Vlad Rico
vladrico.bsky.social
Vlad Rico
@vladrico.bsky.social
Reposted by Vlad Rico
Reposted by Vlad Rico
"We need to go deeper" version CPU :
Ring 0 is a highly-privileged state on CPUs.


Negative Ring Levels have even *higher* privilege. You just haven’t heard of them.


For X86, Ring -1 is Hardware Virtualization, Ring -2 is System Management Mode, Ring -3 is Intel ME / AMD PSP.

Arm get's even weirder:
August 7, 2025 at 11:12 AM
Reposted by Vlad Rico
J’aime beaucoup beaucoup cet article :)
August 4, 2025 at 5:57 PM
Reposted by Vlad Rico
🔥 The future of RFID hacking isn’t dead, its even more...

At #WHY2025, Kirils and I are breaking down current RFID hacking situation

No fluff. Just spilling the beans.

🗓️ 9th of August 13:00 at Andromeda
🔗 cfp.why2025.org/why2025/talk...

RT if you’re ready.
Decoding RFID: A comprehensive overview of security, attacks, and the latest innovations WHY2025
RFID reverse engineering has seen significant advancements, yet a comprehensive overview of the field remains scattered across research and practitioner communities. Here the authors presents a struc...
cfp.why2025.org
July 13, 2025 at 2:40 PM
Reposted by Vlad Rico
Des assos proposent des services pour dire au revoir aux Gafam. @framasoft.org en dénombre des dizaines.

Elles accompagnent et forment des professionnels et des entreprises qui ne veulent travailler qu'avec des logiciels libres.

Focus sur des initiatives bretonnes par @rachelknaebel.bsky.social ⤵️
Graphisme, messagerie, cloud… des acteurs du logiciel libre offrent des alternatives aux Gafam
Des associations proposent des services pour dire au revoir à Google et Microsoft ; des entreprises choisissent de ne travailler qu'avec des logiciels libres. L'écosystème du numérique libéré des Gafa...
basta.media
July 23, 2025 at 8:42 AM
Reposted by Vlad Rico
A good Introduction at Fully Homomorphic Encryption (FHE): it allows arbitrary computations on ciphertext (encrypted data) — without needing to decrypt it first - Article by Barış Özmen #Cryptography bozmen.io/fhe
Fully Homomorphic Encryption and the Dawn of A Truly Private Internet
Barış Özmen Blog
bozmen.io
July 23, 2025 at 7:10 PM
Reposted by Vlad Rico
Do you know a device that does keyboard/mouse sharing similar to x2x / synergy but in hardware, without having to install anything?
I don't want a kvm, I want to control 2 machines with 1 kbd/mouse, focusing on where the mouse is.
I foresee various hacky methods but if anybody already did this...
July 21, 2025 at 7:36 AM
Reposted by Vlad Rico
Pourquoi le DNS de Kubernetes est claqué au sol (notamment avec kube-proxy en iptables) mcorbin.fr/posts/2025-0...
Pourquoi le DNS de Kubernetes est claqué au sol (notamment avec kube-proxy en iptables)
mcorbin Tech Blog
mcorbin.fr
June 28, 2025 at 8:06 PM
Reposted by Vlad Rico
How we ran a Unix-like OS (Xv6) on our home-built CPU with our home-built C compiler fuel.edby.coffee/posts/how-we...
How we ran a Unix-like OS (Xv6) on our home-built CPU with our home-built C compiler
[Thanks for many comments and votes on Hacker News! ] It’s been two years since I started working as a software engineer. I sometimes tell my colleagues about a student project I did in my junior year...
fuel.edby.coffee
June 28, 2025 at 7:03 PM
Reposted by Vlad Rico
My super simple jail manager for FreeBSD has been accepted in the FreeBSD Ports collection as sysutils/jailmanager. Soon coming to a package repository near you.
https://github.com/slicer69/jailmanager
GitHub - slicer69/JailManager: A Bash shell script for creating, managing, and removing jails.
A Bash shell script for creating, managing, and removing jails. - slicer69/JailManager
github.com
June 6, 2025 at 1:35 PM
Reposted by Vlad Rico
Une pincée de Quake III, un soupçon de maths, un poil d’informatique et même une réf à Julien Clerc…

Parfait pour le weekend 👍

scienceetonnante.substack.com/p/le-plus-gr...
Le plus gros hack de l'histoire du jeu vidéo (1/2)
Une astuce mathématico-informatique diabolique issue de Quake III, dont l'analyse nous permet de mieux comprendre comment les ordinateurs manipulent les nombres.
scienceetonnante.substack.com
May 31, 2025 at 2:24 PM
Reposted by Vlad Rico
Faire du scripting en C ? Facile avec CJIT, un interpréteur C multiplateforme basé sur TinyCC de Fabrice Bellard et inspiré du HolyC de Terry Davis ⬇️

dyne.org/cjit/
CJIT - C, Just in Time!
CJIT is a lightweight, free and open source C interpreter that lets you run C code instantly, without needing to build it first. Made by Dyne.org
dyne.org
April 20, 2025 at 7:13 AM
Reposted by Vlad Rico
Pour les ptits loups que ca pourrait intéresser : On recrute un postdoc en robotique dans mon équipe de recherche pour bosser avec nous sur le projet "abeilles" dont je vous ai déjà parlé !

seafile.lirmm.fr/f/53b9f0ff5f...

Si vous connaissez des jeunes docteurs qui cherche un taff ...
seafile.lirmm.fr
March 21, 2025 at 10:42 AM
Reposted by Vlad Rico
Nouvelle vidéo : tout sur le solaire photovoltaïque, et la recherche du panneau solaire ultime !
Avec les chercheurs du @cea.fr qui travaillent sur le sujet.
youtu.be/xOTrdWla_6c
☀️ La recherche du panneau solaire ultime
YouTube video by DEFAKATOR
youtu.be
March 12, 2025 at 6:34 PM
Reposted by Vlad Rico
Our 2025030900 release currently in the Beta channel is the first one with support for managing hardware-based virtual machines via the Terminal app in Android 15 QPR2. Since then, we've backported massive improvements to the feature for an upcoming new release, maybe even today.
March 10, 2025 at 5:32 PM
Reposted by Vlad Rico
​presenterm : Un outil de présentation en Markdown pour le terminal

👉 Le projet : github.com/mfontanin...
👉 En savoir plus : mfontanini.github.io...
March 11, 2025 at 11:31 AM
Reposted by Vlad Rico
Attention warpzone, vous n'en sortirez plus : "Let's code a TCP/IP stack" :
www.saminiir.com/lets-code-tc...
Let's code a TCP/IP stack, 1: Ethernet & ARP
Writing your own TCP/IP stack may seem like a daunting task. Indeed, TCP has accumulated many specifications over its lifetime of more than thirty years. The core specification, however, is seemingly ...
www.saminiir.com
March 7, 2025 at 6:01 AM
Reposted by Vlad Rico
Tieeeeens, un film réalisé sous Blender a gagné un Oscar !
March 3, 2025 at 7:07 AM
Reposted by Vlad Rico
I had the day off and... I spent it flushing an article idea that was at the back of my mind and that I had been wanting to write for ~2 weeks. I'm not an expert on this topic but I think the content is a reasonable intro! Happy read and happy weekend!

blogsystem5.substack.com/p/hardware-a...
Hardware autoconf: ACPI & Device Tree
An overview of how a Unix-like BSD kernel performs hardware discovery on x86 and ARM to bind device drivers to hardware devices
blogsystem5.substack.com
March 1, 2025 at 12:34 AM
Reposted by Vlad Rico
Holy fluck ! Electronic Arts vient juste de publier l'ensemble des codes sources des Command & Conquer sur Github : github.com/electronicarts
Cela fait donc 6 repositories plein de sources bien baveuses et luxurieuses !
February 27, 2025 at 10:00 PM
Reposted by Vlad Rico
Lettre ouverte : Non à l'intimidation des contributeurs bénévoles : fr.wikipedia.org/wiki/Wikip%C...
February 17, 2025 at 1:23 PM
Reposted by Vlad Rico
Vu sur X
February 12, 2025 at 10:32 PM
Reposted by Vlad Rico
Crevard un jour, crevard toujours. Pour ceux qui se demandent pourquoi je continue à chier sur Qwant
February 11, 2025 at 9:33 AM