Mark Cuban @mcuban.bsky.social Entrepreneur
Costplusdrugs.com
Ervin Szilagyi @ervinszilagyi.dev 💻Software Engineer at Microsoft
☁️AWS Community Builder
🎖️8xAWS Certified
✒️Sometimes I write about clouds on http://ervinszilagyi.dev and on http://dev.to/ervin_szilagyi
Patrick Howell O’Neill @patrickhowelloneill.com Journalist at Bloomberg News in DC. Signal: @howelloneill.01, email: patoneill1@bloomberg.net https://www.bloomberg.com/authors/AXb8dLPHBFc/patrick-howell-oneill
Pwnallthethings @pwnallthethings.bsky.social Just thinking out loud.
SwiftOnSecurity @swiftonsecurity.com computer security person. former helpdesk
Meredith Whittaker @meredithmeredith.bsky.social President of Signal, Chief Advisor to AI Now Institute 
David Buchanan @retr0.id reverse engineering, cryptography, exploits, hardware, file formats, and generally giving computers a hard time
Fedi: @retr0id@retr0.id
Macroblog: https://www.da.vidbuchanan.co.uk/blog/
Katie Moussouris (she/her/she-hulk/she-ra)🌻 @k8em0.bsky.social Founder & CEO LutaSecurity @payequitynow MIT&Harvard visiting scholar, @MasonNatSec fellow, 1/2 Chamoru, 1/2 Greek all-American hacker
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.
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
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
Marcus Hutchins @malwaretech.com threads.com/@malwaretech
https://linkedin.com/in/malwaretech
https://marcushutchins.com
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
Kevin Beaumont @doublepulsar.com cybersecurity weather man. scanning the horizons for cloudy cyber. Expert at nothing except computer rubbish. Anti-ransomware since 2015.
Runa Sandvik @runasand.bsky.social Founder of Granitt, securing journalists and at-risk people around the world. 
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
Alex Stamos @stamos.org CPO/CSO of Corridor.dev, teaching at Stanford.
Matthew Green @matthewdgreen.bsky.social I teach cryptography at Johns Hopkins. https://blog.cryptographyengineering.com
Lesley Carhart @hacks4pancakes.com I am eminently qualified to speak from experience about a variety of dumpster fires.
ICS DFIR at Dragos, martial artist, marksman, humanist, level 14 Neutral Good rogue, USAF retired. I post *very serious* things about infosec. Thoughts my own. Enby. 🏳️🌈
Dustin Volz @dustinvolz.bsky.social Washington correspondent for The New York Times focused on cyber conflict, digital espionage and intelligence. Prior stops at WSJ, Reuters, National Journal. https://www.nytimes.com/by/dustin-volz
Azeria @azeria-labs.com Founder of Azeria Labs, Trainer, Author of Blue Fox: Arm Assembly Internals & Reverse Engineering
John Hultquist @hultquist.bsky.social Mandiant Intelligence at Google. CYBERWARCON and SLEUTHCON founder. Johns Hopkins professor. Army vet.
@mikko @mikko.bsky.social Fighting malicious use of technology.
Rob Joyce @rgblights.bsky.social Cyber guy. Former NSA cybersecurity director and chief of TAO. Lover of memes. Warning - occasional outrageous Christmas light content.
Zack Whittaker @zackwhittaker.com Security editor, TechCrunch
Signal: zackwhittaker.1337
My stories: techcrunch.com/author/zack-whittaker
My newsletter/blog: this.weekinsecurity.com
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
Ellen Nakashima @ellenwapo.bsky.social Intelligence and national security reporter at The Washington Post. Reach me securely on Signal at Ellen.626.
Patrick Gray @patrick.risky.biz https://risky.biz/
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.
Mark Dowd @mdowd.bsky.social Internet hacker
Chris Bing @chrisbing.bsky.social Cyber, natsec and foreign affairs. Formers with ProPublica, Reuters and CyberScoop
https://bing-chris.medium.com/how-to-contact-me-d2fd4bd3ed7b
Jason Kikta @kikta.net // Making it up as I go
// JHU SAIS @alperovitch.institute adjunct
// @istorg.bsky.social adjunct sr tech advisor
// Former USCYBERCOM/CNMF
// Retired US Marine Corps
// Personal views and invective
Bill Marczak @billmarczak.org senior researcher at @citizenlab.ca
chompie @chompie.rip hacker, poster, weird machine mechanic
https://chompie.rip
Catalin Cimpanu @campuscodi.risky.biz ☆ Cybersecurity reporter
★ Newsletters at Risky Business
#infosec #cybersecurity
https://risky.biz
Joe Slowik @pylos.co Threat Intel / CTI / OT / ICS / Critical Infra stuff along with other things. I genuinely care, and wish others did too.
Website: pylos.co
Training/Consulting: paralus.co
Horkos @wylienewmark.bsky.social waking up everyday in a full sprint. cyber(punk) & counterintelligence. bloody inertia interspersed with bouts of bloody frenzy. i see kanly today in everything.
#FUZZYSNUGGLYDUCK
opinions are my own.
Łukasz @maldr0id.bsky.social Military-grade reverse engineer @ Google, working on Android malware
Got mistaken for a member of Project Zero once.
Everything here is my own opinion
he/him ✨🌈🦄
gab 🇺🇦🇵🇸 @handle.invalid fka @gabbyroncone on twitter. mission tech lead for RU & Eastern European APT ops @Google. views expressed here are mine, not my employer’s. she/her.
Tom Uren @tom.risky.biz Author of the Seriously Risky Business cyber security newsletter
Greg Otto @gregotto.bsky.social @gregotto from twitter, now on bluesky. Editor-in-Chief at CyberScoop. Host of Safe Mode. Better with words than I am with code.
MITRE ATT&CK @attack.mitre.org MITRE ATT&CK® - A knowledge base for describing the behavior of adversaries. Replying/Following/Reposting ≠ endorsement.
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.
evacide @evacide.bsky.social Director of Cybersecurity @eff.org
Co-founder of @stopstalkerware.bsky.social
These opinions are my own, not my employer's
I did a TED talk once
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
Ian Coldwater 🧊🚫 @lookitup.baby Kubernetes SIG Security Co-Chair, goose in the mainframe. Minneapolis. They/them. Stay punk 🏴
MSP feed info: https://bsky.app/profile/amityf.bsky.social/post/3mrv36uo4pc2a
Hackers On Planet Earth 🏳️🌈🏳️⚧️ @hope.net HOPE Conference
The New Yorker Hotel
August 14-16, 2026
NY, NY
https://hope.net
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
Lea Kissner @leak.bsky.social Security, privacy, respect. Was the Twitter CISO until it was terrible. Now LinkedIn CISO. they/them
Alex Ionescu @ionescu.bsky.social Windows Internals Author, Developer, Reverse Engineer, Security Researcher, Speaker, Trainer, and most recently Nation State Hacker.
Core OS Platform Developer at Apple, Hyper-V Vendor at Microsoft, Chief Architect at CrowdStrike and now Director at CSE.
Whitney Merrill @wbm312.bsky.social I nudge people to care about privacy and security. CPO/DPO. Privacy/infosec lawyer. Hacker. Fighting for privacy, digital civil liberties & the users. Ex @EA @FTC |my views are my own. I used to post on Twitter at @wbm312.
Danny Moore @moore.bsky.social Cyber-warfare | PhD from KCL | Author of 'Offensive Cyber Operations' | Security @ Meta 
Alec Muffett @alecmuffett.bsky.social everybody deserves good security.
https://alecmuffett.com/about
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."
Lily Hay Newman @lhn.bsky.social Security reporter for WIRED Magazine. she/her/my man. Signal +1 (347) 722-1347
Glenn @ntkramer.bsky.social Elder Millennial | 💼 Cybersecurity | I ask 'why?' a lot | Pro Oxford Comma | Fix it! | He/Him | #BLM | Views are my own.
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
Taggart @taggart-tech.com @mttaggart@infosec.exchange. Displaced Philly boy. Executive Director of @ifin-intel.org. Threat hunter. Educator. Dad. General in the AI Resistance.
taggartinstitute.org
wtfbins.wtf
linktr.ee/mttaggart
Lou @loustella.com Threat Researcher
NJ->TX->PA
Contains Multitudes.
Bob Lord @boblord.bsky.social Cautiously pessimistic, esp. about cyber things.
The owls are not what they seem. 🗻🗻🦉🌲🪵 🍒🥧☕️🍩 🕵🏼♀️ 👍🏻
Also: 🔐🔑🔒
And of course: hacklore.org
Other account: @hacklore.bsky.social
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/
Dave Wilburn @davemwilburn.bsky.social Recovering infosec engineer, machine learning for infosec, sailor, news junkie, threat intel consumer, deep statist. All opinions are mine. Also see my account on Mastodon/Fediverse, @davemwilburn@infosec.exchange
Sean Lyngaas @snlyngaas.bsky.social Cybersecurity reporter, CNN. Signal +1-202-355-8471 or SNLyng.11. sean[dot]lyngaas@cnn[dot]com|slyngaas@proton[dot]me
Ron Bowes @iagox86.bsky.social Staff Product Detection Engineer @ Censys. https://skullsecurity.org
Mostly post about professional stuff, maybe some improv stuff and maybe even magic some day. Seattle-based (originally Canadian), queer, cybersecurity nerd.
(He/him)
Allan @allanfriedman.bsky.social SBOM Champion. Paranoid about supply chains of all kinds. Former full-service technocrat at CISA, NTIA. Lapsed{engineer, academic, author}. Now wandering the world doing acts of infosec-goodness, & occasionally getting paid for it. Poster of food pics.
GreyNoise @greynoise.io GreyNoise analyzes Internet background noise. Use GreyNoise to remove pointless security alerts, find compromised devices, or identify emerging threats.
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
🇮🇪 🇬🇧 🇺🇸 
Matt Burgess (WIRED) @mattburgess1.bsky.social Security writer @wired.com
Cybercrime, privacy, surveillance, and more.
Signal: mattburgess.20 | Email: matt_burgess@wired.com
Matt Blaze @mattblaze.org Scientist, safecracker, etc. McDevitt Professor of Computer Science and Law at Georgetown. So-called expert on election security and a few other things. Slow photographer. RF nerd. Occasionally blogs at https://mattblaze.org/blog
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
Jake Williams @malwarejake.bsky.social Breaker of software, responder of incidents, IANS Faculty, VP R&D Hunter Strategy.
Rowdy @r0wdy.sk33t.expert electric callboy, bad golfer
SteveD3 (Steve Ragan) @steved3.io Father. Grandpa. Geek. Hacker. Former journalist. Security researcher. CMO @BSidesLV.org Member: Curated Intel 
Andrew Couts @couts.bsky.social Security & Investigations Director at @WIRED.com. Send tips and/or dog pics.
Signal: couts.01
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.
Christian Vasquez @chrismvasq.com hi chat, im a US-based freelance journalist covering tech and cyberspace // focus = h4x0rz + infrastructure + policy // priors:
cyberscoop, e&e news, politico
signal: chrismvasq.42
https://tips.hushline.app/to/chrismvasq
Vern McCandlish @malanalysis.bsky.social A #DFIR, #infosec, #dadjokes, #scifi, #books, #rpg, #ttx, #malware, elder #genx, and #gaming nerd. AKA an elder geek. Retired #leo. Retired from #infosec in #OT now too.
Kindness first is useful but telling off toxic folks is on my response spectrum too.
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/ 
Ciaran Martin @ciaranm.bsky.social AI slop cannon
AJ Vicens @ajvicens.bsky.social Cybersecurity correspondent at Reuters; former Mother Jones, CyberScoop. Will bore you with skateboarding, UFO lore or Denver Broncos minutiae on request. Signal: ajvicens.57, additional contact methods: https://tinyurl.com/47jc45h7
Mike Sager @mikesager.net CISO @ New Harbor
Security, rock and roll, dad jokes. Fan of The National and The Nationals. Former CTO at EMILY’s List.
msager.25 on Signal
Half awake, in a fake empire.
I have friends everywhere.
He/Him
mike@crabstrike.com
Jessica Lyons @jessicalyons.bsky.social Cybersecurity editor @theregister.com Contact me with tips: jessica.lyons@theregister.com or jess.825 on Signal
Mama bear, book worm, outdoor lover, coffee and wine snob. PNW after decades in Santa Cruz but Blazers fan always.
Matt Linton @amuse.bsky.social @0xMatt on Twitter
Rescue, DFIR, Cello and Birds
📎🇺🇦🌻 ginger-hax🌻🇺🇦🎃 @ginger-hax.bsky.social Dark beers. Dark whiskeys. Fast music. Fast cars.
Computers. BBQ. Photography. USMC veteran.
🫥Signal - ginger_hax.69
rh;pd
#w00w00
Joe Uchill @joeuchill.bsky.social Potential game show contestant.
Former Axios, The Hill, Passcode. Founder of the Codebook cybersecurity newsletter. Once got lost in a Starbucks.
Joseph Lorenzo Hall, PhD @josephhall.org Astrophysicist turned advocate; guiding the globe to a safer, stronger Internet. Distinguished Technologist @internetsociety.org, https://josephhall.org/, (former CDT, NYU, Princeton CITP, Berkekey iSchool/Astro)
TrendAI Zero Day Initiative @thezdi.bsky.social TrendAI Zero Day Initiative™ (ZDI) is a program designed to reward security researchers for responsibly disclosing vulnerabilities.
Jeffrey Vagle @jvagle.me Law professor | Privacy, AI*, and Technology & Society | Veteran | Offering bespoke mentor-mentee relationships | There is music yet to play | https://tractatus.org
Kenn White @kennwhite.bsky.social cryptography • neuro • cloud • biscuits
ORD-DCA-NYC-BCN ✈️
kennwhite@mastodon.social
nsqe @nsqe.bsky.social Head of Privacy @Incode. Board member @ Engine.is. Does the infosec law stuff too. Queer. Dorky. Lawyer, not really searching for redemption. @nsqe basically everywhere.
Be less toxic on bsky challenge, difficulty level pretty easy actually
Riana @riana.bsky.social Tech policy researcher at Stanford. Former litigator. Anger is an energy. Dum spiro spero. she/her
Jennifer Granick @granick.bsky.social Personal account. Former ACLU lawyer. From New Jersey. Living in San Francisco. New College of Florida alum. Newfie owner.
wendy knox everette @wendyck.bsky.social Startup CISO. BSidesLV Lockpick. Hacker lawyer. Amzn & Google alum, USCG wife, Wellesley, GMU Law. IAAL but IANYL.
Justin Schuh @justinschuh.com Back in Chicago as a stay-at-home dad and small business owner. Expect some infosec/privacy/safety, 3D printing, and politics.
infosec.exchange/@jschuh
Defunct: twitter.com/justinschuh
Justin Elze @handle.invalid CTO @TrustedSec.com | Former Optiv/SecureWorks/Accuvant Labs/Redspin | Race cars
Damien Miller @damienmiller.bsky.social debugging, v: the process of inserting printf statements into code until one's errors reveal themselves
Thomas Rid @ridt.bsky.social @ridt on X
Active Measures, LLC @activemeasures.bsky.social Active Measures, LLC is a full service research and writing firm. For details see activemeasuresllc dot com or reach out to walkin [at] activemeasuresllc [dot] com.
signal to noise//rel fvey, nato @signaltonoise.bsky.social Student of literature, law, and the classics. Marine intelligence manager turned attorney, now practicing cyber risk.
Cycles and loops, it’s all cycles and loops.
David Litchfield @litchfield.bsky.social Dad, Powerlifter, Security at Apple, Photographer