NCSC UK @ncsc.gov.uk We are the National Cyber Security Centre – part of the UK’s intelligence & cyber agency GCHQ. We help to make the UK the safest place to live and work online.
John Scott-Railton @jsrailton.bsky.social Chasing digital badness. Senior Researcher at Citizen Lab, but words here are mine.
Matthijs R. Koot @cyberwar.nl IT, privacy, security, democracy. PhD. PGP: 51F9 8FC9 C92A 1165 (http://keybase.io/mrkoot). Employed as IT security specialist.
Mastodon: @mrkoot@infosec.exchange
LinkedIn: /in/mrkoot
Dan Black @danwblack.bsky.social Previously Google, NATO, 🇨🇦 Government. Views mine and mine only.
Stephen Tomkinson @neonbunny9.bsky.social Red Team Operator @ CrowdStrike
Binding Hook @bindinghook.bsky.social Expert commentary on emerging tech and security. Send us your article ideas at pitch@bindinghook.com. Project from @VirtualRoutes.bsky.social
Kevin Beaumont @doublepulsar.com cybersecurity weather man. scanning the horizons for cloudy cyber. Expert at nothing except computer rubbish. Anti-ransomware since 2015.
Matthew Garrett @mjg59.eicar-test-file.zip Former biologist. Actual PhD in genetics. Security, OS security teaching at https://www.ischool.berkeley.edu.
Blog: https://codon.org.uk/~mjg59/blog
Signal: @mjg.59
He/him
Opinions expressed here are mine, not my employer's
Gabriella "Biella" Coleman @biella.bsky.social Professor of Anthropology @Harvard, Hacker Studies & More https://gabriellacoleman.org/
James Wilson @jameswilson.io Reformed CTO turned Podcaster @ https://risky.biz/
🦝 Pepper Raccoon: Trash Priestess 🦝 @pepperraccoon.com Somewhat Known Conservation Artist | Merch Designer | Hacker Companion | Latinx Queer | She/They | NZ•Aotearoa Based/Ship Worldwide | NO AI #Art
Shop: pepperraccoon.com
Christian @xntrik.wtf Aussie appsec dork, worked at a bunch of places. Opinions my own and all that jazz.
https://xntrik.wtf
Alec Muffett @alecmuffett.bsky.social everybody deserves good security.
https://alecmuffett.com/about
Tom Uren @tom.risky.biz Author of the Seriously Risky Business cyber security newsletter
Paged Out! @pagedout.bsky.social Paged Out! is a free magazine about programming, hacking, security hacking, retro computers, modern computers, electronics, demoscene, and other similar topics. Always accepting submissions of one-page articles.- W @wadealcorn.bsky.social @wadealcorn.bsky.social
pARODY @lordparody.bsky.social Cat wrangler, internet crime scene cleaner.
Nick Frichette @frichetten.com Staff Security Researcher @datadoghq | DEF CON/Black Hat USA main stage speaker | he/him | OSCP OSWE | I turned hacking AWS into a career | Tweets are my own | Created https://hackingthe.cloud
Dino A. Dai Zovi @ddz.bsky.social I drink amari and I know things. $ddz
LMDDGTFY: https://duckduckgo.com/?q=dino+dai+zovi
NYC/BK
Dominic White @singe.bsky.social Hacker at Orange Cyberdefense's SensePost Team
https://hello.singe.za.net/
Kim Zetter @kimzetter.bsky.social Journalist - cyber/natn'l security. Speaker. Georgetown adjunct prof. Author - COUNTDOWN TO ZERO DAY: Stuxnet and the Launch of the World's First Digital Weapon
Signal: KimZ.42
https://www.zetter-zeroday.com
ash @repne.bsky.social Currently focused on Red Teaming/Adversarial Simulation @ Google. Previously App Sec, Malware RE and Threat Intel. I also like video games and general tech.
@icesurfer.bsky.social @icesurfer.bsky.social Infosec Swiss Army Knife. Tec diver. Occasional (but published) travel photographer. Opinions are all mine and usually wrong.
wirepair @wirepair.bsky.social Personal: https://wirepair.org - building an MMORPG
Work: Principal Vulnerability Researcher @ GitLab
Post more on mastodon: @wirepair@mastodon.social
Ange @angealbertini.bsky.social Reverse engineer, file formats expert.
Corkami, CPS2Shock, PoC||GTFO, Sha1tered, Magika...
Security engineer @ Google. He/him.
Alvaro Muñoz @pwntester.bsky.social Security Researcher with @GHSecurityLab. CTF #int3pids. Opinions here are mine!
Phrack Zine @phrack.org since 1985
https://phrack.org
@jsun1590.bsky.social @jsun1590.bsky.social
Alexandria Ocasio-Cortez @aoc.bsky.social Waitress turned Congresswoman for the Bronx and Queens. Grassroots elected, small-dollar supported. A better world is possible.
ocasiocortez.com
Dmitri Alperovitch @dmitri.silverado.org Geopolitics, Russia, China, Cyber
Chairman @silverado.org
Author of WorldOnTheBrink.com
Host GeopoliticsDecanted.com podcast
Founder Alperovitch Institute for Cybersecurity Studies at Johns Hopkins SAIS
Co-Founder CrowdStrike
@DAlperovitch elsewhere
argp @argp.bsky.social Hacker. Ascetic. Phrack author. The most technical boy in town.
@marcograss.bsky.social @marcograss.bsky.social
ChrisRohlf @chrisrohlf.bsky.social 🇺🇸 Waging algorithmic warfare since 2003. Non-Resident Research Fellow CSET Georgetown CyberAI
banty @thebantyone.bsky.social computers are hard
Natalie Silvanovich @natashenka.bsky.social Google Project Zero
Russ (rustla) @rust.la Pentester who often hangs out with the blue team. (he/him)
@ghostccamm.bsky.social @ghostccamm.bsky.social Nerd hacking web and other stuff
Tormented by a spirit named MC Fat Monke
Matthew Green @matthewdgreen.bsky.social I teach cryptography at Johns Hopkins. https://blog.cryptographyengineering.com
James Kettle @jameskettle.com Director of Research at @portswigger.net
Also known as albinowax
Portfolio: https://jameskettle.com/
LiveOverflow 🔴 @liveoverflow.bsky.social wannabe hacker... he/him
🌱 grow your hacking skills https://hextree.io
Gareth Heyes @garethheyes.co.uk Web security researcher at PortSwigger. Author of JavaScript for Hackers, Shazzer and Hackvertor.
https://garethheyes.co.uk/#latestBook
William Bowling @vakzz.bsky.social Security Engineer at Zellic, a.k.a vakzz when doing bug bounties and CTFs with Perfect Blue - https://devcraft.io
Nicolas Grégoire @agarri.fr Web hacker 😈
Burp Suite Pro trainer 👨🏫
Maintainer of @mastering-burp.agarri.fr 🛠️
Alex Chapman @ajxchapman.bsky.social Full Time #BugBounty Vulnerability Researcher
https://blog.ajxchapman.com
Sam Curry @zlz.bsky.social
Joe FitzPatrick @securelyfitz.bsky.social Trainer and Researcher, SecuringHardware.com
elttam @elttam.bsky.social Expert-led penetration testing, supported by AI-assisted analysis, to uncover real weaknesses and strengthen systems against real-world threats.
InfoSect @infosectcbr.bsky.social
Catalin Cimpanu @campuscodi.risky.biz ☆ Cybersecurity reporter
★ Newsletters at Risky Business
#infosec #cybersecurity
https://risky.biz
BSides Canberra @bsidescbr.bsky.social 24-26th September 2026
https://bsidescbr.com.au/
Luke Jahnke @nastystereo.com Blogging at https://nastystereo.com
Heather Adkins @argv.bsky.social VP Security at Google. Co-Chair Cybersafety Review Board, Co-Author Building Secure and Reliable Systems. r00t. Medieval historian.
Shlee fucked around and @shl.ee Teacher, Mother, Lover, Enabler
📧 hey@shl.ee / ashley@generozity.charity
Mastodon: @shlee@aus.social
He/They
@hzon.bsky.social @hzon.bsky.social
David (DWIZZZLE) Weston @dwizzzle.bsky.social Corporate Vice President, OS Security and Enterprise @Microsoft
Arrigo Triulzi @cynicalsecurity.bsky.social IT Security, cynically aged. Maths. Some nukes. Longing for Symbolics and Connection Machines. Keeper of Ancient Computing Lore. Wassenaar intangible Ⓐ
crazy hugsy @blah.cat Someone who likes debuggers a bit too much
🇨🇦 • 🇰🇷 • 🇫🇷
Filippo Valsorda @filippo.abyssdomain.expert @geomys.org founder / RC F'13, F2'17
Cryptogopher / Go cryptography maintainer
https://filippo.io / https://github.com/FiloSottile
https://mkcert.dev / https://age-encryption.org
https://sunlight.dev / https://filippo.io/newsletter
@mikko @mikko.bsky.social Fighting malicious use of technology.
Kelly Shortridge @shortridge.bsky.social software resilience, cybersecurity, complex systems | chief product officer @fastly.com | nyc
“In the information society, nobody thinks. We expected to banish paper, but we actually banished thought.”
kellyshortridge.com
@swagitda_ on Twitter
Zoltan Madarassy @loltan.bsky.social
snare @snare.ho.ax Nah
4Dgifts @4dgifts.bsky.social culprit %x%x%n%n
Aaron Portnoy @aaronportnoy.bsky.social Hacker-in-Residence @ Dartmouth College; Program Director, Applied Research @ IBM
David Litchfield @litchfield.bsky.social Dad, Powerlifter, Security at Apple, Photographer- M Peiter “Mudge” Zatko @mudge.bsky.social DARPA/Google/Stripe/L0pht/Twitter/…/DARPA/[redacted]
https://en.wikipedia.org/wiki/Peiter_Zatko
Niklas B @niklasb.rce.associates research @ dfsec.com
goggan @goggan.bsky.social
lowkey @lokifer.nz loki/adam
pākehā, computer security nerd
I help run Wellington ISIG and kawaiicon
collector of pvc discs with heavy music inscribed
he/him
Damien Miller @damienmiller.bsky.social debugging, v: the process of inserting printf statements into code until one's errors reveal themselves
Justin Steven @justinsteven.com
richo butts @richo.psych0tik.net Rally cars, parachutes, airplanes. Neat times with my friends.
Darren @darrenpauli.bsky.social Ex infosec hack ‘06-‘17 @ TheRegister, SCMagazine, ZDNet, ComputerWorld. Now I write about writing and help regular folk understand infosec.
Lukasz Gogolkiewicz @synick.bsky.social cyber guy, advocate for diversity in tech, mentor, adventurer, and woodworker...
@cyanasty.bsky.social @cyanasty.bsky.social
@sochumpy.bsky.social @sochumpy.bsky.social
Gynvael Coldwind @gynvael.bsky.social Security researcher/programmer ⁂ Managing director @ HexArcana ⁂ @DragonSectorCTF founder ⁂ he/him
James Forshaw @tiraniddo.dev Security researcher in Google Project Zero. Author of Attacking Network Protocols. Posts are my own etc.
Maddie Stone @maddiestone.bsky.social Security Researcher at Google Project Zero. 0-days all day. Love all things reverse engineering. she/her
the grugq @thegrugq.bsky.social
Shane Huntley @shanehuntley.bsky.social Aussie security / tech guy.
Google Threat Intelligence. Co-founder Threat Analysis Group (TAG). Tweets are my own not my employers.
Hexacon @hexacon.bsky.social Offensive security conference in the heart of Paris. 10-11th October 2025
https://www.hexacon.fr/
jduck @jduck.me Continuously learning about computer security through research and development.
Samuel Groß @saelo.bsky.social Working on Project Zero, Big Sleep, and V8 Security. Personal account.
Kylie McDevitt @kyliemcdevitt.bsky.social Cofounder & CEO @infosectcbr.bsky.social | Organiser @bsidescbr.bsky.social
shubs @shubs.io Co-founder, security researcher. Building an attack surface management platform, @assetnote.io
Adrian Herrera @adrianherrera.bsky.social Security researcher with an interest in formal methods.
B̶u̶i̶l̶d̶i̶n̶g̶ breaking things @ Interrupt Labs |
Teaching @ Australian National University
https://adrian-herrera.com
OffensiveCon @offensivecon.bsky.social OffensiveCon is a highly technical international security conference focused on offensive security only. Organized by Binary Gecko GmbH.
Ollie Whitehouse @ollieatnowhere.bsky.social CTO at the UK's National Cyber Security Center
SinSinology @sinsinology.bsky.social Pwn2Own 20{22,23,24,24.5}, i look for 0-Days but i find N-Days & i chase oranges 🍊
https://summoning.team/
Stephen Fewer @stephenfewer.bsky.social Senior Principal Security Researcher at @rapid7.com. Specializing in software vulnerabilities and exploitation. stephenfewer.github.io
Alex Matrosov @matrosov.bsky.social
Ivanlef0u @ivanlef0u.bsky.social ivanlef0u.fr
ϻг_ϻε @steven.srcincite.io Hermetic Initiate. Exploring conscience and the nature of reality. I also hack things.
Brad Spengler @spender.bsky.social President of @opensrcsec, developer of @grsecurity
Personal account
Joanna Rutkowska @rootkovska.bsky.social https://tracesofhumanity.org
Previously: Golem Foundation/Wildland, Qubes OS, hardware/virtualization/OS security research.