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Czech Team 🇨🇿 #LockedShields 2017 winner! Estonian team 🇪🇪 2nd @e_riik , NCIRC 3rd @NCIAgency! Congrats to all!
Just announced the winner of #lockedshields exercise 2017 - Czech Republic! Congratulations from @ccdcoe
Have a good one, #LockedShields !
#lockedshields @ccdcoe - record level of press interest. 20 defending teams, 800+ participants
Live-fire #cyberdefence exercise #LockedShields 2017 is on - more complex, more intense and more fun than ever
Around 800 participants from 25 nations take part in #CyberSecurity exercise #LockedShields 2017 bit.ly/2q6Ylh8
Need to know what’s at stake in cyberspace for Internet users and citizens? Find out at The Cyber Loop. thecyberloop.com. #hackers
Want an insider’s view of White House ‘Situation Room’ operations for cyber? Find out more at The Cyber Loop, thecyberloop.com #cyber
Need a primer on cyberspace and all things cyber? Find it at The Cyber Loop. thecyberloop.com #cyber #cyberwar #cyberspace #primer
Who came up with the term "cyber"? Find out at The Cyber Loop. thecyberloop.com #cyber #cyberwar #cyberspace #neurmancer
Who controls the internet? Find out at The Cyber Loop. thecyberloop.com #cyber #cyberwar #cyberspace
Need to know what’s at stake in cyberspace for Internet users and citizens? Find out at The Cyber Loop. thecyberloop.com. #hackers
Want an insider’s view of White House ‘Situation Room’ operations for cyber? Find out more at The Cyber Loop, thecyberloop.com #cyber
Need a primer on cyberspace and all things cyber? Find it at The Cyber Loop. thecyberloop.com #cyber #cyberwar #cyberspace #primer
Who came up with the term "cyber"? Find out at The Cyber Loop. thecyberloop.com #cyber #cyberwar #cyberspace #neurmancer
Who controls the internet? Find out at The Cyber Loop. thecyberloop.com #cyber #cyberwar #cyberspace
Need to know what’s at stake in cyberspace for Internet users and citizens? Find out at The Cyber Loop. thecyberloop.com. #hackers
"Threats in #cyberspace are real and it is rightfully becoming a domain of warfare." VADM Takanen of #Finland
Want an insider’s view of White House ‘Situation Room’ operations for cyber? Find out more at The Cyber Loop, thecyberloop.com #cyber
JohnM @MascioJ
28 Followers 178 Following
NSArchive Cyber Vault @NSArchiveCyber
1K Followers 260 Following A public resource for documents on cybersecurity, with a focus on the U.S. Freedom of Information Act (FOIA). @NSArchive
Elsa B. Kania @EBKania
19K Followers 11K Following Adjunct @CNAStech | 2026 Fellow @WarInstitute | PhD @Harvard_GovDept | US-China strategy, technology, and defense innovation | views my own, and always learning
Protect Our Power @GridProtection
2K Followers 2K Following Protect Our Power is a not-for-profit nonpartisan organization comprised of industry experts focused on strengthening the nation’s electrical power grid.
Alex Grigsby @AlexG_Cyber
45 Followers 542 Following
Eli Sugarman -- @elis... @EliSugarman
3K Followers 2K Following Fellow @ Schmidt Futures; Former OversightBoard; I aspire to name my dog #Chewbacca; personal account, tweets are my own and rt is not endorsement.
Netanel @Netane_l
8 Followers 186 Following
ZeroPoint Security @Zeropoint_SEC
38 Followers 45 Following Our mission is to make cyber defence intelligent and effective across the active defence lifecycle: Learn, Control and Hunt
J. Burkett @Mr_JBurkett
3K Followers 4K Following Information / Cyber Security Enthusiast, Technologist, Amateur Photographer, Dodgeball Prodigy & 5th Grade won 2nd place 🥈100yd Dash...#InfoSec #CyberSecurity
Asif Ali @Asif_H_Ali
7 Followers 180 Following
john jones @sorealjj
0 Followers 9 Following Researcher into patriotic hackers and their role in cyber warfare.
Alexa Lee @alexalee_DC
440 Followers 566 Following Global Government Affairs Qualcomm & Non-Resident Fellow @belfercyber & Associate Editor @digiChn. @SAISHopkins grad. Views my own.
Marcela Gaviria @realmarcellular
2K Followers 4K Following
Christian VdW 💙�... @gh057duck
192 Followers 534 Following Tech + cyber policy by day | Art by night | Doting dog dad | Equal blend of David, Alexis, & Moira | My opinions, not my employer's
Cyber Conflict Intel @cyberconflicts
44 Followers 273 Following Tracking hacktivism, nation-state cyber attacks and information operations. Tweet to / DM me about new cyber conflicts and hacktivism.
david webb @footloose007
1 Followers 663 Following
Anand Raj Shah @anandrajshah
154 Followers 2K Following Boulevardier. Oranjlife. Cybersecurity Geek.
America's Future @AmericasFuture3
71 Followers 580 Following
Isabel Skierka-Canton @i_skierka
2K Followers 988 Following technology & politics, resilient digital government @ govdigital | PhD from @TallinnTech | formerly @ESMTberlin, @GPPi
Gareth Niblett @garethniblett
1K Followers 830 Following security | privacy | compliance 🐘 https://t.co/fYRENuoJiW master distiller @manorspirits 🇬🇧🇩🇪🇪🇪
David Sanger @SangerNYT
97K Followers 3K Following White House and National Sec. Corresp., New York Times. Author of "Confront and Conceal," "The Inheritance," and “The Perfect Weapon." April 16: "New Cold Wars"
DanielD. @rootniz
115 Followers 2K Following Humble servant and protector | Infosec Jedi Knight | Force user and believer|R2-D2 friend|#Cybersec Opinions=mine. PGP: C8FF2C0AC04533FBA6948969809034C174EFC16A
Dr. Soner ÇELİK @soner_clk1234
401 Followers 957 Following Bir zamanlar asker Ehline denk gelmeyen herşey ziyan olur, can da inci mercanda..
Kubo Mačák @KuboMacak
4K Followers 986 Following Professor of International Law @UniofExeter | previously Legal Adviser @ICRC | author of Internationalized Armed Conflicts in International Law (OUP 2018)
Piret Pernik @piret_ccdcoe
552 Followers 1K Following National security and defence, defence technology, cybersecurity and -defence/Estonian Defence Force
scadaman @scadaman
3K Followers 5K Following “They will beat their swords into plowshares and their spears into pruning hooks. Nation will no longer fight against nation, nor train for war…” —Isaiah 2:4
Geopol Analyst @S207183
720 Followers 985 Following International security, diplomacy, military & intel.
Robert Pritchard @TheCyberSecExp
3K Followers 3K Following Cyber security nerd. Former UK gov cyber security. Security consultant & capacity builder. RUSI Associate Fellow. Creator of Soothsayer
ARC4DIA @ARC4DIA
1K Followers 976 Following HUNT, FIGHT, and WIN with SNOW, the world's most powerful defense against advanced cyber threats from ARC4DIA Cyber Defense.
xitami @xitame
0 Followers 19 Following
Adam Segal (@adschina... @adschina
12K Followers 3K Following On leave @CFR_org now @StateCDP (see pinned tweet); Hacked World Order https://t.co/SgzNoG2lwD Opinions my own. RTs ≠endorsement
Corey Varma @CoreyVarma
490 Followers 264 Following Attorney focused on #infosec, #privacy law, #cyberspace law.
Rizwan On Mars @RizwanOnMars
19 Followers 43 Following Capturing interesting photons during my Earthly travels. All photos taken by me on the planet Earth (unless otherwise noted).
Ricochet @ChristopherDue3
203 Followers 2K Following Inquisitive software and hardware user. Tinker and all around mischief hunter. When allowed I sometimes play Cybersecurity professional
Diligent Consulting @DiligentCons
33 Followers 68 Following
Paul Denham @pauldenhamUSN
53 Followers 650 Following IBM Global Sales Leader for Inside Sales. Retired Navy Captain and submarine officer.
DataCenter News @DCNToday
994 Followers 902 Following Bringing you the latest IT trends all over the world
Semi Test Robot @SemiTestRobot
17K Followers 53K Following Everything Semiconductor | Test & Measuerment I Military Aerospace I Electronic Components | Automotive Electronics | RF Microwave | Fiber Optic Devices
Kali Jordan @ITA_Jordan
4 Followers 118 Following
Jennifer McArdle @jlmcardle01
2K Followers 737 Following US GM @HelsingAI, Adj Sr Fellow @CNASdc, Editorial Board @THINKJSOU, PhD @warstudies, defense tech
Sara Mitchell @SheSellsMSFT
63 Followers 234 Following Sr. Commercial Executive - Microsoft USPS/Federal/DoD
Novetta - a part of A... @Novettasol
2K Followers 2K Following Empowering customers to gain clarity from the complexity of #BigData in #ML, #Cloud, #Cyber, #Data, #MultiINT, and #OpenSource #Analytics, at speed and scale.
Dave Shaffer @Dave_C_Shaffer
82 Followers 400 Following
Natali Fernandes @piscar_olhos564
343 Followers 1K Following num piscar de olhos vejo seguidores lindos
Merritt Baer @MerrittBaer
13K Followers 8K Following Chief Security Officer. company advisor. former: @AWS OCISO, USG security. work: emerging tech, infosec, AI, future
Peter W. Singer @peterwsinger
41K Followers 966 Following Half serious tweets Founder https://t.co/e6ucTv7x9P ; Strategist @NewAmerica ; Prof @ASU @Future_of_War Author of https://t.co/m6hnMyEzJn https://t.co/94E7OdtL76 https://t.co/VENOvMIctU
CCSA @CCSAORG
713 Followers 752 Following Cyber Conflict Studies Association (CCSA) is a non-profit organization dedicated to leading a diversified research agenda in the field of cyber conflict.
NATO @NATO
2.0M Followers 1K Following Working for peace, security & freedom for one billion people. Official X account of the North Atlantic Treaty Organization #NATO
NCIA @nato_ncia
10K Followers 1K Following The NATO Communications and Information Agency: #WeAreNATO’s technology and cyber experts.
Bureau of Cyberspace ... @StateCDP
24K Followers 251 Following This account was retired on 12/31/25. Follow @UnderSecE and @EconAtState for updates.
Gareth Niblett @garethniblett
1K Followers 830 Following security | privacy | compliance 🐘 https://t.co/fYRENuoJiW master distiller @manorspirits 🇬🇧🇩🇪🇪🇪
TechTarget News @TechTargetNews
33K Followers 1K Following Sharing the latest tech news, tips and in-depth insights, covering AI, cloud, cybersecurity, DevOps and more from the Editorial team at @InformaTTGT!
U.S. Army Cyber Cente... @Army_Cyber_CoE
14K Followers 342 Following Cyber threats demand new approaches to managing and securing information and ensuring our ability to operate.
RHUL Cyber CDT @RHULCyberCDT
1K Followers 209 Following Twitter feed of the EPSRC Centre for Doctoral Training in Cyber Security at Royal Holloway University of London. Follow our blog here https://t.co/6ZsOFhpe1P
Andreas Haggman @Andreas_Haggman
723 Followers 691 Following On hiatus from Twitter/X | DMs open and checked occasionally
David Sanger @SangerNYT
97K Followers 3K Following White House and National Sec. Corresp., New York Times. Author of "Confront and Conceal," "The Inheritance," and “The Perfect Weapon." April 16: "New Cold Wars"
sven sakkov @sakkov
7K Followers 354 Following Ambassador of 🇪🇪 to 🇬🇧. Former Amb to 🇫🇮 / director of ICDS (@ICDS_Tallinn) / director of NATO Cyber Center (@ccdcoe) / POLDIR of @MoD_Estonia.
Chris Painter @C_Painter
6K Followers 283 Following Fmr President @theGFCE Foundation, Fmr top Cyber Diplomat, NSC Sr.D & fed pros w/30 yrs in cyber; film, wine & Indie fan. Commsnr @theGCSC; @CSIS @ChathamHouse
CrowdStrike @CrowdStrike
111K Followers 791 Following The first cloud-native platform that protects endpoints and cloud workloads, identity & data. #WeStopBreaches. Free trial: https://t.co/msBcUPjFKo
Kubo Mačák @KuboMacak
4K Followers 986 Following Professor of International Law @UniofExeter | previously Legal Adviser @ICRC | author of Internationalized Armed Conflicts in International Law (OUP 2018)
Valeriano @drbvaler
2K Followers 487 Following Brandon Valeriano Seton Hall, School of Diplomacy Royal Danish Defence College Cyberspace Solarium 2.0 https://t.co/SabgcdkGH7
Jan Neutze @JanNeutze
2K Followers 580 Following Director, Sandbox Dubai @DubaiFuture. Ex-@Illumina, Ex-@Microsoft, Ex-@UN. Husband & Dad. All things soccer. Opinions are my own, RT ≠ endorsement.
Trellix @Trellix
241K Followers 1K Following Mission-critical security for intelligence-led cyber resilience
SE LABS ® @selabsuk
616 Followers 44 Following Intelligence-led security testing. Results with analysis. Updates: https://t.co/Hi63ucrREy
Valéry Rieß-Marchiv... @ValeryMarchive
10K Followers 714 Following Rédac' chef @LeMagIT - ministre des #ransomware (proposé) - DM ouverts
Erka Koivunen @ekoivune
3K Followers 1K Following An engineer by training, a hacker by heart. Conditioned to think like a CISO would. An E𝕏 Twitter user, now at: @ekoivune.bsky.social, @[email protected]
Kim Zetter @KimZetter
94K Followers 3K Following Journalist - cyber/national security. Author - COUNTDOWN TO ZERO DAY: Stuxnet and the Launch of the World's First Digital Weapon. https://t.co/334DzfSL1f
Thomas Rid @RidT
51K Followers 284 Following Author of ACTIVE MEASURES, RISE OF THE MACHINES, CYBER WAR WILL NOT TAKE PLACE, "Attributing Cyber Attacks," more. Johns Hopkins, Alperovitch Institute.
NATO CCDCOE @ccdcoe
20K Followers 1K Following The mission of NATO CCDCOE is to enhance the capability, cooperation & information sharing among NATO, NATO nations & partners in cyber defence.
Jennifer McArdle @jlmcardle01
2K Followers 737 Following US GM @HelsingAI, Adj Sr Fellow @CNASdc, Editorial Board @THINKJSOU, PhD @warstudies, defense tech
Adam Segal (@adschina... @adschina
12K Followers 3K Following On leave @CFR_org now @StateCDP (see pinned tweet); Hacked World Order https://t.co/SgzNoG2lwD Opinions my own. RTs ≠endorsement
New America Cyber @NewAmCyber
6K Followers 1K Following Tweets from @NewAmerica's Cybersecurity Initiative
Isabel Skierka-Canton @i_skierka
2K Followers 988 Following technology & politics, resilient digital government @ govdigital | PhD from @TallinnTech | formerly @ESMTberlin, @GPPi
Mandiant (part of Goo... @Mandiant
129K Followers 4K Following We’re determined to make organizations secure against cyber threats and confident in their readiness.
SC Media @SCMagazine
119K Followers 2K Following The official Twitter feed for all things IT security. A CyberRisk Alliance Resource.
Winn Schwartau @winnschwartau
2K Followers 229 Following Analogue Security Guy. Cybersecurity since 1983; Chief Visionary Officer & Founder, SAC Labs, a division of KnowBe4. Born as a Recording Engineer Producer.
Simson Garfinkel @xchatty
2K Followers 2K Following Computer scientist & journalist, specializing in AI, privacy, ethics, big data, usability and security. My opinions here. ORCID 0000-0003-1294-2831
CyberThreat @TheCyberThreat
3K Followers 2K Following We track and report on cyber threats and ways to stop the threat. Curated by @bobgourley of @ctovision http://t.co/Pvhk1Z1Ptg
Bill Marion @Marion_CIO
4K Followers 3K Following Former DoD level CIO exec. Changing all aspects of digital and cyber. #CTO #CIO. My pers. acct.
Rizwan On Mars @RizwanOnMars
19 Followers 43 Following Capturing interesting photons during my Earthly travels. All photos taken by me on the planet Earth (unless otherwise noted).
Gene Spafford @TheRealSpaf
6K Followers 525 Following Also @[email protected] on Mastodon See https://t.co/SacFNFhEV6 for other ways to find me as this platform implodes.
Follow CISA's account... @cyber
294K Followers 113 Following This account is not active or monitored. Follow @CISAgov and @CISACyber for the latest updates.
Infosecurity Magazine @InfosecurityMag
250K Followers 859 Following The only magazine dedicated to the strategy and technology of information security, delivering critical business and technical information for IT professionals.
CyberWire Daily, by N... @thecyberwire
40K Followers 821 Following The CyberWire Daily podcast and briefing deliver concise news & analysis for the busy cyber professional Monday - Friday. Listen and subscribe today.
stewartbaker @stewartbaker
2K Followers 208 Following
Jay Healey @Jason_Healey
10K Followers 2K Following Personal account - he/him. @ColumbiaSIPA. Founder of Cyber 9/12 student competition. AF Veteran, White House. Review board @BlackHatEvent @defcon
Paul Rosenzweig (@Ros... @RosenzweigP
15K Followers 1K Following Homeland security consultant; Cyber renaissance man; rugby referee; grandparent; uncle; art lover; Nats fan.
The Citizen Lab @citizenlab
118K Followers 1K Following Academic research unit at @UofT investigating novel threats to democracy, human rights, and global security in the digital ecosystem.
profdeibert @RonDeibert
23K Followers 3K Following Director @citizenlab, @munkschool, @uoft. OUT NOW: Chasing Shadows (https://t.co/K61e3qMTk3)
The SecDev Group @SecDev
3K Followers 794 Following We help clients solve wicked problems in the world's most challenging digital and off-platform environments.







