International Journal of Information Security

, Volume 9, Issue 5, pp 327–335

Flowchart description of security primitives for controlled physical unclonable functions

Regular Contribution

DOI: 10.1007/s10207-010-0113-2

Cite this article as:
Škorić, B. & Makkes, M.X. Int. J. Inf. Secur. (2010) 9: 327. doi:10.1007/s10207-010-0113-2


Physical Unclonable Functions (PUFs) are physical objects that are unique, practically unclonable and that behave like a random function when subjected to a challenge. Their use has been proposed for authentication tokens and anti-counterfeiting. A Controlled PUF (CPUF) consists of a PUF and a control layer that restricts a user’s access to the PUF input and output. CPUFs can be used for secure key storage, authentication, certified execution of programs, and certified measurements. In this paper we modify a number of protocols involving CPUFs in order to improve their security. Our modifications mainly consist of encryption of a larger portion of the message traffic, and additional restrictions on the CPUF accessibility which prevents some denial of service attacks. We simplify the description of CPUF protocols by using flowchart notation. Furthermore we explicitly show how the helper data for the PUFs is handled.


Physical unclonable function PUF Certified execution Controlled PUF 

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  1. 1.Eindhoven University of TechnologyEindhovenThe Netherlands

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