Tag: math

3 articles
Date Mon 09 September 2019
Author Elie Mengin
Category Math

In this blogpost, we present a general method to efficiently compare functions from a new binary against a large database (made of numerous known functions). This method has strong theoretical properties and is perfectly suited to address many conventional problems, such as classification, clustering or near duplicate detection.

Date Wed 20 April 2016
Authors Jean-Baptiste Bédrune, Marion Videau
Category Reverse-Engineering

An optimization for the finite field multiplication on 128-bit elements for AES-GCM exists whose explanation was not published, preventing any further application with different parameters. We reverse engineered the result to 1) get the explanation and 2) be able to apply it with other parameters.

Date Wed 23 September 2015
Author Ninon Eyrolles
Category Math

Mixed Boolean-Arithmetic expressions can be used as an obfuscation technique. Why are they hard to de-obfuscate, and what do we need to do so?