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Laurent Cheylus

@lcheylus@bsd.network
mastodon 3.5.19+iceage
  • Open on bsd.network

Software engineer specialized in Cybersecurity

Linux OpenBSD FreeBSD - FOSS Contributor
Lyon (France) addict
Messages in French 🇫🇷 and English 🇬🇧

0 Followers
0 Following
30 Posts
Joined April 27, 2022
Twitter:
https://twitter.com/lcheylus
GitHub:
https://github.com/lcheylus
Open post
Laurent Cheylus @lcheylus@bsd.network
· 1w ago
Deshittification of your Smart TV at Home using OpenBSD pf and Unbound: block Ad Networks and Telemetry while keeping apps like Netflix and Smart TVs working flawlessly - Detailed Article by Lari Huttunen #OpenBSD #Privacy https://fabricati-diem.inform.social/post/deshittification-as-a-service/
Fabricati Diem

Deshittification as a Service: Reclaiming Privacy and Performance with OpenBSD pf and Unbound

How to use OpenBSD's Packet Filter and Unbound to build a zero-trust network sandbox that neutralizes Smart TV telemetry—and inadvertently speeds up streaming across your entire home network.

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago
Replying to
@genma@framapiaf.org Ça dépend des perfs que tu souhaites avoir pour le throughput de ton accès WAN (j'imagine une fibre à 1 Gbps). Les mini-PC fanless de la marque Qotom sont pas mal. Sinon tu as aussi pléthore de choix chez AliExpress en mini-PC avec proc Intel N105 + X interfaces Gigabit + Wifi.
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 7mo ago

Motorola announces a partnership with GrapheneOS Foundation ; they will work to strengthen Smartphone Security and collaborate on future Devices engineered with #GrapheneOS compatibility https://motorolanews.com/motorola-three-new-b2b-solutions-at-mwc-2026/

Motorola News | Motorola's new partnership with GrapheneOS
Global Blog

Motorola News | Motorola's new partnership with GrapheneOS

Motorola announces three new B2B solutions at MWC 2026, including GrapheneOS partnership, Moto Analytics and more.

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 7mo ago

Researchers at IMDEA Networks Institute, together with European partners, have found that Tire Pressure Monitoring System (TPMS) in modern Cars can unintentionally expose Drivers to Tracking #Infosec #Privacy https://techxplore.com/news/2026-02-car-sensors-track.html

techxplore.com
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 6mo ago

Abaddon: an alternative Discord Client with Voice Support made with C++ and GTK 3, without Electron #OSS #Discord https://github.com/uowuo/abaddon

GitHub

GitHub - uowuo/abaddon: An alternative Discord client with voice support made with C++ and GTK 3

An alternative Discord client with voice support made with C++ and GTK 3 - uowuo/abaddon

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 6mo ago

How to build and install the Electrum Bitcoin Wallet on OpenBSD - Short article by Aaron Miller @aaronm04@fosstodon.org #OpenBSD #Bitcoin ₿ https://iforgotmy.name/articles/2026-03-12-electrum-on-openbsd.html

iforgotmy.name

Setting up Electrum on OpenBSD 7.8

Setting up Electrum on OpenBSD 7.8

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 6mo ago

A 27-year-old OpenBSD Vulnerability found in TCP SACK assessing Claude Mythos Preview’s Cybersecurity Capabilities ; other Bugs found in FFmpeg, FreeBSD NFS, Linux kernel... #OpenBSD #Infosec https://red.anthropic.com/2026/mythos-preview/

Claude Mythos Preview's cybersecurity capabilities
red.anthropic.com

Claude Mythos Preview's cybersecurity capabilities

Technical details on how we tested Claude Mythos Preview, a model strikingly capable at computer security tasks, and what we found.

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 6mo ago

Interview de Roberto Di Cosmo à propos du projet « Software Heritage » (préservation du code source de logiciels) - Épisode du #Podcast Monde Numérique par Jérôme Colombain #Audio 🎧️ https://mondenumerique.info/podcast/monde-numerique/episode/pourquoi-il-faut-archiver-tous-les-logiciels-du-monde-roberto-di-cosmo-software-heritage

🎤 Pourquoi il faut archiver tous les logiciels du monde (Roberto Di Cosmo, Software Heritage) | Monde Numérique
Monde Numérique

🎤 Pourquoi il faut archiver tous les logiciels du monde (Roberto Di Cosmo, Software Heritage) | Monde Numérique

Et si le code source était le patrimoine le plus précieux de notre époque ? Roberto Di Cosmo explique pourquoi il est vital de préserver tous les logiciels,...

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 6mo ago

Initial implementation of Ownership for the V programming language ; inspired by Rust that tracks owned values and prevents use-after-move bugs at compile time #Programming #Vlang https://github.com/vlang/v/blob/master/doc/ownership.md

GitHub

v/doc/ownership.md at master · vlang/v

Simple, fast, safe, compiled language for developing maintainable software. Compiles itself in <1s with zero library dependencies. Supports automatic C => V translation. https://vlang.io - vl...

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 8mo ago

Mandiant released an NTLMv1 Database (Rainbow Table) that will allow Defenders and Researchers (and, of course, malicious Hackers, too) to recover Passwords in under 12 Hours using Consumer Hardware costing less than $600 USD #Infosec #Passwords https://arstechnica.com/security/2026/01/mandiant-releases-rainbow-table-that-cracks-weak-admin-password-in-12-hours/

Mandiant releases rainbow table that cracks weak admin password in 12 hours
Ars Technica

Mandiant releases rainbow table that cracks weak admin password in 12 hours

Windows laggards still using the vulnerable hashing function: Your days are numbered.

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 6mo ago

Pantone, l'histoire de l'étrange entreprise qui détient les couleurs du monde entier - Passionnante #Video par What a Fail ! https://youtu.be/1bf6daRS6P8

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago
Fairphone is recruiting a senior Software Engineer focused on embedded & Android Systems for their Software Engineering Team #Android https://fairphone.jobs.personio.com/job/2599490
fairphone.jobs.personio.com
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 6mo ago

Bilan 1 an après la sortie de Saracroche, application mobile permettant de bloquer les spams téléphoniques - Bravo à Camille Bouvat pour cette app open-source respectueuse la vie privée https://cbouvat.com/blog/1an-saracroche/

cbouvat.com

Saracroche : un an déjà | Camille Bouvat

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago

FreeBSD on 2026 Google Summer of Code: NanoBSD Reimagined, Live-patching for the FreeBSD kernel, Native MPLS Support, Bluetooth Support for HID Devices... #GSoC #FreeBSD https://summerofcode.withgoogle.com/programs/2026/organizations/the-freebsd-project

summerofcode.withgoogle.com
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 13mo ago

6 major Password Managers with Tens of Millions of Users are currently vulnerable to unpatched Clickjacking Flaws that could allow Attackers to steal your Secrets - Public disclosure by Marek Tóth at DEF CON 33 #Infosec #Vulnerability https://socket.dev/blog/password-manager-clickjacking

socket.dev
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago

Une très bonne synthèse sur la faille CopyFail impactant le noyau Linux : historique de la faille, mécanisme d'exploitation, gestion érratique de la divulgation, mitigation - par Linuxtricks #Infosec #Linux https://www.linuxtricks.fr/news/10-logiciels-libres/600-copy-fail-cve-2026-31431-synthese-technique-sur-cette-faille-linux/

Copy Fail (CVE-2026-31431) : Synthèse technique sur cette faille Linux
Linuxtricks.fr

Copy Fail (CVE-2026-31431) : Synthèse technique sur cette faille Linux

Bonjour à tous, Dans cet article, que je prends le temps d

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 7mo ago

Les JdLL (Journées du Logiciel Libre) auront lieu à l'ENS Lyon les 30 et 31 mai 2026. L'appel à participation est ouvert jusqu'au 15 mars #OpenSource #Lyon https://www.jdll.org/

Accueil | JdLL
jdll.org

Accueil | JdLL

GravCMS

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago

Researchers at the University of Southern California report a new Type of Electronic Memory Device that kept working reliably at 700 degrees Celsius 🔥 #Research #Electronics https://viterbischool.usc.edu/news/2026/03/usc-scientists-build-a-memory-chip-that-survives-temperatures-hotter-than-lava/

USC Scientists Build a Memory Chip That Survives Temperatures Hotter Than Lava - USC Viterbi | School of Engineering
USC Viterbi | School of Engineering

USC Scientists Build a Memory Chip That Survives Temperatures Hotter Than Lava - USC Viterbi | School of Engineering

A discovery using graphene has produced a record-breaking high-temperature memory device, with implications for space exploration, deep-earth drilling, and the future of AI hardware.

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago

Credit Cards are Vulnerable to Brute Force Kind Attacks - Detailed article by Metin Ozyildirim #Infosec #Hacking https://metin.nextc.org/posts/Credit_Cards_Are_Vulnerable_To_Brute_Force_Kind_Attacks.html

metin.nextc.org

Credit Cards Are Vulnerable To Brute Force Kind Attacks | Metin's Blog

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago

forjego-cli: an open-source CLI application written in Rust, for interacting with Forgejo (self-hosted lightweight software forge) https://codeberg.org/forgejo-contrib/forgejo-cli

Codeberg.org

forgejo-cli

CLI application for interacting with Forgejo

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 12mo ago

How to secure a Linux Server: an evolving How-To Guide ; Basics, SSH Server, Network, Audit... #Infosec #Linux https://github.com/imthenachoman/How-To-Secure-A-Linux-Server

GitHub

GitHub - imthenachoman/How-To-Secure-A-Linux-Server: An evolving how-to guide for securing a Linux server.

An evolving how-to guide for securing a Linux server. - imthenachoman/How-To-Secure-A-Linux-Server

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 4mo ago
Boosted by @oxy@social.bsdlab.au
Import of LibreWolf browser in OpenBSD ports: modified version of Mozilla Firefox focused on privacy, security, and software freedom. Work by Leah Rowe @libreleah@mas.to (also author of Libreboot) #Firefox #OpenBSD https://marc.info/?l=openbsd-ports-cvs&m=178093524651764
marc.info

'CVS: cvs.openbsd.org: ports' - MARC

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 2mo ago
Quickly tested the Firefox Nightly version on my Linux desktop, not a huge fan of the UI modifications with rounded tabs and text inputs #Firefox https://blog.mozilla.org/en/firefox/new-firefox-design/
Inside the new Firefox design: speed, privacy, and customization | The Mozilla Blog
blog.mozilla.org

Inside the new Firefox design: speed, privacy, and customization | The Mozilla Blog

Update on September 29, 2026: Starting today, the new Firefox design is rolling out to everyone who uses the browser across desktop and mobile devices. It

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 2mo ago
How to cut the Windows GDID (Global Device Identifier), the Tracker that follows you even through a VPN - Detailed Article and Powershell scripts available on GitHub, by Korben #Windows #Privacy https://korben.info/en/gdid-windows-cut-tracker-vpn.html
GDID Windows - Cut the tracker that follows you even through a VPN - Korben
Korben

GDID Windows - Cut the tracker that follows you even through a VPN - Korben

The GDID helped catch a hacker despite his VPN. I set up a VM to see if it can be neutralized: what works, what doesn

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 3w ago
Ken Thompson’s Trusting-Trust Attack is not limited to Compilers, this research paper shows that it can be constructed around GNU strip, an ordinary build utility that neither inspects nor generates source code #Research #Infosec https://arxiv.org/abs/2607.24888
Trusting-Trust Attack against an Entire Linux Distribution through Binary Manipulation
arXiv.org

Trusting-Trust Attack against an Entire Linux Distribution through Binary Manipulation

Ken Thompson's trusting-trust attack, in which a compromised compiler backdoors the programs it builds and reproduces the backdoor in subsequent rebuilds of itself, is widely regarded as a threat specific to compilers. We show that it is not. We construct a complete trusting-trust attack around GNU strip, an ordinary build utility that neither inspects nor generates source code, using only manipulations of finished ELF files. In the bootstrap of the NixOS Linux distribution, a single tampered st

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 2w ago
Boosted by @oxy@social.bsdlab.au
Introduction à Garage, solution open-source compatible S3, auto-hébergée et résiliente (support du multi-nœuds) - Article du magazine SysOps en libre accès (janvier 2026) #S3 #SysOps https://connect.ed-diamond.com/linux-pratique/lp-153/garage-l-alternative-libre-au-stockage-en-datacenter
connect.ed-diamond.com
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago
Replying to
@sebsauvage@framapiaf.org Le monde appartient à ceux dont les agents IA tournent toute la nuit 😉​
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 3mo ago
Boosted by @oxy@social.bsdlab.au
Replying to
@joel@gts.tumfatig.net Y'a pas de mystère, l'arbre de décision de tout ingénieur/bricoleur 😂​
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Open post
Laurent Cheylus @lcheylus@bsd.network
· 5mo ago
Replying to
@bortzmeyer@mastodon.gougere.fr Si jamais t'as besoin d'une élévation de privilèges sous Linux dans le futur 😉​, tu devrais trouver ton bonheur avec un des GTFOBins => https://gtfobins.org/
GTFOBins
gtfobins.org

GTFOBins

GTFOBins is a curated list of Unix-like executables that can be used to bypass local security restrictions in misconfigured systems.

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Open post
Laurent Cheylus @lcheylus@bsd.network
· 2mo ago
Replying to
@elilla@transmom.love The most important thing in proposal A is that it does not forbid AI use in upstream projects and upstream patches/security fixes 😃​
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