Awesome Security accounts on Mastodon.
Security
Jeff Moss
@[email protected]Founder of DEF CON & Black Hat. Maintainer of infocon.org.
Member of the UK Gov Cybersecurity Advisory Board & The Council on Foreign Relations.
Working to get Hackers and Researchers a seat at the Policy table.
I'm interested in hacking, community, technology, privacy, security policy, and the intersection of civil society. (He/Him) Opinions are my own.
Previously member ONCD (2024-2025), CISA Cyber Security Advisory Council (2021-2025), and DHS Advisory Council (2009-2020)
Alex @ EMF
@[email protected]Security Engineer. I mostly post about IPv6 and pictures of my cats.
I help run Tor relays for @emeraldonion.
Also trying to bring more chaos to the UK with @MinistryOfChaos.

SteamDB
@[email protected]👀 Tracking all things Valve and Steam.
ℹ️ We are not affiliated with Valve in any way.
Henna Virkkunen
@[email protected]Executive Vice-President for Tech Sovereignty, Security and Democracy of the European Commission
Chris Petrilli
@[email protected]#BlackLivesMatter. Social Justice _________. Nerd. Architectural astronaut with a leaky suit. Do something with security at a gigantic non-profit. NB Pronouns: he/she/him/her. PNW
Press F1 to continue…
Ryan Castellucci (they/them)
@[email protected]
Hacker. Cryptography geek. Bureaucramancer. Ex-sysadmin. Nonbinary. Expat (US⮕UK).
My continuing mission:
To explore strange new platforms.
To seek out new bugs and new software.
To boldly shitpost where no one has shitposted before!
I'm suing the UK for more gender, please help with my legal bills: https://enby.org.uk
Helga
@[email protected]Interested in forensics & osint, IR etc. Reads scifi. Lives on Wiradjuri land. Loves trees, hates TERFs.
#FLOSS #FOSS #blueteam #cybersecurity
Lesley Carhart
@[email protected]
I am eminently qualified to speak from experience about a variety of dumpster fires.
ICS cybersecurity person, @pancakescon organizer, martial artist, marksman, humanist, level 14 Neutral Good rogue, USAF retired. Speaker available for gigs.
Gin connoisseur. Rodent parent. Some dipshit from Chicago. Now an immigrant in Melbourne.
I post *very serious* things about infosec. Thoughts are entirely my own.
'they/them' 🏳️🌈

Wren Reilly
@[email protected]She/her/they
I once worked with goats. I moved into tech.This was a mistake.
Expect sheep, wool, and textile history. Also birbs. Infosec on occasion.
I use content warnings for topics and images that can trigger PTSD. I do not use them to shield people ***without*** trauma from experiencing racism, sexism, transphobia, and other forms of discrimination. If you can ignore politics, you’re not likely in need of content warnings for much of anything, really.
Avatar: me holding a baby goat.
Konstantin Macher
@[email protected]digital rights advocate with a focus on (in-)security politics | feeling strongly about democracy | obviously antifascist | toots mostly in English and German.
Simon Zerafa
@[email protected]Old school IT Technician and Cyber Janitor.
Interests in InfoSEC, History, Physics and SciFi.
Anti-fascist. Wacky Improvisation and Drive by Philosophy Specialist.
The header image is a panaroma photograph of the view from the summit of Eryri on a clear sunny day. That's rare enough to be noteworthy 🙂
My avatar is a high resolution scan of a 120 film negative version of my portrait. You're not missing anything of artistic merit.
Chilly
🛡️
@[email protected]
Infosec, Psychology+SE, OSINT, Privacy, Planes (#EWR), NJ/Lenapehoking, Linux, Geopolitics and Environmentalism etc. #GAYINT
Huge SciFi fan 🖖
Just a cold robot on the internet hacking, shitposting, helping and doing things
I joke. A lot.
I post about planes and ATC stuff. A lot.
Pretty unfiltered, thoughts/opinions my own not my employers. Probably overanalyzing things... Or am I? What does that really mean? Maybe if I calculate the optimal amount of analysis...
Profile Pic: A Moopsy from Star Trek Lower Decks in a NTSB vest

Alpine Linux
@[email protected]
Alpine Linux is a security-oriented, lightweight Linux distribution based on musl libc and busybox.
Martin Seeger
@[email protected]Working at front lines of the IT and having fun there. Been around the Internet since 1992 and still in awe what has become of that little baby. Currently wanted for repeated "Nerd Sniping" on all continents.
Personal interests:
- IT Security
- Computer Games & TTRPGs
- Cycling
- Cooking & Baking
- Books, Movies, TV-Series (mostly F&SF)
- 3D printing (new!)
- Everything that blinks, has buttons to press and looks remotely gadgetoid
Everything i write, post, tweet, blog or blurp is just my personal opinion and is not the opinion or policy of my employer, my cat or my goldfish.
I post in English and German. Will try to mark each post correctly, but errors happen. Sorry for that.
I apologize if I am not following you back. This happens as my stream is already getting more posts than I can read.
Alexandre Dulaunoy
@[email protected]Enjoy when humans are using machines in unexpected ways. I break stuff and I do stuff.
The other side is at @a (photography, art and free software at large)
#infosec #opensource #threatintelligence #fedi22 #threatintel #searchable
The Calyx Institute
@[email protected]Our mission is to educate the public about privacy in digital communications and to develop tools that anyone can use. By embracing "privacy by design," we help make digital security and privacy more accessible to everyone. Help support our nonprofit mission-- become a member and get a hotspot with unlimited wifi or a phone with CalyxOS! https://members.calyxinstitute.org/enroll/membership
Scary Jerry 👻
@[email protected]Recovering CISO
May have an orchid problem
Bad photography
Worse dad jokes
The worst Infosec hot takes
Podcast: https://defensivesecurity.org
Blog: https://infosec.engineering
Twitter: @maliciouslink
https://Infosec.Exchange Admin
#infosec #security #cybersecurity #risk #fedi22
…and for fucks sake, be nice to each other. We are only here for a brief time. Make it enjoyable.
To help support the costs associated with running this instance, please consider donating. You can set up recurring donations here:
Patreon: https://www.patreon.com/infosecexchange
Ko-Fi: https://ko-fi.com/infosecexchange
Liberapay: https://liberapay.com/Infosec.exchange/
BuyMeACoffee: https://buymeacoffee.com/infosecexchange
You can also support with a one-time donation using PayPal to "[email protected]".
OWASP Foundation
@[email protected]We improve the security of apps with community-led open source projects, 260 local chapters, and tens of thousands of members worldwide
Karl Voit
@[email protected]
PIMfluencer
Influencing myself all the time. Rabbit-hole investigator.
Hide my German posts via selecting your preferred language(s) via:
Preferences→Other→Filter languages (will work in future)
I don't fav read toots.
#PIM #FOSS #Emacs
#orgmode
#Orgdown #bicycle #decentralization #security #privacy #Austria #Graz 
Joined Mastodon 2017-11
Indexed on tootfinder
NOT political correct!
Robotic Hacking Community
@[email protected]A dedicated DEF CON community focused on the security and safety of physical AI systems and robotics —machines that move, sense, decide, and act in the real world