The Citizen Lab @citizenlab.ca We are an academic research unit at the University of Toronto investigating novel threats to democracy, human rights, and global security in the digital ecosystem.
DFRLab @dfrlab.bsky.social The Atlantic Council's Digital Forensic Research Lab. Cultivating a global network of digital forensic analysts (#DigitalSherlocks) to combat disinformation.
Bartek Jerzman @handle.invalid Hunting ghosts in wires and boxes, Head of CTI, former NCSC-PL, PL Navy #fightingthreats | @PIVOTcon.bsky.social co-founder & Chief Meme Officer
Sergio Caltagirone @intel.bsky.social Georgia Tech Professor. Cyber threat intelligence and cybersecurity professional - former NSA, Microsoft, and Dragos. President of the Threat Intelligence Academy. #FSD 🦆 Formerly @cnoanalysis on Twitter
Alex Perez Palma (APP) @app-01.bsky.social CTI @ Workday, CTM-CMM Co-Author, former Sec Researcher @ Cisco Talos, Booz Allen Hamilton, Speaker, Leader
BleepingComputer @bleepingcomputer.com Breaking cybersecurity and technology news, guides, and tutorials that help you get the most from your computer. DMs are open, so send us those tips!
Jaime Blasco @jaimeblascob.bsky.social Cofounder and CTO at Nudge Security. Ex-AlienVault. Talking about AI, Threat Intel, SaaS security
The Intercept @theintercept.com Fearless, adversarial journalism. Join our newsletter to get our best investigative reporting delivered to you: https://theintercept.com/newsletter/
ICIJ @icij.org Stories that rock the world. We expose wrongdoing so the world can make it right. Find us at ICIJ.org. #UberFiles #EricssonList #PandoraPapers #FinCENFiles #PanamaPapers
Ron Deibert @rondeibert.bsky.social Director of The Citizen Lab at the University of Toronto's Munk School of Global Affairs & Public Policy
Author of Chasing Shadows https://chasingshadowsbook.ca/ 
Allan “Ransomware Sommelier” Liska @ransomwaresommelier.com Recorded Future - Ransomware Researcher
Owner @greenarcher.io - Yours Truly, Johnny Dollar | The Press Guardian | The Clock | The Green Archer
Weird mix of security, comics, photography and wine!
www.greenarcher.io
Team Cymru - S2 Threat Research @teamcymrus2.bsky.social Follow us for the latest blogs and IOCs from Team Cymru's S2 Threat Research team.
Dutch_OsintGuy @dutchosintguy.bsky.social Dutch guy with Open Source Intelligence & Analysis skills • OSINT • Certified Instructor @SANSInstitute • SVP of Engineering& Chief Innovator @ shadowdragon.io
Sector035 @sector035.bsky.social Doing #OSINT before it was cool 😎 Just arrived, slowly settling on here.
Christina Lekati @christinalekati.bsky.social #SocialEngineering, #Psychology, #HUMINT & #OSINT intertwined for the sake of security.
WhatsMyName Project @whatsmyna.me Official Bsky account for the http://github.com/WebBreacher/WhatsMyName GitHub #OSINT username enumeration tool.
Layer 8 Conference and Podcast @layer8conference.com June 14th, Boston
5th Layer 8 Conference
#OSINT #SocialEngineering
https://layer8conference.com 
Signal @signal.org Signal is a nonprofit end-to-end encrypted communications app. Privacy isn’t an optional mode, it’s the way Signal works. Every message, every call, every time. https://signal.org/donate/
Alex Stamos @stamos.org CPO/CSO of Corridor.dev, teaching at Stanford.
Lenny Zeltser @lennyzeltser.com Builder of security products and programs. Teacher of those who run them.
https://zeltser.com
Silas Cutler @silascutler.bsky.social You may know me from your server logs.
#Malware, Hacks, Internet Scanning, #CTI
Marcus Hutchins @malwaretech.com threads.com/@malwaretech
https://linkedin.com/in/malwaretech
https://marcushutchins.com
Joseph Menn @joemenn.bsky.social Washington Post alum covering hacking, disinformation and what’s left of privacy. Author of books on the Cult of the Dead Cow, organized criminal hacking, and Napster. Pulitzer co-finalist 2024. Signal joemenn.01
Marc Rogers @cjunky.bsky.social Ramblings of a Mad Englishman: Hacker @ BBC's Real Hustle & Mr Robot. Head of Sec @ DEF CON. Founder @ CTI-League, Ransomware Taskforce, w00w00, CDC NSF, (He/Him).
Also
Twitter @marcwrogers
Mastodon cj@chaos.social
Sekoia @sekoia.com Sekoia is the European cybersecurity company building the Cyber Operations Platform for the AI era.
Eric Hutchins @ehutchins.bsky.social Started in infosec, co-authored the kill chain paper, dabbled in countering influence operations at Meta, and now back to infosec. Lover of command line, python, and rust.
Dan Goodin @dangoodin.bsky.social Cybersecurity Reporter, Ars Technica: https://arstechnica.com/author/dan-goodin/ Hungry for tips. Text me on Signal: DanArs.82. "The world isn’t run by weapons anymore, or energy, or money. It’s run by little 1s and 0s, little bits of data."
Andy Greenberg @agreenberg.bsky.social Writer for WIRED. Author of SANDWORM. Latest book, TRACERS IN THE DARK: The Global Hunt for the Crime Lords of Cryptocurrency, out now. agreenberg@wired.com. Andy.01 on Signal.
Patrick Gray @patrick.risky.biz https://risky.biz/
Matthew Green @matthewdgreen.bsky.social I teach cryptography at Johns Hopkins. https://blog.cryptographyengineering.com
@mikko @mikko.bsky.social Fighting malicious use of technology.
MITRE ATT&CK @attack.mitre.org MITRE ATT&CK® - A knowledge base for describing the behavior of adversaries. Replying/Following/Reposting ≠ endorsement.
Hackers On Planet Earth 🏳️🌈🏳️⚧️ @hope.net HOPE Conference
The New Yorker Hotel
August 14-16, 2026
NY, NY
https://hope.net
Cynthia Brumfield @metacurity.com DC resident and cybersecurity writer, analyst, book author, publisher. https://metacurity.com/ https://cyberriskbook.com/
https://www.csoonline.com/profile/cynthia-brumfield/ https://infosec.exchange/@metacurity
Send tips to Cynthia.507 via Signal.
Matt Burgess (WIRED) @mattburgess1.bsky.social Security writer @wired.com
Cybercrime, privacy, surveillance, and more.
Signal: mattburgess.20 | Email: matt_burgess@wired.com
GreyNoise @greynoise.io GreyNoise analyzes Internet background noise. Use GreyNoise to remove pointless security alerts, find compromised devices, or identify emerging threats.
Alex Pinto @alexcp.bsky.social Cybersecurity data storytelling. DBIR at Verizon Business. Previously serial founder and parallel shitposter. He/him.
Matt Devost @devost.net Technologist, entrepreneur, and hacker | CEO @ OODA | Founder @DevSec | Past Founder of FusionX & Terrorism Research Center. Black Hat board member. 
Eliot Higgins @eliothiggins.bsky.social Founder and creative director of Bellingcat and director of Bellingcat Productions BV. Author of We Are Bellingcat.
Epieos @epieos.com Premium OSINT Solution, Exclusive Intelligence.
Uncover the identity and activity behind an email address or phone number.
contact@epieos.com
Alexandre Borges @alexandreborges.bsky.social Vulnerability Researcher | Exploit Developer (speaker 3x at DEF CON)
Tib3rius @tib3rius.bsky.social Web App (mostly) Hacker | Cybersecurity Educator | Content Creator | Ex-Brit | Links: http://linktr.ee/tib3rius (he/him) 🇺🇸 A mostly unserious person. @therealc3rul34n.bsky.social is bae 🥰
Hackmanac @hackmanac.com We track verified, real-world cyber attacks to help you develop effective Cybersecurity strategies. Try HackRisk.io, your Strategic Threat Intelligence platform.
🌐 hackmanac.com
🌐 hackrisk.io
Carlos Afonso Silva @carlosafonso.bsky.social ᴅᴇʟᴇɢᴀᴅᴏ | ᴘᴏʟíᴄɪᴀ ᴄɪᴠɪʟ ꜱᴘ
Pensador, Palestrante e Professor Universitário.
The Cyber (in)Security Hub @cybersecurity.bsky.social Former NSA hacker; Cyber Expert; Current CISO, TV Cyber Expert & Keynote Speaker
Twitch.tv/cyber_insecurity
topmate.io/neal_bridges
https://linktr.ee/cyber_insecurity
#cybersecurity #redteam #hacking #blueteam #securityoperations #ciso
Bluesky Safety @safety.bsky.app Sharing updates about trust and safety on Bluesky.
This account’s mentions are not actively monitored. To report a post or account, use the in-app reporting feature.
Community Guidelines: https://bsky.social/about/support/community-guidelines
SANS.edu Internet Storm Center @sansisc.bsky.social http://isc.sans.edu - Global Network Security Information Sharing Community - Daily blogs and cyber security news podcast.
Carlos Cabral @cabral.bsky.social Batuqueiro. Podcaster. Inconformado.
https://podcasters.spotify.com/pod/show/cyber-morning-call
visi stark @invisig0th.bsky.social Founder of The Vertex Project (@vtxproject)
Father of the #APT1 Report @Mandiant.
Inventor of #synapse, #vivisect, UNCs, imphash, ...
DEFCON CTF Champion, Founder of Kenshoto
Cyber Threat Alliance @cyberalliance.bsky.social CTA is a group of cybersecurity practitioners who work together to improve the overall security of the global digital ecosystem. We are stronger together. www.cyberthreatalliance.org
HD Moore @hdm.io runZero & Metasploit
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
Katie Nickels @likethecoins.bsky.social 
SLEUTHCON @sleuthcon.bsky.social Tickets for 2026 are now available!
https://www.sleuthcon.com
Cedric Pernet @cedricpernet.bsky.social Senior Threat Researcher @ Proofpoint.
Cybercrime / Cyberespionage aficionado.
Has worked in several CSIRTs/CERTs.
Metal & Rock dude, never enough guitars.
Motorcycles fan.
Wrote a book in French language on cyberespionage.
Ex-Law Enforcement Officer
Greg Lesnewich @greg-l.bsky.social oh great, now I’m on bluesky 
ThreatInsight @threatinsight.proofpoint.com Proofpoint's insights on targeted attacks and the cybersecurity threat landscape.
Proofpoint @proofpoint.com The official account of Proofpoint, a leader in human-centric cybersecurity.
Protect people. Defend data. Mitigate human risk.
DistrictCon @districtcon.bsky.social A new DC hacker conference: Bringing together builders, breakers, and fixers to do cool shit.
Feb. 6-7, 2027
districtcon.org
Winnona @winnona.bsky.social @DistrictCon Founder. Hacker and attorney. @CyberStatecraft / @BelferCenter fellow, ex-Google threat research. Dog mom. Opinions=my own 👩🏻💻
Julian Wolf @julupu.bsky.social Threat research, running, and other things
Richard Bejtlich @taosecurity.bsky.social Former USAF intel officer. Early info war practitioner. Created GE-CIRT. Mandiant's first CISO. #NetworkSecurityMonitoring for @corelight-inc. Author. Latest books #ad amzn.to/3B2AcMc
Ryan Naraine @ryanaraine.bsky.social Three Buddy Problem
https://securityconversations.com
My OSINT Training (MOT) @myosint.training Official BlueSky account for the myosint.training site.
Your home for OSINT learning.
Cris Brafman Kittner @criskittner.bsky.social military strategy, geopolitical analysis, CTI, avid photographer
Núcleo Jornalismo @nucleo.jor.br O Núcleo é uma organização de jornalismo e comunidade que cobre o impacto da tecnologia e da inteligência artificial na vida das pessoas.
🔗 https://nucleo.jor.br/
Tyler Fisher @tylerjfisher.com Founder, @euphonos.studio. Stop doomscrolling with @sill.social. Watch good NBA games with heatcheck.site. Used to work for a bunch of news orgs.
Lapsed Philadelphian in 🇳🇱.
Sam Sabin @samsabin.bsky.social Axios cybersecurity reporter, taking it day by day ✨ | 📩: sam.sabin@axios dot com, signal: SamSabin.01 (no pitches!), she/her
Valdemar Balle @valdemarballe.bsky.social Dedicated to OSINT, SOCMINT & vHUMINT | MSc Data Science Stud. | BSc Sociologist | Founder of Darksight Analytics | Co-founder of OSINord | Paliscope Ambassador | OSINT Blogger
Selena Larson @selenalarson.bsky.social loves dogs, sports, memes. she/her. podcaster. "bluesky's humblest resident nailfluencer 💅" - Jerry
my heart is in the west 🌵🌊 views mine.
Micah @webbreacher.com Maker of WhatsMyName OSINT tool | Co-owner @ myosint.training | Finder of things and knower of secrets (IYKYK) | Always #OSINTCurious
Allison Nixon @nixonnixoff.bsky.social Chief Research Officer @ Unit 221B
most reliable way to reach me is my company's outreach form on the website
my other urls:
https://infosec.exchange/@nixonnixoff
https://www.linkedin.com/in/allison-nixon-81822124/
don't bother contacting me on twitter
The Vertex Project @vertexproject.bsky.social We create technology for analytical teams to provide intelligence-driven insights to decision makers.
For more info, visit https://vertex.link!
Kevin Collier @kevincollier.bsky.social I cover digital threats for NBC News. Tip me! @kevincollier.01 on signal, kevin.collier@nbcuni.com. NYC, from West Virginia.
CYBERWARCON @cyberwarcon.bsky.social CYBERWARCON is a one-day conference in Arlington, VA focused on the specter of destruction, disruption, and malicious influence on our society through cyber capabilities.
cyberwarcon.com
Nicolas Caproni @caproni.fr Head of Sekoia Threat Detection & Research (TDR) team • Cyber Threat Intelligence • Detection Engineering • SOC Platform 🇫🇷 🇪🇺 • Hip-Hop • Basketball 
Pasquale Stirparo 🇺🇦 🇪🇺 @pstirparo.bsky.social Founder @ RationalEdge
#ThreatIntel #ICS #DFIR; ''Learning iOS Forensics'' author;
#BSidesZH #PIVOTcon org.
@pivotcon.bsky.social
https://pstirparo.ch
https://rationaledge.io
Related interests/obsessions:
#ThreatHunting #CTI #YARA #CriticalThinking #Books
J. A. Guerrero-Saade (JAGS) @jags.bsky.social VP of Intelligence and Security Research, Senior Technical Fellow (AI) @ SentinelOne.
Distinguished Fellow and Adj Professor @ Hopkins SAIS Alperovitch Institute. Three Buddy Problem Co-Host. LABScon Founder, Cyber Paleontologist, Fourth-Party Collector.
Virtual Routes @virtualroutes.bsky.social Virtual Routes tackles the impact of digital and emerging technologies on global affairs. Also check out @bindinghook.bsky.social, our media outlet.
Max Smeets @maxwsmeets.bsky.social Author of No Shortcuts & Ransom War
Co-director Virtual Routes (https://virtual-routes.org/), previously ECCRI
Managing Editor Binding Hook (https://bindinghook.com)
Senior Researcher, ETH Zurich
PIVOTcon @pivotcon.bsky.social Threat Research Conference in Malaga, Spain, 6-8 May 2026
#StayTuned #ComingSoon #PIVOTcon #PIVOTcon26
https://pivotcon.org
jiska @naehrdine.bsky.social ɿɘɘniϱnɘ ɘƨɿɘvɘɿ
🎦 youtube.com/@jiskac
📝 naehrdine.blogspot.com
🐥 twitter.com/naehrdine
🎓 hpi.de/classen
📱 reversing.training
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
John Hultquist @hultquist.bsky.social Mandiant Intelligence at Google. CYBERWARCON and SLEUTHCON founder. Johns Hopkins professor. Army vet.
Bluesky @bsky.app official Bluesky account (check username👆)
Bugs, feature requests, feedback: support@bsky.app
Graham Cluley @grahamcluley.com Award-winning #cybersecurity keynote speaker, writer, podcaster | Host of multi-award-winning @smashingsecurity.com podcast.
❤️ #DoctorWho, #Beatles, #Chess
He/him
🌐 https://grahamcluley.com
🎙️ https://www.smashingsecurity.com
Catalin Cimpanu @campuscodi.risky.biz ☆ Cybersecurity reporter
★ Newsletters at Risky Business
#infosec #cybersecurity
https://risky.biz
The Shadowserver Foundation @shadowserver.bsky.social Our mission is to make the Internet more secure by bringing to light vulnerabilities, malicious activity and emerging threats. Join our Alliance!
https://shadowserver.org/partner
Intel 471 @intel471.bsky.social Intel 471 specializes in delivering intelligence related to threat actors, threat hunting, financial cybercrime, ransomware, vulnerabilities, malware and underground marketplaces. Listen to our podcast, Cybercrime Exposed, on Spotify and Apple. #infosec
Jack Rhysider @jackrhysider.bsky.social Creator of Darknet Diaries.
Verification: https://twitter.com/JackRhysider/status/1675298532406984707
Curated Intel @curatedintel.bsky.social Bringing together intelligence researchers and incident responders. #TrackThePlanet 🌍 curatedintel.org
🎸Paul🎹 @paul.bsky.social Network security, Audio production w/ Bitwig & Logic Pro, analog synths, guitars, and Metroidvanias.
🇺🇸/🇲🇽
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
the grugq @thegrugq.bsky.social 
CyberScoop @cyberscoop.bsky.social We report on news and events impacting technology and security. https://linkin.bio/cyberscoop/
Costin G. Raiu @craiu.bsky.social Romanian antihacker from another planet. #threatintel #yara #chess #taekwondo black belt
Motto: "One reboot a day keeps the implant away"
Joe Stewart @joestewart.bsky.social Principal Security Researcher at eSentire
Aric Toler @aric.bsky.social Visual Investigations at The New York Times