Logo Made in Germany GITEX 2017


Booth number: SR-

About us

Celebrating its 12th anniversary at GITEX, GSMK displays the full ecosystem of secure telecommunication systems, counter intelligence systems and protection systems for the cellular air interface and signaling infrastructure.

360° protected GSMK CryptoPhones combine device protection and end-to-end encrypted calls and messages with functionality of modern Smartphones. Independent source code review allows GSMK’s customers to ascertain themselves about the quality of the products.

GSMK OverWatch is the field proven system for detection and localization of illegal IMSI catchers. OverWatch enables to gather intelligence about espionage activities, to pin-point the attackers and re-establish security on the air interface by elimination of illegal IMSI catchers, area wide, 24/7.

GSMK OverSight is the SS7 intrusion detection system that sets the standard in price/performance ratio. GSMK OverSight is easily installed, as its non-invasive design avoids interference with network functionality, while the detection ensures best protection against SS7 attacks.

Products and services

A) Secure communication systems:

GSMK CryptoPhones
• 360° protection
• Device protection by hardened OS and Baseband Firewall® gen2
• Call and message protection by strong end-to-end encryption
• Protection of meta data by camouflaging of connections
• Detection of attacks
• All networks: Mobile, fixed line and satellite
• Private routing infrastructure
• Independent source code inspection possible
• Main users: Government & enterprises

B) Network security & counter intelligence:

GSMK OverWatch
• Detection system against illegal IMSI catchers
• Area wide detection and localization, 24/7
• Integration in existing alarm systems
• Counter intelligence
• Finally restoration of security on the air interface of cellular networks
• Main users: Government institutions

GSMK OverSight
• SS7 vulnerability assessments of cellular networks
• SS7 intrusion detection systems
• Counter intelligence and protection against attacks
• Non invasive & easy installation
• Main users: Government institutions & network operators

News & Innovations

GSMK OverWatch: Protection against illegal IMSI catchers, 24/7 and area wide 

GSMK OverWatch makes it possible to detect illegal eavesdropping installations, anytime and area wide.

For the first time, the chances are shifting in favor of the forces, which are protecting territories against illegal eavesdropping.

OverWatch can be spread across whole cities, or even countries. OverWatch is looking for illegal base stations, so-called IMSI catchers, constantly and area wide. If such illegal IMSI catchers are activated, OverWatch automatically triggers an alarm and allows for immediate triangulation and thus confiscation of the spy equipment.

GSMK OverWatch is the perfect and efficient solution for restoration communication security on the air interface.

The GSMK team is looking forward to your visit during GITEX!

Alternatively contact for information about GSMK OverWatch.



Marienstr. 11
10117 Berlin

Phone: +49 30 24625000
Fax: +49 30 24625001

Konstantin Koenig
Head of Sales & Marketing
Phone: +49 30 24625000

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