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Analysis of Communication Channels Related to Physical Unclonable Functions

Maringer, Georg and Xhemrishi, Marvin and Puchinger, Sven and Garb, Kathrin and Liu, Hedongliang and Jerkovits, Thomas and Kürzinger, Ludwig and Hiller, Matthias (2022) Analysis of Communication Channels Related to Physical Unclonable Functions. In: WCC 2022. WCC 2022: The Twelfth International Workshop on Coding and Cryptography, 7-11 March 2022, Rostock, Germany but was held online as a web conference. (In Press)

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Cryptographic algorithms rely on the secrecy of their corresponding keys. On embedded systems with standard CMOS chips, where secure permanent memory such as flash is not available as a key storage, the secret key can be derived from Physical Unclonable Functions (PUFs) that make use of minuscule manufacturing variations of, for instance, SRAM cells. Since PUFs are affected by environmental changes, the reliable reproduction of the PUF key requires error correction. For silicon PUFs with binary output, errors occur in the form of bitflips within the PUF response. Modeling the channel as a Binary Symmetric Channel (BSC) with fixed crossover probability p is only a first-order approximation of the real behavior of the PUF response. We propose a more realistic channel model, referred to as the Varying Binary Symmetric Channel (VBSC), which takes into account that the reliability of different PUF response bits may not be equal. We investigate its channel capacity for various scenarios which differ in the channel state information (CSI) present at encoder and decoder. We compare the capacity results for the VBSC for the different CSI cases with reference to the distribution of the bitflip probability according to a work by Maes et al.

Item URL in elib:https://elib.dlr.de/186302/
Document Type:Conference or Workshop Item (Speech)
Title:Analysis of Communication Channels Related to Physical Unclonable Functions
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Puchinger, SvenUNSPECIFIEDhttps://orcid.org/0000-0002-7474-2678UNSPECIFIED
Jerkovits, ThomasUNSPECIFIEDhttps://orcid.org/0000-0002-7538-7639UNSPECIFIED
Date:March 2022
Journal or Publication Title:WCC 2022
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Status:In Press
Keywords:Physical Unclonable Functions Channel Model Channel Capacity Channels with Random State
Event Title:WCC 2022: The Twelfth International Workshop on Coding and Cryptography
Event Location:Rostock, Germany but was held online as a web conference
Event Type:international Conference
Event Dates:7-11 March 2022
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Communication, Navigation, Quantum Technology
DLR - Research area:Raumfahrt
DLR - Program:R KNQ - Communication, Navigation, Quantum Technology
DLR - Research theme (Project):R - Project Cybersecurity for Autonomous and Networked Systems [KNQ]
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Satellite Networks
Deposited By: Jerkovits, Thomas
Deposited On:06 May 2022 11:59
Last Modified:12 May 2022 09:20

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