Category: Cryptography

In March 2024, SandboxAQ proposed a CTF around Post-Quantum Cryptography (and more specifically Kyber's key exchange) for the RWPQC workshop. Here is our write-up of the solutions to the challenges.

We announce the release of a new version of Blue Galaxy Energy, our white-box cryptanalysis tool implementing the BGE attack against AES. This version addresses the main limitations of the previous version.

We introduce a new white-box cryptanalysis tool based on the pioneering BGE paper but without known open source public implementation so far.

We are releasing a new cryptanalysis tool based on a known paper but without known open source public implementation so far.

In the first part of the blogpost, we tackled the issue of 1v1 conversations, and it is now time to see how this applies to 1vMANY: group chats! We will give an overview of current solutions, and then have a look at the Messaging Layer Security working group.

Today's communications are, as frequently requested by users, more and more secure. In this first part of the blogpost, we will detail some key features of instant messaging applications, in the setting where (only) two parties want to communicate.

Post-quantum cryptography is an active field of research, especially since the NIST Call for Submissions in 2016 to design new standards for asymmetric key cryptography. The aim of post-quantum cryptography is to mitigate the risk of a large-scale quantum computer which may break all the asymmetric cryptography that is deployed today. This blogpost will present the activity state of the post-quantum cryptography field and sketch the challenges for the deployment of post-quantum safe standards for the industry, both in term of internal infrastructures and security products.

This blog post introduces a plugin that provides end-to-end encryption (E2EE) to Mattermost.

This post is a noob-friendly introduction to whiteboxes along with the presentation and explanation of a (not-new) collision-based attack. The attack is demonstrated against a public whitebox, using QBDI to instrument and analyze the target in order to produce traces of execution.

On how we used LIEF to lift an Android x86_64 library to Linux to perform our usual white-box attacks on it.