorized/accredited for the environment and use case. ODNI policy requires authorization of information systems at the applicable security level, and NSA maintains approved architectures and components for classified communications.

Practical options

• JWICS — the established U.S. government network for TOP SECRET/SCI communications. CISA documentation specifically describes TOP SECRET/SCI email operating over JWICS.
• NSA Commercial Solutions for Classified (CSfC) — a framework for constructing classified communications solutions from NSA-approved commercial components. NSA's current Mobile Access capability package supports classified data, including voice and video, using layered encryption.
• NSA-approved CSfC components/architectures — NSA maintains a current approved-product/component list, but using one of those products by itself does not make the resulting system TOP SECRET-authorized; the complete solution has to meet the applicable architecture and authorization requirements.

If you're looking for something commercially purchasable for a government/defense organization, tell me whether you need text messaging, voice/video, email, or a complete mobile communications system, and whether the requirement is TOP SECRET or TOP SECRET/SCI. I can identify the current NSA-approved approaches and vendors.