Secunet Security Networks

The company develops the SINA (Secure Inter-Network Architecture) secure-networking system, which was commissioned by the German Federal Office for Information Security (BSI) in 1999 and is used in government, security-cleared businesses and critical infrastructure. Secunet was founded in 1997 as an independent company emerging from TÜV Mitte AG. Giesecke+Devrient acquired a majority stake in the company in 2004 and remains its majority shareholder. Secunet has been publicly traded since 1999, with its shares listed in the Prime Standard of the Frankfurt Stock Exchange. In 2025, the company reported revenue of €458.8 million. With its products and services, Secunet primarily focuses on clients in the public administration and ministries, the healthcare sector, the defense and space sector as well as specifically security and police agencies. One of Secunet's premier products is the SINA (Secure Inter-Network Architecture) product line which was co-developed with Germany's Federal Office for Information Security (BSI). The SINA architecture forms the basis for Germany's classified information networks and is used in a broad range of public institutions in Germany and abroad.