NATO-approved, with post-quantum encryption throughout, and proven where others stop: in real-world conditions, on poor networks and in classified use.
The same technology governments trust — for you personally. Available anonymously, active today, no data traces on the device.
Crisis Backup as-a-Service: immediately activatable communications, fully independent of your infrastructure — even during an ongoing cyberattack.
Sovereignty begins with your communications. ICSL brings it to you — available immediately, with quantum-safe encryption and no data traces. Since 1995, from Vienna, for governments and people with responsibility.
The same message, two perspectives. End-to-end encrypted with post-quantum cryptography — anything intercepted in transit remains worthless forever.
Plaintext exists only on your devices. Not on the server, not with the operator, not with ICSL.
Even tomorrow's quantum computer cannot decrypt this: the algorithms exceed CNSA requirements for Top Secret.
Why this will still hold in ten years → Quantum-Resistant Communications
No project measured in months. Three routes — all using NATO-approved Silentel technology, all supported by ICSL. You simply choose the level of control.
Unsure which model fits? Compare all deployment models →
ICSL operates NATO-approved government technology as a service, making it usable without an in-house IT department. And we do not stop there: we adapt, extend and develop it until the solution fits you precisely.
More about ICSL →What was once reserved for states is available from ICSL as a service: anonymously, without your own backend, active the same day — and without sharing data with third parties.
Endpoint security & MDM, secure devices from off-the-shelf to custom hardware, bespoke app editions with your own branding: ICSL delivers the complete environment from one provider.
Silentel adaptations, integration into your workflows, training your technical team for complete independence — with personal, multilingual support.
We integrate leading European technologies and recommend what fits your requirements. No customer names, no reference lists — discretion is a working principle.
The technology we rely on has been in government use since 2004 — without a known security incident to date. More than two decades of daily operation in government and security agencies: a record that must be demonstrated, not merely claimed.
Security is only half the equation — it also has to work. In our own comparative tests, Silentel remains stable and intelligible at up to ~50 % packet loss, where many heavily promoted products have long since failed. Solutions that work →
More about us → About ICSL · Exclusively COMSEC · Discretion
All details → Features & Functions · Approvals & Clearances
Our customers regard secure communications as an operational necessity — each for a different reason.
Communications suitable for classified use, with NATO approval and central administration — proven since 2001.
Your solution →Discreet, available anonymously, fully supported — government-grade security made easy to use, without your own IT.
Your solution →Leadership communications that remain available during a cyberattack — independent of your IT.
Your solution →All audiences & use cases → Who ICSL Is For
Immediate security is the beginning. Behind it is the full COMSEC spectrum — from A to Z, from one provider, vendor-neutral.
End-to-end encrypted · no data traces · resistant to forensic analysis
Explore →From on-premises to managed services · vendor-neutral · turnkey
Explore →Ready to activate immediately · independent of your IT · even during a cyberattack
Explore →Video streaming directly in the highly secure messenger · for operational teams
Explore →Designed and built for your project and requirements · exclusively for you
Explore →Independent assessment · no manufacturer marketing · the customer decides
Explore →Training & support included → Training for Complete Independence
Whether you need highly secure communications, a managed environment, a dedicated customer setup or an initial structured discussion of deployment options — ICSL is available for a confidential first conversation.