[Resource Topic] 2022/245: Entropic Hardness of Module-LWE from Module-NTRU

Welcome to the resource topic for 2022/245

Title:
Entropic Hardness of Module-LWE from Module-NTRU

Authors: Katharina Boudgoust, Corentin Jeudy, Adeline Roux-Langlois, Weiqiang Wen

Abstract:

The Module Learning With Errors problem (M-LWE) has gained popularity in recent years for its security-efficiency balance, and its hardness has been established for a number of variants. In this paper, we focus on proving the hardness of (search) M-LWE for general secret distributions, provided they carry sufficient min-entropy. This is called entropic hardness of M-LWE. First, we adapt the line of proof of Brakerski and Döttling on R-LWE (TCC’20) to prove that the existence of certain distributions implies the entropic hardness of M-LWE. Then, we provide one such distribution whose required properties rely on the hardness of the decisional Module-NTRU problem.

ePrint: https://eprint.iacr.org/2022/245

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