Publications
Chosen filters:
Chosen filters:
An Optimal Universal Construction for the Threshold Implementation of Bijective S-Boxes KU Leuven
Threshold implementation is a method based on secret sharing to secure cryptographic ciphers (and in particular S-boxes) against differential power analysis side-channel attacks which was proposed by Nikova, Rechberger, and Rijmen in 2006. Until now, threshold implementations were only constructed for specific types of functions and some small S-boxes, but no generic construction was ever presented. In this paper, we present the first universal ...
A Geometric Approach to Symmetric-Key Cryptanalysis KU Leuven
The first part of this thesis develops a general approach to symmetric-key cryptanalysis. It brings together linear, differential and integral cryptanalysis in a single framework, and extends these techniques in several ways. A universal notion of trails is introduced, leading to a systematic method to evaluate the properties of iterated functions. The theory provides a unified description of extensions of linear cryptanalysis, and clarifies the ...
Chaghri - A FHE-friendly Block Cipher KU Leuven
The Recent progress in practical applications of secure computation protocols has also attracted attention to the symmetric-key primitives underlying them. Whereas traditional ciphers have evolved to be efficient with respect to certain performance metrics, advanced cryptographic protocols call for a different focus. The so called arithmetic complexity is viewed through the number and layout of non-linear operations in the circuit implemented by ...