Doug Madory @eldomador.bsky.social Internet Analysis (BGP/NetFlow) at @kentik.bsky.social (formerly of Dyn Research and Renesys).
https://www.linkedin.com/in/dougmadory/
Phil Hagen @philhagen.com DFIR, security, networking, all things tech, OneWheel, Radinn, travel, LEGO, and probably a whole lot more in small and sporadic bits. (Squirrel!)
Fierce and unapologetic ally. He/him/his.
Stefano Zanero @raistolo.bsky.social Tinkerer, security geek, recovering entrepreneur, full professor at www.polimi.it, frequent flyer, private pilot, and generic pundit. He/Him ๐ณ๏ธโ๐โฉ
For aviation follow me on Instagram, same id!
Funranium (AKA Phil Broughton) @funranium.bsky.social The Cenobite of Sharing
The Black Blood of the Earth and Steins of Science guy. Everyoneโs friendly internet laser safety officer and health physicist. Happy to answer Antarctica questions.
www.funraniumlabs.com
AlternativeTo @alternativeto.net ๐ค AlternativeTo is the ultimate hub for discovering new and exciting software, no matter what platform you're on! Whether you're looking for apps for Windows, Mac, Linux, online services or mobile devices, we've got you covered!
Andrew Warkentin @andreww591.bsky.social OS/emulator developer and OS historian. Developer of UX/RT, an open-source QNX-like OS. Curator of the Virtual OS Museum, the world's largest collection of pre-installed emulated OSes: https://virtualosmuseum.org/
Kevin Beaumont @doublepulsar.com cybersecurity weather man. scanning the horizons for cloudy cyber. Expert at nothing except computer rubbish. Anti-ransomware since 2015.
ESET Research @esetresearch.bsky.social Security research and breaking news straight from ESET Research Labs.
welivesecurity.com/research/
OrangeCon @orangecon.nl The Dutch Cybersecurity Conference! Experience the Hackers Community in Amsterdam, on June 4th 2026!
Graham Cluley @grahamcluley.com Award-winning #cybersecurity keynote speaker, writer, podcaster | Host of multi-award-winning @smashingsecurity.com podcast.
โค๏ธ #DoctorWho, #Beatles, #Chess
He/him
๐ https://grahamcluley.com
๐๏ธ https://www.smashingsecurity.com
@bsidesncl.bsky.social @bsidesncl.bsky.social 
Yael Grauer @yaelwrites.com Pulitzer-winning investigative tech reporter. Looking for TPM roles supporting cybersecurity teams. ๐
๐ฃ https://yaelwrites.com
๐ yael@yaelwrites.com
๐ฅ #alwaysantifascist
โ๏ธ Support my work: https://ko-fi.com/kofisupporter11745
Cliff Fisher @brd.bsky.social Your friendly neighborhood Active Directory expert. Ex-Microsoft. Was @brdpoker on that other site. Also loves poker, board games, watching sports, and spending time with my wife and our fur kiddo. He/him
Zoey Selman (V3rbaal) @v3rbaal.bsky.social #ThreatIntel #InsiktGroup #RecordedFuture | OG #BlueTeamVillage #TraceLabs #L0nelyH4ckers | #DEFCON #DemoLabs Co-Lead
AnguaSec @anguasec.bsky.social Fuelled by caffeine and anxiety.
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.
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
Rik Ferguson @rikferguson.com Immigrant. VP Security Intelligence @Forescout, Co-founder @RespectInSec. Board @vaultree, Cybersecurity Futurist, Researcher, Award-winning writer/producer. He/Him. Pussy in bio.
Substack - Ferguson.ink
Slava Ukraini ๐บ๐ฆ
Kara Swisher @karaswisher.bsky.social Amanda Katz said this was the cool kids table.
Jimmy Wylie @mayahustle.com I look for ICS threats, and spend a lot of time reverse engineering.
Distinguished Malware Analyst @ Dragos.
Lead Analyst on TRISIS and PIPEDREAM.
He/Him
Marcia Hofmann @marciahofmann.com Digital rights lawyer and writer. Former Twitter, Electronic Frontier Foundation, Electronic Privacy Information Center, US-UK Fulbright.
Andrew Case @attrc.bsky.social Volatility Core developer, Dir. of Research Volexity, LSU Cyber
Lenny Zeltser @lennyzeltser.com Builder of security products and programs. Teacher of those who run them.
https://zeltser.com
DEF CON @defcon.bsky.social The worldโs premier hacker conference. Serving the global hacker community since 1993.
Defcon.org
Forum.defcon.org
Defcon.social
Andrew Morris @andrewmorr.is ๐ณ founder of @greynoise.io. computers, networks, technology enthusiast. big goober.
GreyNoise @greynoise.io GreyNoise analyzes Internet background noise. Use GreyNoise to remove pointless security alerts, find compromised devices, or identify emerging threats.
Ian Coldwater ๐ง๐ซ @lookitup.baby Kubernetes SIG Security Co-Chair.
I hack things and build community.
Minneapolis. They/them. Stay punk ๐ด
MSP feed info: https://bsky.app/profile/amityf.bsky.social/post/3mrv36uo4pc2a
Mark Russinovich @markrussinovich.bsky.social CTO of Microsoft Azure, author of novels Rogue Code, Zero Day and Trojan Horse, Windows Internals, Sysinternals tools. Opinions are my own.
Brad @malware-traffic-analysis.net Sharing information on malicious network traffic and malware samples at https://www.malware-traffic-analysis.net/
Chris Sanders ๐ ๐ง @chrissanders88.bsky.social Digital Forensic Analyst, Researcher, Author
Ed.D.
Founder Applied Network Defense and Rural Tech Fund
Former Mandiant, InGuardians, DoD
Author: Intrusion Detection Honeypots, Practical Packet Analysis, Applied NSM
@letsdefend.bsky.social @letsdefend.bsky.social 
Fabian Bader @fabian.bader.cloud #Security #Azure #EntraID #XDR #MDE #Identity #M365 #AD #PKI #KQL
Microsoft MVP
Tweets and opinions are my own
Patch My PC @patchmypc.com We develop a third-party #patch and application management solution for #Microsoft #ConfigMgr and #MSIntune. Learn more at http://patchmypc.com
Security Onion @securityonion.bsky.social By defenders. For defenders.
Peel back the layers of your network and make your adversaries cry.
https://www.securityonion.com
Antisyphon Training - Powered by BHIS @antisyphontraining.bsky.social Affordable and accessible cybersecurity training that doesn't suck.
Featuring cybersecurity practitioners, former SANS instructors, and industry recognized leaders from all over the world.
https://www.antisyphontraining.com
Zoรซ Rose @rosesec.bsky.social #mumSec
NetBlocks @netblocks.org The Internet's Observatory: Tracking cybersecurity and digital governance โข connectivity and democracy โข tools and policy for change โข https://netblocks.org
Travis Goodspeed @travisgoodspeed.bsky.social Author of books and tools for reverse engineering. Studebaker driver, but an awful mechanic. Home chip decapsulation.
Currently writing a new assembler, to be released in February.
Katie Nickels @likethecoins.bsky.social 
KiCad EDA @kicad.org The world's most popular circuit design suite. https://www.kicad.org
Bob Lord @boblord.bsky.social Cautiously pessimistic, esp. about cyber things.
The owls are not what they seem. ๐ป๐ป๐ฆ๐ฒ๐ชต ๐๐ฅงโ๏ธ๐ฉ ๐ต๐ผโโ๏ธ ๐๐ป
Also: ๐๐๐
And of course: hacklore.org
Other account: @hacklore.bsky.social
44CON @44con.bsky.social UK's best combined Information Security Conference and training event.
https://44con.com
TrustedSec @trustedsec.com End-to-end Cybersecurity consulting team leading the industry, supporting organizations, and giving back. #HackThePlanet
https://trustedsec.com/
Rich Warren @buffaloverflow.rw.md Red Team & Offensive Security Research @amberwolfsec.bsky.social
Chris @techgirlmn.bsky.social Maker Village lead, The Diana Initiative. I.T. lady for rural libraries. 
Firefox @firefox.com The only major non-profit backed, people-first browser ๏ธโ๐ฅ
Raspberry Pi @raspberrypi.com We make very small computers which you can buy from just $4. We are also the literal coolest.
Jake Moore @jakemooreuk.bsky.social Global Cybersecurity Advisor at ESET
www.jakemoore.uk
HollyGraceful @hollygraceful.bsky.social I climb stuff and I hack things.
Sam Swift ๐๏ธ๐ง๐ฆ @safesecs.bsky.social Cybers. DJish. Conwife. Nephophile. F1 Diva. Opinion Owner. Karaoke Disaster. ChiefDataSnarkist. She/Her/Bird.
BSidesNCL, BSides Leeds and BSides Lancs witch. DC SOC Goon ๐๐ณ๏ธโโง๏ธAlly.
Scott Helme @scotthelme.bsky.social Hi, I'm Scott Helme, a Security Researcher, Entrepreneur and International Speaker. I'm the creator of Report URI and Security Headers, and I deliver world renowned training on Hacking and Encryption.
https://scotthelme.co.uk
Unded Inside @undedinside.bsky.social Cyberpunk Magnetic Operator #LolzCrew. IT helpdesk analyst who writes cybersec guides as a hobby. (He/him) ๐๐ป
Lady Cyber Rosie ๐งโโ๏ธ @ladycyberrosie.bsky.social th4ts3cur1ty.company Magical Genie Person ๐งโโ๏ธ
Former/Recovering Cyber Security Recruiter
BSides Lancashire Founder
Responsible adult for BSides Leeds
Supporter of the Infosec community
Working Parent
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 โฆ.. hacker
http://Glenn.pegden.com/findmeon
Cooper @ministraitor.bsky.social Dutch software dev who spends his free time travelling all over the place to film a whole bunch of (mostly) security conferences.
Larry Osterman @larryosterman.github.io Long term MSFT employee, Dad, Singer.
Expect cat pictures, tech nerding, etc.
Previous: SMB filesystem, Exchange Store, Windows Audio, Windows Runtime, COM, Confidential computing.
Current: Azure SDK for C++
Proud LGBTQIA+ ally.
Profile pic from Not
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
๐ฎ๐ช ๐ฌ๐ง ๐บ๐ธ 
Pwnallthethings @pwnallthethings.bsky.social Just thinking out loud.
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
Adriana Porter Felt @apf.bsky.social I like writing silly skeets, but that doesn't pay so I also make Google Chrome. mamรก, Eng Director, volunteer at Second Harvest. ๐บ๐ฒ๐จ๐ท
Twitter: @__apf__
Katelyn ๐
Medusfour @medus4.com Activist, Hacker cosplayer, Artist. Data economy abolitionist.
@cdc_pulpit Sinfluencer, Head of Humanity @ Veilid, designer of weird shirts at hack.xxx
I love gross terrifying things. Because I am one
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
Matthew Green @matthewdgreen.bsky.social I teach cryptography at Johns Hopkins. https://blog.cryptographyengineering.com
Alex Stamos @stamos.org CPO/CSO of Corridor.dev, teaching at Stanford.
Rachel Tobac @racheltobac.bsky.social Hacker & CEO @SocialProofSec security awareness/social engineering training, videos, talks | 3X @DEFCON๐ฅ | Ex Chair @WISPorg | Ex @CISAgov Technical Advisory Council under Director Jen Easterly
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
Leigh Honeywell @hypatia.bsky.social Security, diversity, housing, Canadian stuff ๐จ๐ฆ. Cofounder and CEO of @tallpoppy.bsky.social; more at leighhoneywell.com
Runa Sandvik @runasand.bsky.social Founder of Granitt, securing journalists and at-risk people around the world. 
Deviant Ollam ใ @deviantollam.bsky.social Philadelphian in Cascadia. Vociferous champion for Oxford commas, two spaces after a period, and ellipses. I break into buildings. ๐
"Even if the world were ending tomorrow, I would still plant a tree." ๐ฒ
(he/they)
๐ต๐น snipe, lixo tรณxico โญโญโญโญโญ @snipe.lol Hacker, dev, CEO of @grokability.com, author, speaker, open sourcerer, sudo incarnate, poo doula. I make @snipeitapp.com. Was @snipeyhead. Married to @uberbrady.com. Vivo em Lisboa ๐ต๐น. #Laravel #FOSS
๐ snipe.net
๐ snipe.pt
๐ @snipe@hachyderm.io
DilDog ๐
@dildog.l0pht.com Tech Dysangelist
cDc/hack.xxx/Veilid
Support Veilid! Badge: ๐
www.veilid.com
Merch at: @hack.xxx
he/him/"hey buddy"
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.
Jake Williams @malwarejake.bsky.social Breaker of software, responder of incidents, IANS Faculty, VP R&D Hunter Strategy.
Elizabeth Wharton @lawyerliz.bsky.social Adviser, lawyer, and sometimes cybersecurity circus ringmaster - my monkeys fly.
Ray [REDACTED] @rayredacted.com Past: Host of "Tribe of Hackers"; Assoc. Producer "Darknet Diaries."
Current: Cybersecurity researcher and executive. Also, father of the fastest climber who has ever lived. Seriously.
Warning: I talk about my son ALOT
โUt scandis, alios subleva.โ
Maddie Stone @maddiestone.bsky.social Security Researcher at Google Project Zero. 0-days all day. Love all things reverse engineering. she/her
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 employersโ. https://falling-anvil.com
Tanya Janca | SheHacksPurple @shehackspurple.bsky.social Secure Code Trainer - Best-selling author of Alice and Bob Learn Secure Coding & Alice and Bob Learn Application Security. #AppSec she/her
https://shehackspurple.ca ๐ป
Ann Johnson @ajohnsocyber.bsky.social Cyber. Family. Dogs. Reading. Music. Baking. Cooking. Gardening. Pro sports. At Mastercard. But posts are just me.
Steve Syfuhs @syfuhs.net Noted idiot. Principal something or other. Runs the Windows Authentication team at Microsoft. It's my fault your password doesn't work.
Mostly dog pictures. Might actually be two dogs in a trench coat. ๐บ๐ธ / ๐จ๐ฆ
https://syfuhs.net/
Rowdy @r0wdy.sk33t.expert electric callboy, bad golfer
Nate Warfield @n0x08.bsky.social Network Security | Hacker | WIRED25 2020 | CTI-League Founder | Security Researcher
Kym Possible @kympossible.bsky.social Job Status: HBIC at @zatik.io
Iโve kissed mermaids, rode the El Niรฑo
Protect Trans People ๐ณ๏ธโโง๏ธ
Sherrod @sherrod.bsky.social Itโs me. Sherrod DeGrippo 
InfoSteph (92%) @stephandsec.com She/Her. Cybersecurity Educator & Engineer. Writer. Keynote Speaker. LinkedIn Learning Author (150K+ learners). Neurospicy (ADHD). Sharing insights to inspire growth and connection. Black and proud.
Stephandsec.com
Jess 'GirlGerms' Dodson @girlgerms.wtf SecOps Witch ๐ฎ
Lego zealot & Blizzard tragic ๐ฎ
Slave to 7yo terror ๐ถ
Australian based ๐ฆ
Provider of sarcasm & profanity ๐คฌ
she/her โ๏ธ
Views ALL MINE ๐
https://linktr.ee/girlgerms
Whitney Champion ๐ช @whit.zip security architect / co-founder @digitaldefenseinstitute.com / co-founder Recon InfoSec
โฅโฅโฅ == @eric.zip, nerdery, rainbows, sweatpants
she/her | mama of 3 | ๐ค๐๐ฟ๐๐
unicorns.lol
https://short-stack.net
whitneychampion.com/portfolio
Graham Christensen @grahamc.com determinate.systems. Nix obsessed.
he/him
๐ป no5ig
rand0h @akacki.net Goon / Degenerate / KD3CHT / Akacki.net / DEFCON610.org
Matt Johansen @mattjay.com Friendly neighborhood cybersecurity guy | expect infosec news, appsec, cloud, dfir. | Long Island elder emo in ATX.
vulnu.com <- sign up for my weekly cybersecurity newsletter
Dragan B. @mrxdragan.bsky.social ๐ฆป| ๐ท๐ธ๐ญ๐ท | BSc Cyber Security | Living in the ๐ฌ๐ง | @AdorablyTeam | SOC | CTF/OSINT | he/him
SteelCon @steelcon.info SteelCon is a family friendly hacker conference in Sheffield.
Next event is July 2026.
Kelly Shortridge @shortridge.bsky.social software resilience, cybersecurity, complex systems | chief product officer @fastly.com | nyc
โIn the information society, nobody thinks. We expected to banish paper, but we actually banished thought.โ
kellyshortridge.com
@swagitda_ on Twitter
Ugur Koc @ugurkoc.de Microsoft MVP | ๐ http://KQLSearch.com | ๐ http://IntuneMacAdmins.com | ๐๏ธ http://IntuneOffboarding.com | ๐ http://IntuneMonitoring.com
ExecuteMalware @executemalware.bsky.social Malware analyst