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Silentel as-a-Service Premium — available immediately Silentel Hosted / Cloud Silentel On-Premise Custom Compare all deployment models · Features & Functions

What we do ∨

Secure Voice, Messaging & Data Communications Deployment, Setup & Managed Environments Crisis Backup as-a-Service Live Drone Streaming in the Messenger Quantum-Resistant Communications Custom Devices — Bespoke Endpoints Testing & Evaluation Training & Support

Who is it for? ∨

Executive & VIP Government & Military Critical Infrastructure & Businesses Communicate Anonymously and Securely Crisis Communications & Backup

Why ICSL? ∨

Neutrality for Our Customers We examine the details ICSL — since 1995 Discretion & Principles Approvals & Clearances Solutions that work

ICSL Consulting ↗

ICSL COMSEC · What We Do

Secure Voice, Messaging & Data Communications

End-to-end encrypted · No metadata · Resistant to forensic analysis · For the toughest requirements

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What we do

Secure Communications — End to End

Every message, every call, every file: encrypted before leaving your device. And above all — nothing remains on the device! No metadata. No data traces. Resistant to forensic analysis.

Nothing Remains on the Device

When logged out, no content data are available on the device — losing it would not matter, and no remote wipe is needed.

Remote Wiping and Access Control That Work

With MDM systems, remote wiping and access controls always depend on the wipe command still reaching the device. That is not the case with what we offer.

Access and Exclusion by Design

If you block a participant, even temporarily, neither that participant nor anyone else can force access.

Data Consistency and Uniformity

Available on multiple devices without scattering and duplicating data across them.

Threat Model

What This Protects Against

Every threat has an architectural answer — beyond a promise.

Eavesdropping & Interception

End-to-end encryption with cryptographic parameters exceeding Top Secret requirements — only ciphertext exists in transit.

Metadata Analysis

Who communicates with whom, when and how often — often more revealing than the content. No analysable metadata are generated here.

Device Loss & Seizure

No content on the device, nothing to extract forensically. A lost or seized device reveals nothing.

Harvest Now, Decrypt Later

Communications intercepted today remain unreadable even to future quantum computers — post-quantum cryptography is fully implemented.

Administrator Access

Zero-knowledge architecture: even server administrators, including ICSL's, cannot decrypt content.

Infrastructure Failure

If your normal IT is compromised, the solution continues communicating independently — through to dedicated Crisis Backup.

How It Works

Three Steps. No Leap of Faith Required.

Encrypted Before Leaving the Device

Calls, messages and files are encrypted on your device — plaintext content exists only with you.

Transmission Without Visibility

The server relays only ciphertext. It cannot read it — and never needs to. That is precisely why the same infrastructure is approved for government use.

Decrypted Only at the Recipient's End

Only the authorised recipient can read the content. After logout, what remains on the device is: nothing.

Everyday Use

As Simple as a Normal Phone Call

On Hotel Wi-Fi While Travelling

A board member travelling: unfamiliar networks, foreign countries — the connection remains secure and the device stays clean, even at a border inspection.

Classified Communications

Government agencies and armed forces: approved for classified use on commercially available iOS, Android and Windows devices.

Professionals Bound by Confidentiality

Law firms, trustees, supervisory board members: client and business secrets without data traces — available immediately as a service.

Secure call on a smartphone — works like a normal phone call

Frequently Asked Questions

Brief Answers

Do I need special devices?

No. The solution runs on commercially available iOS, Android and Windows devices — approved for classified use. For particularly demanding requirements, there are also Custom Devices.

Do I have to operate my own infrastructure?

Only if you want to. From as-a-Service (active the same day) through Hosted to On-Premise — compare all deployment models.

What happens if a device is lost?

Nothing. No content data are stored on the device — no data loss, no remote wipe needed, no forensic analysis possible.

Can ICSL view my communications?

No. Data and voice are never available unencrypted — even to administrators. That is why ICSL operates the same infrastructure for government and private customers.

How quickly can I get started?

With Silentel as-a-Service Premium the same day — available anonymously, without your own backend. On-Premise typically within 2–4 weeks.

Communications security is a decision, not a product.

Arrange a confidential briefing. We will analyse your current communications situation and show you practical options.