16. Mai 2024
Physical Unclonable Functions: Coded Modulation, Shaping, and Helper Data Schemes
Gastvortrag von
Prof. Dr.-Ing. Robert Fischer
Universität Ulm, Deutschland

Prof. Dr.-Ing. Robert Fischer, Universität Ulm, Deutschland, wird im Mai das Institute of Telecommunications besuchen und den Vortrag halten.

Datum, Zeit:
16. Mai 2024, 14:30 bis 15:30 Uhr

EI 4 Reithoffer HS

Institute of Telecommunications
Norbert Görtz

Titel: „Physical Unclonable Functions: Coded Modulation, Shaping, and Helper Data Schemes“

Vortragender: Prof. Dr.-Ing. Robert Fischer

Physical unclonable functions (PUFs) generate fingerprints by exploiting randomness that intrinsically occurs in integrated circuits due to uncontrollable variations in the manufacturing process of physical objects. Most of the literature deals with binary PUFs and employ binary hard-decision decoding to stabilize the response against environmental variations and readout errors.

It is of interest to i) increase the reliability by employing soft-decision decoding and ii) increase the size of the extracted key by resorting to higher-order alphabet or, even better, by applying methods from coded modulation and signal shaping.

In this talk, a suited model for studying PUFs with real-valued readout is presented. The transition from binary PUFs to schemes utilizing coded modulation and signal shaping will be discussed. The main item in PUFs is the so-called helper data scheme, which in the first place enables decoding. Suited schemes are presented and it is shown how the helper data, which has to be independent of the PUF readout, can be designed to improve decodability.