Home   /   Projects and Programs

GÖKTÜRK-1 Satellite National Crypto Subsystem


GÖKTÜRK-1 Satellite National Crypto Subsystem developed by TÜBİTAK BİLGEM is a system that provides secure transmission of commands to be sent from ground stations to the satellite and the high resolution image received from the satellite to ground stations.

The National Crypto Subsystem includes national crypto devices and associated key management and upload devices integrated into the satellite and ground stations. All developed devices have device level crypto analysis, COMSEC and TEMPEST approvals.

The GÖKTÜRK-1 Satellite National Crypto Subsystem has been in use since December 2016, when the GÖKTÜRK-1 Satellite was launched, thus making the crypto device integrated into the satellite the first national equipment to gain history in this field.

Discover institutes laboratories technologies products projects of BİLGEM.

Competence Centers

MILSEC 4 - Secure IP Terminal


While the MİLSEC-4 terminal offers an up-to-date solution for next-generation secure communication (voice, data and video) in IP networks, it provides an uninterrupted communication service by maintaining the compatibility of secure voice communication in PSTN networks with PSTN secure phones in use.

Configuration, surveillance and software update processes of MILSEC-4 terminals are carried out securely remotely using the Security Management Center (GYM). MİLSEC-4 terminal is capable of IP Network Key Loading (IPAAY) through secure communication with GYM without the need for an additional device.

MİLSEC-4 terminals are interoperable with MİLSEC-1A and MİLSEC-2 phones and offer the opportunity to replace MİLSEC-1A and MİLSEC-2 phones without interruption in the gradual transformation of PSTN networks to next generation IP networks.


  • End-to-end secure voice communication in PSTN networks
  • End-to-end secure voice, image and data transmission in IP networks
  • NATO SCIP compliance on IP networks
  • Compatibility with commercial SIP products
  • Interoperability with MILSEC1A and MILSEC2 secure phones
  • National and AES crypto algorithms
  • Remote software update
  • Easy operation with touch screen

It is subject to the sales license to be given by the Ministry of National Defense.