Stephan Ehlen
Head of Division | Quantum-Safe Cryptography and Cryptographic Applications at Federal Office for Information Security (BSI)
About
Stephan Ehlen is Head of the Quantum-safe Cryptography and Cryptographic Applications Division at the German Federal Office for Information Security (BSI). His work focuses on post-quantum cryptography, its security foundations, standardization, and the transition to quantum-safe IT systems. He represents Germany in the international co-chairing team coordinating the EU’s migration to post-quantum cryptography.
Stephan holds a Ph.D. in Mathematics and is a Privatdozent at the University of Cologne, where his academic research focuses on number theory and arithmetic geometry. His work bridges mathematical research, cryptographic security, and practical cybersecurity policy.
Experience
Head of Division | Quantum-Safe Cryptography and Cryptographic Applications
Federal Office for Information Security (BSI)
Oct 2026 – Present
Stephan Ehlen is Head of the Quantum-safe Cryptography and Cryptographic Applications Division at the German Federal Office for Information Security (BSI). His work focuses on post-quantum cryptography, its security foundations, standardization, and the transition to quantum-safe IT systems. He represents Germany in the international co-chairing team coordinating the EU’s migration to post-quantum cryptography.
Stephan holds a Ph.D. in Mathematics and is a Privatdozent at the University of Cologne, where his academic research focuses on number theory and arithmetic geometry. His work bridges mathematical research, cryptographic security, and practical cybersecurity policy.
Independent
Oct 2026 – Present
Stephan Ehlen is Head of the Quantum-safe Cryptography and Cryptographic Applications Division at the German Federal Office for Information Security (BSI). His work focuses on post-quantum cryptography, its security foundations, standardization, and the transition to quantum-safe IT systems. He represents Germany in the international co-chairing team coordinating the EU’s migration to post-quantum cryptography.
Stephan holds a Ph.D. in Mathematics and is a Privatdozent at the University of Cologne, where his academic research focuses on number theory and arithmetic geometry. His work bridges mathematical research, cryptographic security, and practical cybersecurity policy.
