US 12,335,415 B2
Method and system for decorrelating input signals from a physical identifier
Onur Günlü, Berlin (DE); and Rafael F. Schaefer, Berlin (DE)
Assigned to TECHNISCHE UNIVERSITÄT BERLIN, Berlin (DE)
Appl. No. 17/911,581
Filed by TECHNISCHE UNIVERSITÄT BERLIN, Berlin (DE)
PCT Filed Mar. 22, 2021, PCT No. PCT/EP2021/057263
§ 371(c)(1), (2) Date Sep. 14, 2022,
PCT Pub. No. WO2021/191144, PCT Pub. Date Sep. 30, 2021.
Claims priority of application No. 20164810 (EP), filed on Mar. 23, 2020.
Prior Publication US 2024/0305480 A1, Sep. 12, 2024
Int. Cl. H04L 9/32 (2006.01)
CPC H04L 9/3278 (2013.01) 9 Claims
OG exemplary drawing
 
1. A method for decorrelating input signals from a physical identifier, in a system having one or more processors, comprising:
providing input signals from a physical identifier being a physical unclonable function;
providing a decorrelation matrix;
generating output signals, comprising decorrelating the input signals by applying the decorrelation matrix to the input signals; and
providing the output signals at an output;
wherein the providing of the decorrelation matrix comprises
providing an initial matrix, the initial matrix being an orthogonal matrix; and
determining the decorrelation matrix from the initial matrix by at least once selecting and applying at least one of a plurality of matrix extensions on the initial matrix, wherein each of the plurality of matrix extensions generates, from an input orthogonal matrix, a further orthogonal matrix with higher matrix dimension than the input orthogonal matrix, wherein the determining of the decorrelation matrix from the initial matrix comprises adaptively selecting at least one of the plurality of matrix extensions dependent on the input signals.