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Exploring Potentials and Challenges of Blockchain-based Public Key Infrastructures Thomas Hepp, Fabian Sph, Alexander Schnhals, Ph Philip Ehret , and Bela Gipp WHOS BEHIND THE RESEARCH? Bela Gipp Thomas Hepp Alexander Schoenhals

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Exploring Potentials and Challenges

f Blockchain-based Public Key Infrastructures

Thomas Hepp, Fabian Späh, Alexander Schönhals, Ph Philip Ehret, and Bela Gipp

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14/05/2019

WHO’S BEHIND THE RESEARCH?

Exploring Potentials and Challenges of Blockchain-based PKIs – T. Hepp, F. Späh, A. Schönhals, P.Ehret, B. Gipp 2

Department of Computer and Information Science at the University of Konstanz/Wuppertal, Germany. Our research covers the fields of:

Data Science
Information Retrieval, Analysis & Visualization
Blockchain Technology
Digital Media & Web Engineering

Thomas Hepp thomas.hepp@uni.kn Philip Ehret philip.ehret@uni.kn Alexander Schoenhals alexander.schoenhals@uni.kn Bela Gipp gipp@uni-wuppertal.de

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Outline

14/05/2019 3

Motivation
PKIs
Blockchain-Based PKIs
Challenges
Conclusion
Future Work

Exploring Potentials and Challenges of Blockchain-based PKIs – T. Hepp, F. Späh, A. Schönhals, P.Ehret, B. Gipp

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Exploring Potentials and Challenges of Blockchain-based PKIs – T. Hepp, F. Späh, A. Schönhals, P.Ehret, B. Gipp 14/05/2019 4

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Exploring Potentials and Challenges of Blockchain-based PKIs – T. Hepp, F. Späh, A. Schönhals, P.Ehret, B. Gipp 14/05/2019 5

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Exploring Potentials and Challenges of Blockchain-based PKIs – T. Hepp, F. Späh, A. Schönhals, P.Ehret, B. Gipp 14/05/2019 16

Scalability solved à DPKI
Designated blockchains, e.g. Namecoin [11], Frederiksson [12]
PKI schemes for existing blockchains: Catena [13], PBCert [14]

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13. Shixiong Yao, Jing Chen, Kun He, Ruiying Du, Tianqing Zhu, Xin Chen: PBCert: Privacy-Preserving Blockchain-Based Certificate Status

Validation Toward Mass Storage Management

14. Alin Tomescu, Srinivas Devadas: Catena: Efficient Non-equivocation via Bitcoin