Johannes Buchmann

Johannes Alfred Buchmann (born November 20, 1953 in Cologne)[1] is a German computer scientist, mathematician and professor emeritus at the department of computer science of the Technische Universität Darmstadt.

Johannes Buchmann in 2016

He is known for his research in algorithmic number theory, algebra, post-quantum cryptography and IT security. In 1993, he received the Gottfried Wilhelm Leibniz Prize together with Claus-Peter Schnorr for his work in algorithmic number theory and cryptography. Buchmann also developed the stateful hash-based signature scheme XMSS, the first future-proof secure and practical signature scheme with minimal security requirements, which was declared the first international standard for post-quantum signature schemes in 2018. In addition, he further developed IT security research in Germany. His efforts led to the creation of ATHENE, the largest research center for IT security in Europe. For this he received the Konrad-Zuse-Medal for Services to Computer Science of the Gesellschaft für Informatik (GI) in 2017.

Life

Johannes Buchmann studied mathematics, physics, pedagogy and philosophy at the University of Cologne from 1974 to 1979 after graduating from high school in 1972 and completing his military service. After passing the first state examination for teaching at grammar schools in 1979, he taught mathematics at a Cologne secondary school from 1980 to 1983 while at the same time working as a research assistant at the university. In 1982 he did his doctorate at the university under the supervision of Hans-Joachim Stender. In 1984 he passed the second state examination. In 1985/86 he was with Hans Zassenhaus at Ohio State University on a scholarship from the Alexander von Humboldt Foundation. From 1986 to 1988 he was research assistant of Michael Pohst at the University of Düsseldorf, where he habilitated in 1988. Then he worked as professor of computer science at Saarland University. In 1966, he then was professor of computer science and mathematics at the Technische Universität Darmstadt. He retired in 2019.[2]

From 2001 to 2007, he was vice president for research at the Technische Universität Darmstadt. Since 2004 he has been chairman of the board of the Competence Center for Applied Security (CAST), the largest network for cyber security in German-speaking countries. From 2011 to 2013, Buchmann headed the project Internet Privacy - A Culture of Privacy and Trust on the Internet of the German Academy of Science and Engineering. From 2008 to 2011 he served as founding director of the Center for Advanced Security Research Darmstadt (CASED). From 2011 to 2016, he was a member of the board of directors of the European Center for Security and Privacy by Design (EC SPRIDE). From 2016 to 2018, Buchmann was vice director of the Center for Research in Security and Privacy (CRISP), the largest research institute for IT security in Europe. From 2014 to 2019 he was spokesman of the Collaborative Research Center CROSSING and from 2015 to 2019 spokesman of the profile area CYSEC of TU Darmstadt. He gave his farewell lecture on October 24, 2019.[3]

From 2017 to 2018, Johannes Buchmann trained as an MBSR (Mindfulness-Based Stress Reduction) teacher at the Institute for Mindfulness. Since then he has been working as a certified MBSR teacher.[4]

Buchmann is married and has two sons.

Work

Buchmann's achievements include scientific essays on algorithms in algebraic number theory, the construction of new cryptographic methods and the use of cryptographic methods in practice. Due to his collaboration with Kálmán Győry he has the Erdős number 2.[5] Buchmann dealt with algorithms in algebraic number theory and their application in cryptography. In 1988, he proposed with Hugh C. Williams a cryptographic system based on the discrete logarithmic problem in the ideal class group of imaginary-square number bodies (which, according to Carl Friedrich Gauss, is related to the theory of binary-square forms), which triggered further developments in cryptography with number bodies.[6]

Since 1996, Buchmann has been working intensively on the topic of public key infrastructures, for which he published the book Introduction to Public Key Infrastructures together with Evangelos Karatsiolis and Alexander Wiesmaier in 2013.[7] Buchmann has been working on post-quantum cryptography since 2003 and published a book of the same name together with Daniel J. Bernstein and Erik Dahmen in 2009.[8] Buchmann is also the author of the textbook Introduction to Cryptography, which has been translated into seven languages.[9]

In Saarbrücken, the research work of Buchmann concentrated on the theoretical cryptography and cryptanalysis of number theory-based public-key methods like RSA. During his time in Saarbrücken, Buchmann also founded the German Research Foundations first graduate school for computer science and was able to establish research in cryptography and IT security as an integral part of the university.[10]

In 2018, the stateful hash-based signature scheme XMSS developed by a team of researchers under the direction of Buchmann became the first international standard for post-quantum signature schemes. XMSS is the first future-proof secure and practical signature scheme with minimal security requirements. The work began in 2003.[11][12][13][14]

Awards

Publications
  • Introduction to Public Key Infrastructures. Johannes Buchmann, Evangelos Karatsiolis, Alexander Wiesmaier. Springer-Verlag Berlin Heidelberg, Dezember 2013. ISBN 978-3-642-40656-0
  • Personal Information Dashboard: Putting the Individual Back in Control. J. Buchmann, M. Nebel, A. Roßnagel, F. Shirazi, H. Simo, M. Waidner. In: M. Hildebrandt et al. : Digital Enlightenment Yearbook 2013, chap. Personal Information Dashboard: Putting the Individual Back in Control, p. 139-164, Iso Press, September 2013. ISBN 978-1-61499-294-3
  • Internet Privacy. In: Johannes Buchmann, p. 328, Springer Verlag, September 2012. ISBN 978-3-642-31942-6
  • Post-Quantum Cryptography. In: Daniel J. Bernstein, Johannes Buchmann, Erik Dahmen, p. 245, Springer, Oktober 2008. ISBN 978-3-540-88701-0
  • Buchmann J., Dahmen E., Hülsing A. (2011) XMSS - A Practical Forward Secure Signature Scheme Based on Minimal Security Assumptions. In: Yang BY. (eds) Post-Quantum Cryptography. PQCrypto 2011. Lecture Notes in Computer Science, vol 7071. Springer, Berlin, Heidelberg. ISBN 978-3-642-25404-8, 978-3-642-25405-5. DOI: 10.1007/978-3-642-25405-5_8
gollark: Make that function return `length` and do `local length = whatever()`.
gollark: Just don't do that.
gollark: Oh right, no, your code does set `length` and stuff globally.
gollark: What?
gollark: Wait, you mean function parameters? No.

References
  1. "Curriculum vitae of Johannes Buchmann from the website of the Leopoldina" (PDF).
  2. Computeralgebra, CDC-Theoretische Informatik- Kryptographie und. "Curriculum Vitae of Johannes A. Buchmann". CDC - Theoretische Informatik - Kryptographie und Computeralgebra – Technische Universität Darmstadt. Retrieved 2019-10-31.
  3. Darmstadt, Technische Universität (2019-10-23). "Glaubt an die Vernunft". Technische Universität Darmstadt (in German). Retrieved 2019-10-31.
  4. "Johannes Buchmann - Über mich". www.johannesbuchmann.de (in German). Retrieved 2019-10-31.
  5. Jerry Grossman (2015-07-14). "Erdos2, Version 2015". The Erdös Number Project. Oakland University. Retrieved 2019-06-30.
  6. Buchmann, Takagi, Vollmer: Number field cryptography. Technical Report 2003 (PDF; 186 kB)
  7. Buchmann, Johannes & Karatsiolis, Evangelos & Wiesmaier, Alexander. (2013). Introduction to Public Key Infrastructures. 10.1007/978-3-642-40657-7.
  8. Bernstein, Daniel J., Buchmann, Johannes, and Dahmen, Erik, Post-Quantum Cryptography, 2009, Springer-Verlag, Berlin-Heidleberg. DOI: 10.1007/978-3-540-88702-7
  9. Buchmann, Johannes. (2002). Introduction to Cryptography. DOI: 10.1007/978-3-642-11186-0.
  10. "Laudatio for Johannes Buchmann by José L. Encarnação" (PDF).
  11. "Security: Erster Standard für Post-Quantum-Signaturen". www.industry-of-things.de (in German). Retrieved 2019-10-11.
  12. online, heise. "Digitale Signaturen: Erster Standard für Post-Quantum-Signaturen". Security (in German). Retrieved 2019-10-11.
  13. "TU Darmstadt: Ein Rezept gegen die Macht der Quantencomputer". idw-online.de. Retrieved 2019-10-30.
  14. Buchmann J., Dahmen E., Hülsing A. (2011) XMSS - A Practical Forward Secure Signature Scheme Based on Minimal Security Assumptions. In: Yang BY. (eds) Post-Quantum Cryptography. PQCrypto 2011. Lecture Notes in Computer Science, vol 7071. Springer, Berlin, Heidelberg
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