By the end of this year, I will have given four talks this year.

I did some research on GnuPG (GPG) memory forensics with my colleague Sylvain Pelissier and presented that research at Nullcon Berlin 2022 in April, and then at SSTIC2022 in June.

I also did some research on …

I gave two talks, lately. One was about replacing passwords with FIDO2 password authentication at Pass the SALT 2020.

I gave the other one with my colleague Tommmaso. It was about an open source Oblivious RAM filesystem prototype I wrote in Rust, called oramfs.

I gave a 3-hour workshop about blockchain vulnerabilities and exploitation in practice at BlackAlps19 in Yverdon, Switzerland today.

Here are the slides: blackalps19-blockchain-workshop.pdf

If you were in Las Vegas for DEF CON 26 this year you may have seen a talk I gave with my colleague Yolan Romailler about collecting public keys and breaking them.

The video will be uploaded to Youtube eventually and I will update this post with its link. For …

I co-wrote a blog post on WireGuard with adr13n earlier this month.

Read it on research.kudelskisecurity.com.

For this to work you will need an NVIDIA GPU.

Get the mpv-build scripts, tune the mpv and ffmpeg options and build:

#!/bin/sh

mkdir -p ~/git
cd ~/git
git clone https://github.com/mpv-player/mpv-build.git
cd mpv-build

# write mpv_options file
cat << EOF > mpv_options
--enable-cuda-hwaccel
EOF

# write …

On Arch gpg-agent comes with the gnupg package so no other package is needed if gpg is already installed.

I use gpg-agent for temporarily caching the PIN for my Yubikey so that I don't have to type it everytime as well as for ssh-agent emulation.

Setup

Add the following lines …

Systemd is great. Here are a few things you can do with it.

Editing unit files

I usually can't remember where unit files are located but that's not an issue. Systemd will let you edit them just by knowing the unit name.

$ export SYSTEMD_EDITOR=vim
$ sudo -E systemctl edit …

Over the years I have learned many tips and tricks when working with Bash. Some are well known while others are not. Here are a few tricks that I find the most useful.

Searching history

So you know you just typed that command but cannot remember what it was. Fine …

I attended Spark Summit Europe 2016 in Brussels this year in October, a conference where Apache Spark enthusiasts meet up. I've been using Spark for nearly a year now on multiple projects and was delighted to see so many Spark users at Square Brussels.

There were three trainings to choose …