CrikeyCon @crikeycon.bsky.social 
PentesterLab @pentesterlab.com We make learning web hacking and security easier. Online systems, code review, videos & courses that can be used to understand, test and exploit bugs!
HaxRob @haxrob.net Telco / mobile and IoT security.
Surfing the information super highway one keystroke at a time.
https://haxrob.net
TrendAI Zero Day Initiative @thezdi.bsky.social TrendAI Zero Day Initiative™ (ZDI) is a program designed to reward security researchers for responsibly disclosing vulnerabilities.
cybliminal @cybliminal.com A boutique, threat informed, defence focused cyber security company.
Dave Kempe @sol1.com.au Network Automation, Monitoring, Icinga, Netbox, Ansible, Open Source stuff. I also spun out a new startup - knocknoc.io 
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
Thomas Ptacek @sockpuppet.org Full of passionate intensity.
Alyssa Miller 🦄👩✈️ @alyssam-infosec.com Hacker, CISO, and commercial pilot. Certified Bluesky Elder. Author and International Speaker, Chief advocate of #DoBetterBeBetter
Compassion and empathy are traits in short supply but necessary to make this world a better place.
alyssasec.com
David Maynor @davemaynor.bsky.social threat intelligence and R&D
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
CyberScoop @cyberscoop.bsky.social We report on news and events impacting technology and security. https://linkin.bio/cyberscoop/
GreyNoise @greynoise.io GreyNoise analyzes Internet background noise. Use GreyNoise to remove pointless security alerts, find compromised devices, or identify emerging threats.
DilDog 🅅 @dildog.l0pht.com Tech Dysangelist
cDc/hack.xxx/Veilid
Support Veilid! Badge: 🅅 www.veilid.com
Merch at: @hack.xxx
he/him/"hey buddy"
404 Media @404media.co it's a website (and a podcast, and a newsletter) about humans and technology, made by four journalists you might already know. like and subscribe: 404media.co
motherboard @motherboard.bsky.social tech by VICE
read: motherboard.vice.com
watch: https://www.tiktok.com/@motherboardvice
ShmooCon @shmoocon.bsky.social Jan 10-12, 2025
Washington, D.C.
Less 🫎 Than Ever
This account is mostly used to push information. Got questions? Email us at info @ shmoocon.org.
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
userfx @flipperzero.bsky.social (unrelated to flipper devices) Vaporpunk music guy, bae is hashnix.club/~x.ghostgurl.x ❤️❤️, mod of Cult of Kroovy (JOIN NOW >> twitch.tv/theredredkroovy), dj of "netstash" on tilderadio.org every Thurs 0hr UTC.
JOIN HASHNIX >> hashnix.club- R @riskybusiness.bsky.social @riskybusiness.bsky.social
Troy Hunt @troyhunt.com Founder & CEO of @haveibeenpwned.com, the most trusted name in data breach intelligence. Speaker, blogger, Microsoft Regional Director. Gold Coast, Australia.
Jeff Moss @thedarktangent.bsky.social thedarktangent@defcon.social
44CON @44con.bsky.social UK's best combined Information Security Conference and training event.
https://44con.com
vortex @vortex.au I do offensive security things on the internet
@georgehotz.bsky.social @georgehotz.bsky.social 
Beau Woods @beauwoods.com hack all the cybers
Matthew Green @matthewdgreen.bsky.social I teach cryptography at Johns Hopkins. https://blog.cryptographyengineering.com
Łukasz @lukasz.bsky.social Breaking bad UTF-8 implementations since 1991. I secure cybers and run trails. If I’m posting, I’m hopefully not on a trail. Views own. He/him
Pwnallthethings @pwnallthethings.bsky.social Just thinking out loud.
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
BSides Las Vegas @bsideslv.org BSides Las Vegas will take place August 3-5, 2026
Las Vegas · bsideslv.org
Alperovitch Institute @alperovitch.institute The Alperovitch Institute for Cybersecurity Studies at Johns Hopkins SAIS.
Patrick C Miller @patrickcmiller.bsky.social Critical Infrastructure & Industrial Security Advisor. Ampyx Cyber CEO. Public speaker. Airport dweller. Recovering regulator. BEERISAC member. CCI US Coordinator. Former SANS Instructor.
#ICS #OT #NERCCIP #NIST #IEC62443 #NIS2 #CRA #SlavaUkraini
Eric Goode @esgoode.bsky.social Energy expert: former @ferc, former @SenDuckworth energy and enviro staffer, John Hopkins U Masters in Enviro Science and Policy. My opinions are my own. 
Jennifer Granick @granick.bsky.social Personal account. Former ACLU lawyer. From New Jersey. Living in San Francisco. New College of Florida alum. Newfie owner.
Ryan Naraine @ryanaraine.bsky.social Three Buddy Problem
https://securityconversations.com
Ryan Shapiro @rshapiro.bsky.social Co-founder/Executive Director @propertyofthepeople.org. PhD @MIT. Previously @BKCHarvard. FOIA. nat sec. animals. punk rock. https://propertyofthepeople.org/ 🌱
Dave Aitel @daveaitel.bsky.social 
Matt Palmer @matt.je Cyber defence, incident response & international finance. Personal acct, my views. Connect at https://www.linkedin.com/in/mattpalmercyber
Robert McMillan @bobmcmillan.bsky.social Cybersecurity reporter for the Wall Street Journal
Adam Shostack @adamshostack.bsky.social Threat modeling. BH Review Board. Affiliate Professor, UW. Fixed autorun. Helped create CVE.
Not sure why we're building graphs on yet another (effectively) centralized system. https://infosec.exchange/@adamshostack
Haroon Meer @haroonmeer.canary.love Security Geek. We build Thinkst Canary - https://canary.tools
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
Mark Dowd @mdowd.bsky.social Internet hacker
SwiftOnSecurity @swiftonsecurity.com computer security person. former helpdesk
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
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
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.
Rob Joyce @rgblights.bsky.social Cyber guy. Former NSA cybersecurity director and chief of TAO. Lover of memes. Warning - occasional outrageous Christmas light content.
Bellingcat @bellingcat.com Bellingcat is a global collective uncovering facts to hold power to account. Our work is independent. Our methods are public. Our community is global.
Want to support our charity? bellingcat.com/donate
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.
Tom Uren @tom.risky.biz Author of the Seriously Risky Business cyber security newsletter
Matt Burgess (WIRED) @mattburgess1.bsky.social Security writer @wired.com
Cybercrime, privacy, surveillance, and more.
Signal: mattburgess.20 | Email: matt_burgess@wired.com
DPRK CERT @dprkcert.bsky.social Official Computer Emergency Response Team (CERT) for the Democratic People's Republic of Korea
#NorthSide #NorthKoreaBestKorea
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
Catalin Cimpanu @campuscodi.risky.biz ☆ Cybersecurity reporter
★ Newsletters at Risky Business
#infosec #cybersecurity
https://risky.biz
Jack Rhysider @jackrhysider.bsky.social Creator of Darknet Diaries.
Verification: https://twitter.com/JackRhysider/status/1675298532406984707
Damien Miller @damienmiller.bsky.social debugging, v: the process of inserting printf statements into code until one's errors reveal themselves
the grugq @thegrugq.bsky.social 
Stilgherrian @stilgherrian.com Word-whore • Write 'em, Talk 'em • Cybers, politics, media • I have a podcast, obviously • Signal +61407623600 • All hail Eris! Vive les poissons rouges sauvages! • Based in Sydney NSW AU.
https://stilgherrian.com • https://linktr.ee/stilgherrian
Matthew Proctor / AfterTheCloud @proctor.com.au Indie Game Dev - twitter.com/after_the_cloud, errlog.io, Unity & .Net dev, Pluralsight author, Kilimanjaro Climber, Skydiver. (he/him)
David Litchfield @litchfield.bsky.social Dad, Powerlifter, Security at Apple, Photographer
Alex Stamos @stamos.org CPO/CSO of Corridor.dev, teaching at Stanford.
@mikko @mikko.bsky.social Fighting malicious use of technology.
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."
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
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
HD Moore @hdm.infosec.exchange.ap.brid.gy runZero & Metasploit
🌉 bridged from ⁂ https://infosec.exchange/@hdm, follow @ap.brid.gy to interact
cje @cje.io founder @bugcrowd && co-founder @disclose_io || hacker, entrepreneur, executive, advisor || عصا موسى || #w00w00
Louis Nyffenegger @snyff.pentesterlab.com Founder/CEO/Trainer/Researcher/CVE archeologist
@PentesterLab. Security engineer. Bugs are my own, not of my employer...
HD Moore @hdm.io runZero & Metasploit
@halvarflake.bsky.social @halvarflake.bsky.social 
Robert Graham @erratarob.bsky.social @erratarob on the hellscape site
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.
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/
lcamtuf @lcamtuf.coredump.cx Blog: https://blog.coredump.cx/archive
Homepage: https://lcamtuf.coredump.cx
Chris Krebs @thekrebscycle.bsky.social Aka @c_c_krebs over there 
metlstorm @metlstorm.risky.biz Unix berserker, retired hacker-con organiser (Kiwicon!) and now technology-editor-slash-sysadmin-janitor at Risky.biz.
Was @metlstorm on Twitter, am metlstorm@infosec.exchange on Masto. 
Tim Watts MP @timwattsmp.bsky.social Special Envoy for Indian Ocean Affairs; Member for Gellibrand. Authorised: Tim Watts, Australian Labor Party, 455 Melbourne Rd Newport.
Knocknoc.io @knocknoc.io Cybersecurity software that removes attack surface
Patrick Gray @patrick.risky.biz https://risky.biz/