Mehdi Tibouchi

Writeup”: In anticipation of a package submission to the NIST Threshold Call

Cryptanalysis of an Unbounded Fully Homomorphic Encryption Scheme †

Gentry’s original blueprint for the construction of fully homomorphic encryption (FHE) starts from a somewhat homomorphic encryption scheme, that supports the homomorphic evaluation of arithmetic circuits of moderate multiplicative depth up to L, and whose decryption circuit itself can furthermore be “squashed” to a mu...

FrozenTRU: Cold Boot Attacks on NTRU-Based Hash-and-Sign Signatures

This paper investigates cold boot attacks against NTRU-based signature scheme Falcon and its ancestor, the signature scheme of Ducas–Lyubashevsky–Prest (DLP), and proposes countermeasures with negligible computational cost that significantly reduce the memory footprint of signing keys for Falcon and DLP, and at the sam...