TrendAI Zero Day Initiative @thezdi.bsky.social TrendAI Zero Day Initiative™ (ZDI) is a program designed to reward security researchers for responsibly disclosing vulnerabilities.
Katie Paxton-Fear @insider.phd Dr, apparently. Security Adovcate @semgrep & Hacker. #BugBounty hunter & #infosec YouTuber. APIs & Interlinked OffSec, PhD in AI+Sec @hacknotcrime. she/her
DEF CON @defcon.bsky.social The world’s premier hacker conference. Serving the global hacker community since 1993.
Defcon.org
Forum.defcon.org
Defcon.social
Eric Geller @ericjgeller.com Senior reporter at @CybersecurityDive.bsky.social covering all things digital security. I also co-host @hothtakes.bsky.social. | Send me tips: https://ericjgeller.com/contact.html
hrbrmstr 🇺🇦 🇬🇱 🇨🇦🇧🇪 @hrbrmstr.mastodon.social.ap.brid.gy Pampa • Don't look @ me…I do what he does—just slower. #rstats avuncular • 👨🍳 • ✝️ • 💤 • Distinguished Engineer @ Censys • Carnegie Mellon lecturer […]
🌉 bridged from ⁂ https://mastodon.social/@hrbrmstr, follow @ap.brid.gy to interact
hakan @hatr.bsky.social reporter covering cyber (both crime and state-sponsored) for Der Spiegel and ZDF, short overview at https://linktr.ee/hakantanriverdi, Signal: hakan.25
Jeremy Kirk @jkirk.bsky.social Okta Threat Intelligence. Personal account. Interests: Cyber threat intelligence, OSINT, data breaches, AI. Formerly intel analysis @ Intel 471. jeremykirk.com
Andrew Couts @couts.bsky.social Security & Investigations Director at @WIRED.com. Send tips and/or dog pics.
Signal: couts.01
Meredith Whittaker @meredithmeredith.bsky.social President of Signal, Chief Advisor to AI Now Institute 
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
Sysinternals @sysinternals.com Created by Mark Russinovich and Bryce Cogswell and later acquired by Microsoft, Sysinternals utilities help you troubleshoot and manage your Windows systems.
Lorenzo Franceschi-Bicchierai @lorenzofb.bsky.social Real-time historian of the late cyber capitalist era @TechCrunch, writing about the intersection of hackers, human rights, and spies.
Also writing a book about Hacking Team and the history of government spyware.
☎️ Signal: +1 917 257 1382
Deth Veggie @dethveggie.bsky.social Herr Doktor Professor Deth Vegetable -- CULT OF THE DEAD COW -- .ooM
Hacker / Archaeologist / Gadabout / Professional Something-or-Other. Anti-fascist and Pro-science. As the old axiom says, reality has a liberal bias.
Nazis need to be punched.
Rot26 🇺🇸🤝🇺🇦 @rot26.wtf Infosec. Professor. Studies Conflict, Cyber, and Influence Operations. Also, Emergency Management, Community Resilience and Weather. Optimist. Christian, but not a jerk about it. Fella from way back. Tries to be a helper. He/Him
B:\a.zza @mcbazza.com I.T. geek. Does things with computers/tech.
All views are own. Don't take seriously. Or, should you?
Servant to 5x cats. He/him
You may know me as 'mcbazza' on the bird-site
Chris Plummer @chrisplummer.bsky.social Senior Cybersecurity Architect @ popular ivy league academic health system
Saved Gmail ✉️
Kenpo 2nd Black 🥋
https://www.wmur.com/article/nh-cybersecurity-expert-gmail-feature-is-being-hacked-by-scammers/44083493
Stuart @cyberstark.bsky.social UK Cyber Security Professional and Ipswich Town fan
Beth Maundrill @gunshipgirl.bsky.social Editor at Infosecurity Magazine 👩💻
B2B journalist/editor for over a decade, started off in defence and now covering cybersecurity.
The Guardian @theguardian.com The need for independent journalism has never been greater. Become a Guardian supporter https://support.theguardian.com
🇺🇸 Guardian US https://bsky.app/profile/us.theguardian.com
🇦🇺 Guardian Australia https://bsky.app/profile/australia.theguardian.com
Andy H 🇬🇧🇺🇦💜 @wh-y.bsky.social Andy’s the name, IT Security is the game.
Experience in all kinds of tech stuff - spanning many years. opinions=own
Human (but don’t hold that against me)
Zack Whittaker @zackwhittaker.com Security editor, TechCrunch
Signal: zackwhittaker.1337
My stories: techcrunch.com/author/zack-whittaker
My newsletter/blog: this.weekinsecurity.com
DilDog 🅅 @dildog.l0pht.com Tech Dysangelist
cDc/hack.xxx/Veilid
Support Veilid! Badge: 🅅 www.veilid.com
Merch at: @hack.xxx
he/him/"hey buddy"
SteelCon @steelcon.info SteelCon is a family friendly hacker conference in Sheffield.
Next event is July 2026.
Barry Dorrans @blowdart.me Security Curmudgeon for Microsoft .NET
Do you really think work wants my social media opinions?
Not nice, but kind - @medus4.com
🇮🇪 🇬🇧 🇺🇸 
Alexander Martin @alexmartin.bsky.social Journalist covering cybersecurity and intelligence. UK Editor at The Record from Recorded Future News. Dad of two.
🏠 Sheffield
📧 alexander.martin@therecord.media
📱 Signal: AlexanderMartin.79
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.
Sean Gallagher @thepacketrat.net Birb stalker. Cat tree. Cyber Threat Researcher. Recovering cyber and natsec reporter. Meme war and US Navy veteran.
@thepacketrat everywhere since 1994. These posts are not my employers’. https://falling-anvil.com
Pwnallthethings @pwnallthethings.bsky.social Just thinking out loud.
Robin @digi.ninja Hacker, coder, climber, runner, triathlete.
Always learning.
Co-flounder of SteelCon
Glenn Pegden @glenn.pegden.com Good Guy Hacker, Dad, App Sec / Vuln Man / Pentest specialist and leader, conference organiser, volunteer, speaker and attendee, retro gamer, Blackburn Rovers and Leeds Knight fan ….. hacker
http://Glenn.pegden.com/findmeon
Catalin Cimpanu @campuscodi.risky.biz ☆ Cybersecurity reporter
★ Newsletters at Risky Business
#infosec #cybersecurity
https://risky.biz
The Register @theregister.com Your favorite enterprise technology news vultures, flying high in the Bluesky – On the web since 1998 – More here: https://www.theregister.com/
Jason Koebler @jasonkoebler.bsky.social Journalist @404Media.co
Signal: jason.404 // email: jason@404media.co
Daniel Gordon @validhorizon.bsky.social Thought Trailer, Cyber Threat Intel, DFIR. He/Him. Bucketing, sharing, and bacon-saving as a service. https://validhorizon.medium.com/
Lisa Forte @lisaforte.bsky.social Cyber security, climbing, caving and diving! 💜
ProfDanny @profdanny.bsky.social Technology and risk delivering information security: Professor, PhD, FCIISec, cyber researcher, analyst, consultant, practitioner, father, grandfather.
Joe Tidy BBC News @joetidy.bsky.social Cyber Correspondent, BBC News. Author of Ctrl+Alt+Chaos. I cover cyber security, online safety, crypto, AI, social networks and everything 💻📱📡. Global news mainly. DMs always open for tips/ feedback.
Lukasz Olejnik @lukaszolejnik.bsky.social Security & Privacy. Data Protection. Research & Development. Engineering. Analyst. Policy. W3C. Consultant. Author. King’s College London/War Studies. me@lukaszolejnik.com
lukaszolejnik.com/books
blog.lukaszolejnik.com
techletters.substack.com
Quentyn @quentyn.bsky.social the artist formally known as Quentynblog on twitter - i do infosec, running and outdoors things. Not verified so don't message me here as i cant read them at all
Gary Hawkins @garyhawkins.net Mostly memes and shitposting, with maybe the occasional smidge of the cybers.
ISRS | Institute for Strategic Risk and Security @isrs.ngo ISRS is a Geneva-based NGO addressing the world’s hardest security challenges through field-driven research, implementation-focused strategy, and hands-on partnership.
BSides London @bsideslondon.bsky.social 📅 13 Dec 2025 | 📍 Novotel London West
Grassroots-driven security conference.
Built by the local InfoSec community, for the community.
Web: https://BSides.London
X/Twitter: https://x.com/BSidesLondon
#BSidesLDN2025
UK_Daniel_Card @mrr3b00t.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.
Marques Brownlee @mkbhd.com Video maker
Tim Berners-Lee @timbl.bsky.social Inventor of WWW
Co-founder & CTO Inrupt.com | Lead, Solidproject.org
Co-founder WebFoundation.org & theODI.org
Founder w3.org
My memoir ‘This is for Everyone’ https://thisisforeveryone.timbl.com/
Follow me on Mastodon https://w3c.social/@timbl
Electronic Frontier Foundation @eff.org We're the Electronic Frontier Foundation. We're a nonprofit that fights for your privacy and free speech online. Find all of EFF's social media accounts at eff.org/social.
Joseph Cox @josephcox.bsky.social Hacking/crime/privacy journalist. Author of DARK WIRE, buy here: https://www.hachettebookgroup.com/titles/joseph-cox/dark-wire/9781541702691/#preorder Co-founder of 404 Media. Signal: joseph.404 Email: joseph@404media.co
Alex Hern @hern.bsky.social AI correspondent at the Economist. I write about it, that is. I’m still human. One of literally dozens of people online who is not American.
Hannah Murphy @mshannahmurphy.bsky.social Financial Times tech correspondent writing on social media - X, Meta, TikTok, Telegram - plus some AI, cyber and misinformation.
🇬🇧 in 🇺🇸. DMs open.
Tips to: 📨hannah.murphy@ft.com
Signal: mshannahmurphy.04
P(aul) Frazee @pfrazee.com CTO at Bluesky. Not a nerd.
SwiftOnSecurity @swiftonsecurity.com computer security person. former helpdesk
RansomLook @ransomlook.bsky.social Yet an other Ransomware gang tracker - Opensource project: https://github.com/RansomLook/RansomLook - Website: https://www.ransomlook.io
GitHub @github.com The AI-powered developer platform to build, scale, and deliver secure software.
Nicolas Krassas @dinosn.bsky.social Head of Threat & Vulnerability Mgmt @ Henkel AG & Co. KGaA
https://t.co/NC1orlKrW3
Also at : @dinosn
Robert Graham @erratarob.bsky.social @erratarob on the hellscape site
Bluesky @bsky.app official Bluesky account (check username👆)
Bugs, feature requests, feedback: support@bsky.app