The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 06, 2026
Filed:
Sep. 26, 2024
Chain Reaction, Ltd., Tel Aviv, IL;
Chain Reaction, Ltd., Tel Aviv, IL;
Abstract
According to an aspect of the present disclosed subject matter, an inter-stage KSK reuse method for determining a set of Key-Switching Keys (KSK) to be used in linear transformations of both Discrete Fourier Transform (DFT) and Inverse Discrete Fourier Transform (IDFT) matrices of Slots-to-Coefficients (S2C) and Coefficient-to-Slots (C2S) stages, respectively, comprising: selecting decomposition parameters and decomposing the DFT and IDFT matrices in accordance with the decomposition parameters into a plurality of merged nonzero submatrices; determining rotations offsets of the plurality of merged nonzero submatrices to enable an optimal number of rotations in the S2C stage to overlap with rotations in the C2S stage; calculating an effective set of KSK; and loading the effective set of KSKs to an internal memory of a hardware accelerator.
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