Solutions that work · Even in real-world conditions
Silentel is secure and works in real-world conditions. In its own comparative tests (January–February 2025), ICSL tested several market-leading secure messengers. The result was clear.
Silentel remains stable and intelligible at up to ~50% packet loss — while most “secure” messengers fail at 20–30%. In ICSL tests, many promoted products proved to be fair-weather solutions only.
Hold/resume, call switching, call waiting, robust signalling — even across mixed network scenarios. Many competitors lack these basic functions or implement them inconsistently.
Data remain encrypted on the server. Nothing remains on the device after logout — no local messages, no keys, no backups in iCloud or Google. Stolen device = no data loss.
Silentel has been in use by security agencies since 2006 and in 2010 became the world’s first mobile secure communications solution listed in the NATO catalogue (NIAPC). The current version is NATO-approved with post-quantum cryptography — the first messenger product for government users with PQC implemented.
We will show you the comparative test results in a confidential briefing.