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Awesome Security accounts on Mastodon.

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Bettina Hartmann
@[email protected]
Last posted 1 day ago
Posts 987
Followers ▼ 6
Following 437
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Secure decentralized messaging across all major platforms. Instant and reliable via fast chatmail relays, compatible with classic email providers. Features secure mini web apps for fun and collaboration, end-to-end encrypted and with P2P realtime channels. Security-audited multiple times.

Last posted 1 day ago
Posts 2,626
Followers ▼ 6
Following 613
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heise Security
@[email protected]

News und Hintergrund-Geschichten von heise Security - dem Sicherheitsportal von heise online.

Offizieller Account
🤖 Die meisten Posts sind automatisiert

heise.de/security/impressum.ht

Last posted 1 day ago
Posts 3,935
Followers ▼ 6
Following 0
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D̒͂̕ᵈăᵃn̕ᶰ Ť̾̾̓͐͒͠ᵗe͗̑́̋̂́͡ᵉn̅ᶰtᵗl̀̓͘ᶫe̓̒̂̚ᵉrʳ
:: Founder, Phobos Group
:: Quad Flooper :: Scoville Addict
:: Public Speaker :: food pornographer
:: Twitter Alum (2011-2012)
:: security histrionics
:: finance histrionics
:: tattoo'ed nerd
:: security longhair

part george carlin, part bill hicks, part robin williams.
I run a tiny security consulting company, make hotsauce, watch cartoons and figured out how to weaponize home assistant. I found 118 dollars of btc in my garage.

Last posted Less than a day ago
Posts 59,223
Followers ▼ 5
Following 723
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Auth Updates Bot
@[email protected]

A friendly bot posting security updates from 2fa.directory, passkeys.2fa.directory, and passkeyindex.io. Run by @timonus.

Last posted Less than a day ago
Posts 329
Followers ▼ 5
Following 1
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COSIC provides a broad expertise in digital security and strives for innovative security solutions.
COSIC is headed by Bart Preneel.

Computer Security and Industrial Cryptography group
esat.kuleuven.be/cosic/

Last posted 1 day ago
Posts 924
Followers ▼ 5
Following 30
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Open Security Conference
@[email protected]

Welcome to the official account of the Open Security Conference (#osco), the people-centred international gathering for everyone interested in cybersecurity.

Osco presents a different concept of security conference - literally from the community, for the community! It offers a platform to ease the learning curve in cybersecurity and provides the opportunity to learn, discuss, and teach.

is over. awaits!
Join us November 5-8, 2026 in Rückersbach, Germany. Visit our website to learn more, and follow to stay up-to-date.

Run by @0xKristof, @cisokeener, Daniel, @hans, @Gronner (gr), @IsItArtOrTrash, Kush, @lisihocke (lisi), @nazneenr, @realn2s (cl), and @seism0saurus (seism0saurus)

Last posted 1 day ago
Posts 390
Followers ▼ 5
Following 29
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modularity, scalability and security for business
searchable

Last posted 1 day ago
Posts 391
Followers ▼ 5
Following 0
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Software developer with a focus on front-end web development.
Working for @9elements, an agency for design, software, firmware and security.

Last posted 1 day ago
Posts 859
Followers ▼ 5
Following 2,602
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InfoSec - work in progress
haecksen Vienna

DE / ENG

Last posted 1 day ago
Posts 66
Followers ▼ 5
Following 225
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Security researcher by day, weird deer lady by night. Big fan of usenet and smolnet and prone to talking in equal measure about Linux and stuffed animals.

She/her

Last posted Less than a day ago
Posts 18,163
Followers ▼ 5
Following 721
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Founder of DEF CON & Black Hat. Maintainer of infocon.org.

Member of the UK Gov Cybersecurity Advisory Board & The Council on Foreign Relations.

Working to get Hackers and Researchers a seat at the Policy table.

I'm interested in hacking, community, technology, privacy, security policy, and the intersection of civil society. (He/Him) Opinions are my own.

Previously member ONCD (2024-2025), CISA Cyber Security Advisory Council (2021-2025), and DHS Advisory Council (2009-2020)

Last posted 1 day ago
Posts 3,847
Followers ▼ 4
Following 1,141
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CHERI Alliance
@[email protected]

A non-profit organisation dedicated to accelerating adoption of the security technology

Last posted 1 day ago
Posts 44
Followers ▼ 4
Following 2
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Matthias Eberl
@[email protected]

Journalist, Educator, Researcher Freelancer e.g. SZ, Netzpolitik, Kuketz-Blog.
🏆 Deutscher Reporterpreis

Account is .

Last posted 1 day ago
Posts 4,343
Followers ▼ 4
Following 496
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Qubes OS is a security-oriented operating system that allows you to compartmentalize your data and activities into isolated environments called "qubes" so that a single cyberattack can't take down your entire digital life in one fell swoop.

Last posted 1 day ago
Posts 219
Followers ▼ 4
Following 0
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David Chisnall (*Now with 50% more sarcasm!*)
@[email protected]

I am Director of System Architecture at SCI Semiconductor and a Visiting Researcher at the University of Cambridge Computer Laboratory. I remain actively involved in the project, where I led the early language / compiler strand of the research, and am the maintainer of the Platform.

I was on the FreeBSD Core Team for two terms, have been an LLVM developer since 2008, am the author of the GNUstep Objective-C runtime (libobjc2 and associated clang support), and am responsible for libcxxrt and the BSD-licensed device tree compiler.

Opinions expressed by me are not necessarily opinions. In all probability they are random ramblings and should be ignored. Failure to ignore may result in severe boredom and / or confusion. Shake well before opening. Keep refrigerated.

Warning: May contain greater than the recommended daily allowance of sarcasm.

No license, implied or explicit, is granted to use any of my posts for training AI models.

Last posted 1 day ago
Posts 11,992
Followers ▼ 4
Following 113
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Creator of @haveibeenpwned. Microsoft Regional Director and MVP. Pluralsight author. Online security, technology and “The Cloud”. Australian.

Last posted 2 days ago
Posts 1,202
Followers ▼ 4
Following 54
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(he/him) Dad / Husband / Marine / Student / Teacher / USMC / Red Team & CTI Director / @hak5 / NoVAHackers / HBO’s Silicon Valley/ Mid-Atlantic CCDC / Marine Cyber Auxiliary

Last posted 1 day ago
Posts 15
Followers ▼ 4
Following 540
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Katrina Katrinka donor
@[email protected]

Six Word Memoir: Clever, creative, and occasionally quite crazy.
I like , , , , , people, politics, , , , , , , , , and a bunch of other random things.
Pronouns: she/her
Searchable, if'n you're a tootfinder.

Last posted Less than a day ago
Posts 2,722
Followers ▼ 4
Following 1,314
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TheHackerWire
@[email protected]

Cybersecurity Chronicles 🌐 | Breaking down the latest in security news,

Last posted 1 day ago
Posts 3,231
Followers ▼ 4
Following 2
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Lost catgirl. Full-stack hacker.

Formerly infosec, professionally. Recovering from deep burnout.

Sometimes refers to ourselves in plural form.

🏳️‍⚧️🏳️‍🌈

Chuuni rights!

♫ Wake up, leave your hesitation ♫

ABC (American-born Chinese) but not in America

Last posted 1 day ago
Posts 5,004
Followers ▼ 4
Following 109