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:
Jun. 30, 2026
Filed:
May. 23, 2022
Zama Sas, Paris, FR;
Ilaria Chillotti, Paris, FR;
Damien Ligier, Paris, FR;
Jean-Baptiste Orfila, Vincennes, FR;
Samuel Tap, Villeurbanne, FR;
ZAMA SAS, Paris, FR;
Abstract
Some embodiments are directed to a computer-implemented method () of performing a computation on LWE-encrypted values. The invention relates to the TFHE setting in which the encryption supports a programmable bootstrapping operation that evaluates an LWE decryption in an exponent of a GLWE-encrypted monomial. In this setting, a LWE-encrypted product value is computed based on one or more LWE-encrypted input values by applying a cryptographic key switching operation to convert the LWE-encrypted input values to GLWE-encrypted polynomials, wherein a coefficient of an polynomial is a linear combination of the set of input values; applying an encrypted polynomial multiplication in the GLWE domain, and applying a cryptographic sample extraction operation to the resulting GLWE-encrypted polynomial to obtain the LWE-encrypted product value as an encryption of one of its coefficients.