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
SwiftOnSecurity @swiftonsecurity.com computer security person. former helpdesk
Meredith Whittaker @meredithmeredith.bsky.social President of Signal, Chief Advisor to AI Now Institute 
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
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
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.
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.
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
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
gab 🇺🇦🇵🇸 @gabagool.ing 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.
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
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.
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.
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
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
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
Andrew Couts @couts.bsky.social Security & Investigations Director at @WIRED.com. Send tips and/or dog pics.
Signal: couts.01
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.
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
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*, Technology and Society | Veteran | Offering bespoke mentor-mentee relationships | There is music yet to play | https://tractatus.org
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
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.
Micah Schaffer @micahsch.bsky.social 
obscure - cDc 🅅 @obscure.bsky.social I am angry, I am ill, and I am as ugly as sin. My irritability keeps me alive and kicking. I know the meaning of life, it doesn’t help me a bit.
cDc Cultee
tweety fish @sifu.tweety.fish at different times:
haxx0r in cDc
PhD in using people for ML and vice versa
"theory of mind for autonomous cars" startup guy would you believe, went kablooie
at present: newsletter -- buttondown.email/apperceptive
&c music, politics, nonsense
DilDog 🅅 @dildog.l0pht.com Tech Dysangelist
cDc/hack.xxx/Veilid
Support Veilid! Badge: 🅅 www.veilid.com
Merch at: @hack.xxx
he/him/"hey buddy"
Jun34u @jun34u.bsky.social Alaskan in Los Angeles. Chaotic idealist.
Hacker, Writer, and Game Theorist
cDc Cultist
Forever Script Kiddie
She/They 🏳️🌈🏴☠️
@lodrina.bsky.social @lodrina.bsky.social "liberal arts section of the computer underground" -j. menn
Rich Mogull @rmogull.com Cloud security, hacker, run/bike/drown, TK11940 in the 501st, itinerant disaster paramedic, private pilot, and other stuff. @rmogull on Signal
Chief Analyst at CSA. CEO of Securosis. Both totally made up titles.
https://slaw.securosis.com
Richard Johnson @richinseattle.bsky.social Fuzzing; Vulnerability Research;
Deep Learning; Reverse Engineering
Training & Publications @ http://fuzzing.io
Hacking the planet since 1995
Undercurrents.io BOFH
I'll stop the world and melt with you
Luca @securescientist.eu Dad, husband, cybercrime prof with a kink for attacker economics. Head of the Threat Analysis group @tue.nl. 🇳🇱 by profession, 🇮🇹 by nature, 🇪🇺 by conviction. Optimistic cynicism is my thing. Love most. 🌏🔗securescientist.eu
Russell Devine @rjmd.bsky.social 💼 Cybersecurity 📀 Forensics & Response
All opinions are from a southern right whale I met off the coast of Tasmania 🐋
Suzanne Smalley @suzannesmalley.bsky.social Reporter covering digital privacy and cybersecurity policy for The Record. Mom. Pub trivia queen. Crossword enthusiast. Literary fiction connoisseur. Idiosyncratic. Signal: Suzanne.236 Email: suzanne.smalley@therecord.media.
Gerald Benischke @beny23.github.io Maker, breaker and fixer of software. Adventures in #appsec and #agile: beny23.github.io he/him
Jamie Brummell @jamieb.com Dad • Gamer • Humanist • InfoSec • Cyber • Founder & CTO @socura.co.uk • MDR / SOC • Detection Engineering • DFIR
🌐 jamieb.com
📍 Buckinghamshire, UK
shellsharks @shellsharks.com Infosec researcher | more about me @ https://shellsharks.com
@shellsharks@shellsharks.social on Mastodon
Nicole Hoffman @threathuntergirl.bsky.social Friendly Neighborhood CTI Analyst | Children’s Book Author | Lego builder | Gamer | She/Her
The Dustin Childs @dustinchilds.bsky.social Just a simple information security gnome trying to make his way through the universe. Part-time patch wrangler. Tweets are just my opinion and such. Got questions about patches or bug bounties? My DMs are open. Signal: DustinChilds.17
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"
omgmike @mikecherry.bsky.social “A riot is the language of the unheard.”
- MLK
Staff ProdSec Engineer @ place
Joe Warminsky @jwarminsky.bsky.social News Editor at The Record: @therecordmedia.bsky.social
[ Tired of bios ]
[ Often thinking about music ]
[ Etc. ]
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.
Matteo @ hacking and cracking @geminiimatt.bsky.social Hacker. Founder of , @cryptoharlem.bsky.social, counter-surveillance, safety, and security expert. Pushing back against inequality in all it's forms. Anti surveillance, trainer to all marginalized & oppressed people everywhere. (He/They)
Hexadecim8 @hexadecim8.com Author | spooky trans athlete | Linux behavioral threat researcher | never hacked nobody
https://hexadecim8.com
Supriya @supriyam.bsky.social Now Google Threat Intelligence & doing fun things at DistrictCon, fmrly GreyNoiseIO and RecordedFuture, SAISHopkins MASCI alumna | ♡s & rts are my own, my employer definitely doesn’t like Taylor Swift that much
Christopher Vega @thevega.bsky.social I do threat intel things. Former Activision Blizzard // Epic Games. Currently putting the G in 5G. Kinda passionate and extremely okay. Opinions are my own. He/him/#FSD 🦆
Charles @charles.dardaman.com AI | Hacking | Security | Malware | Founder/CTO (acq.) | CS PhD @UT_Dallas
Ollie Whitehouse @ollieatnowhere.bsky.social CTO at the UK's National Cyber Security Center 
Martin Matishak @martinmatishak.bsky.social Senior Cybersecurity Reporter at The Record from Recorded Future News. Send tips to martin.matishak@therecord.media. Signal: mmatishak.80
Martin Shelton @mshelton.bsky.social Security therapist. Deputy director of digital security @freedom.press.
Mastodon: https://mastodon.social/@mshelton
Digisec newsletter: https://freedom.press/newsletters
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
Leigh Honeywell @hypatia.bsky.social Security, diversity, housing, Canadian stuff 🇨🇦. Cofounder and CEO of @tallpoppy.bsky.social; more at leighhoneywell.com
Chris Wysopal @weld.bsky.social Gray haired gray hat. Co-founder Veracode. Former L0pht security researcher. Builds tools to find and fix vulnerabilities in code at scale.
David DiMolfetta @ddimolfetta.bsky.social Nextgov/FCW cybersecurity + intelligence reporter. Tips: ddimolfetta@govexec.com Signal: @ djd.99 X/Twitter: @ddimolfetta
James Pearson @pearswick.press Visual Investigations Journalist at @Reuters.com, via Hanoi, Seoul, Pyongyang and cyberspace. Now in London.
“A bum who wrote an ignominious jumble of stories”
- North Korea ★ ★ ☆ ☆ ☆
📞Signal ID: pearswick.01
💻: pearswick.press
Frank Bajak @fbajak.bsky.social Journalist with tech focus. Ex-Associated Press foreign correspondent. First AP tech editor, Andes chief. frankbajak.com fbajak(at)proton(dot)me - DM for Signal#
David Oxley @oxley.io Senior leader for detection and response at Anduril Industries. @CitizenLab.ca Research Fellow. Former federal agent. Fan of space, books, cyberpunk, sci-fi, espionage history, and storms. Personal account. 🇺🇸 🇺🇦 🇹🇼 #ThreatIntel
Storm chasing 📸 🌪️: @wxdox.com
Avani @avani.bsky.social ML/Systems researcher with delusions of neuroscience and cryptography. Currently @Cloudflare and Emory. Dilettante SFF writer. Fellow of Odd Salon. I like to play the drums. #vp2023 #cw2026.
https://linktr.ee/circumviso