I'm Henrich C. Pöhls.

IT-Security Researcher, I love standards and think Integrity matters.

Picture Portrait of Henrich C. Poehls

Henrich C. Pöhls

Henrich C. Pöhls received his PhD. from University of Passau for his work on the interdisciplinary (cryptography and law) topic of Increasing the Legal Probative Value of Cryptographically Private Malleable Signatures. In this work he analysed the practical applications and legal implications of an advanced digital signature schemes, known as malleable signatures. In short, malleable signatures allow to specify and authorise subsequent modifications of signed documents. If the policy for subsequent modification is obliged to, the original signer's signature still verifies as valid on the modified document. This allows among other applications to carry out privacy-preserving modification, e.g. blackening out to conform to EU GDPR regulation, on signed documents while upholding the authenticity given by the digital signature for the remaining contents of the document. He showed in his thesis that the technical protection of the newly proposed cryptographic signature schemes allows to argue that they achieve the highest security level necessary for so-called qualified electronic signatures following EU eIDAS regulation. Thus those newly proposed malleable signatures give the documents signed there-with legal and thus also economical value.

Henrich C. Pöhls has authored and co-authored many academic publications, especially on the topic of tailoring cryptographic signature primitives for making them legally compliant and making their privacy enhancing features suitable for an application in various domains ranging from supply chain documents, to data from the Internet-of-Things, to the cloud. He is keen on interdisciplinary work especially in the field of cryptography, software development and law, as he thinks the more gaps between those three worlds can be bridged the more sound (=safe, secure and legally compliant) ICT-enhanced products and environments like smarthomes or smartcities become.

Henrich C. Pöhls also holds a graduate diploma in computer science (Dipl. Inf.) from the University of Hamburg and an M.Sc. in Information Security from Royal Holloway University of London.

He currently teaches the M.Sc. class on advanced it security. During the lecture and exercises he draws on a long experience as a research & teaching assistant to Prof. Joachim Posegga, from 2004 at University of Hamburg and since 2008 at the University of Passau. During that time, he devised and also delivered for many years a hands-on class at university and was teaching students how to apply theoretic concepts of computer and information security in practice.

He has successfully participated and lead collaborative research projects with academic and industrial partners on national as well as European/international level.


Henrich C. Pöhls is currently the editor, respectively co-editor, of two international standards projects:
  • ISO 23264-1 IT Security Techniques -- Redaction of Authentic Data -- Part:1 General
  • ISO 23264-2 IT Security Techniques -- Redaction of Authentic Data -- Part:2 Redactable signature schemes based on asymmetric mechanisms

Contact Me

Passau/Hamburg, Germany


Web: https://henrich.poehls.com

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