beist @beist
Retired security engineer but still hacking when free+beer Seoul, Korea Joined December 2008-
Tweets4K
-
Followers7K
-
Following280
-
Likes466
@OwariDa @HackingForSoju Yeah! I really miss those days too.
@tylerni7 Even as an individual researcher, I’m finding so many bugs using AI with just my part-time efforts. I don't know whether to be happy or worried—it’s actually making me skeptical. AI will only accelerate, and automated bug-hunting platforms are going to be insane.
SPR was designed specifically to eliminate these attacks. Almost all other WiFi deployments carry inherent disconnects between L2/L3 that enable MITM attacks and packet injection, whether EAP-TLS or WPA3.
This seems bad for WiFi encryption: arstechnica.com/security/2026/…
Reminder we are looking for talented security researchers in all areas (iOS, Android, Browser, 0click, AI) 🚀🚀 DM me or shoot us an email at catalystsecurity.com 🦊
@alfiecg_dev I came across an article about your talk - dailysecu.com/news/articleVi… I wasn’t able to attend PoC this time, so I couldn’t listen to your talk. Will the slides be released soon? And is the content mostly the same as what you’ve written on your blog?
@5aelo I was hoping to see your presentation in person this time, but unfortunately I won’t be able to attend the PoC. I’ll look forward to your slides!
@seanhn I found chairs with wheels, though they don’t have armrests. There’s Solo Booth at Starbucks Circles Ginza. I haven’t visited it yet, but I’m planning to check it out soon. Seems nice! tokyoweekender.com/japan-life/sta…
Anyone knows if there are any coworking spaces in Tokyo where the HotDesk (daily pass) seats come with chairs that have wheels and armrests? It would be even better if they also provide external monitors. At WeWork, I noticed HotDesk doesn’t have those kinds of chairs. Thank you!
I keep up with security news, and I feel the itch to dive back into full-time research—but for now, I’m just enjoying the present. Haven’t really touched computers much, but lately I’ve been hacking about a few hour a week. Using AI to hunt for crashes is still a lot of fun.
Can’t believe it’s already been 6 months since I retired. Life after retirement hasn’t been about being “productive,” but about finally using my time however I want. Starting next month I’ll be in Japan, then heading over to Europe and Bangkok, I guess.
🔺iPhone models announced today include Memory Integrity Enforcement, the culmination of an unprecedented design and engineering effort that we believe represents the most significant upgrade to memory safety in the history of consumer operating systems. security.apple.com/blog/memory-in…
@tylerni7 @theori_io You guys really showed outstanding performances!
These days, when I see the results of bug hunting using AI, I truly feel glad that I retired early. Theori at aixcc: theori.io/blog/exploring… Google big sleep: issuetracker.google.com/issues?q=compo… Xbow: xbow.com/blog/top-1-how…
@ifsecure Good news, but if there had been security engineer positions at Google Korea as well, there would have been many applicants!
As a New Year resolution, consider applying to Project Zero :)
It doesn't happen very often, but Project Zero is hiring! goo.gle/41DBQBY Please share with anyone you think would be awesome for the role 🎉 Looking for at least one person. DMs open if you want to reach out about the role. The team: youtu.be/My_13FXODdU
The Parallels VM escape bug reminds me of a bug I reported to VMware about two years ago. I was waiting until a patch was released before posting, but I ended up forgetting. Just an LPE bug on the host side, feel free to check it out if you're curious. (A colleague of mine forgot his MacBook password, so I discovered the bug in order to read the admin hash and crack it. He made a 'guest' account luckily before.) The diagram might look ugly, tho. PoC is available if you want, but it's a simple logic bug, so easy to exploit.
@cocaas Yeah, AI is stealing my money.. Cursor, ChatGPT, Claude.
For a new setup (Mac mini and LG Dual-up display), I spent some hours and it’s pretty nice! Cursor so much helped me out crash prl_vm_app on the host side (Parallels VM escape). Have not finished the exploit yet but it’s likely exploitable. (Sorry, the cables are still messy.)
Halvar Flake @halvarflake
45K Followers 3K Following Choose disfavour where obedience does not bring honour. I do math. And was once asked by R. Morris Sr. : "For whom?" @[email protected]
mdowd @mdowd
33K Followers 754 Following Internet Hacker. Founder of @vigilant_labs. Previously, co-founder of Azimuth Security (now L3Harris Trenchant)
Richard Johnson @richinseattle
19K Followers 3K Following Computer Security, Reverse Engineering, and Fuzzing; Training & Publications @ https://t.co/mloVP6rPB7; hacking the planet since 1995; Undercurrents BOFH
thaddeus e. grugq @thegrugq
128K Followers 420 Following Hacker :: PhD researcher @warstudies @KingsCollegeLon :: [email protected] :: PGP https://t.co/dYipV8y3bo
Ivan Fratric 💙💛 @ifsecure
19K Followers 209 Following Tech lead and security researcher at Google Project Zero. Author: Jackalope, TinyInst, WinAFL, Domato. PhD. Tweets are my own. Backup @[email protected]
RPW: @[email protected]... @esizkur
8K Followers 890 Following
Justin Elze @HackingLZ
71K Followers 5K Following CTO @TrustedSec | Former Optiv/SecureWorks/Accuvant Labs/Redspin | Race cars
b33f | 🇺🇦✊ @FuzzySec
33K Followers 1K Following 意志 / mobile research @ ▓▓▓▓▓ / Team 501 / ex IBM Capability Lead & FireEye TORE / I rewrite pointers and read memory / AI Psychoanalyst / Teaching @CalypsoLabs
𝗥𝗬𝗔𝗡 𝗦... @withzombies
3K Followers 1K Following "im not distilled! im not distilled!!", i continue to insist as i slowly shrink and transform into a prompt
fG! @osxreverser
12K Followers 789 Following Know a thing or two about Reverse Engineering and Economics. Love 911s with three pedals and natural aspirated engines.
Jordan Wiens @psifertex
6K Followers 1K Following Worst developer among many good ones making https://t.co/XCCx7ED5uf
chrisrohlf @chrisrohlf
11K Followers 925 Following Waging algorithmic warfare since 2003. Engineer, Researcher. MTS @ Anthropic, Non-Resident Research Fellow @CSETGeorgetown CyberAI
Samuel Groß @5aelo
25K Followers 524 Following Working on Project Zero, Big Sleep, and V8 Security. Personal account. Also @[email protected] and https://t.co/aVitnPjBie
Stefan Esser @i0n1c
108K Followers 462 Following CEO of @Antid0tecom (former CEO of @SektionEins) (contact: [email protected])
INSU YUN @insu_yun
2K Followers 603 Following Associate Professor (Untenured) at KAIST EE #KAIST #HackingLab #GoN
eQuiNoX @eQuiNoX__
364 Followers 314 Following
Anti-Anti-Rev-Evoluti... @elfexecutieble
96 Followers 1K Following I do this not because it is easy, but because I thought it would be easy... Yeah man like what even are computers and why they need to be secure ( ‘• ω • `)?
downbtn @downbtn_
104 Followers 3K Following
Ant Burton @apburton84
34 Followers 541 Following Data Sorcerer 🧙♂️ Unleashing powerful insights as a Lead Data Scientist. Let's make data magic! ✨
MAk @BugBountyBeast
7 Followers 1K Following
Johnny Youtuber @johnny_y74147
1 Followers 47 Following
Bert Steen @bertsteen2
363 Followers 871 Following food manufacturing, aquaculture, oil field, friend of Bill, What next?
nothing is everything @IsEv3ryth1ng
1 Followers 390 Following
STEVE.HACKS.THINGS. @SteveLINY
1K Followers 890 Following Breaking products you know & love for the betterment of humanity. Opinions made under duress & not those of my employer, family, friends or myself. Send help.
AISecHub @AISecHub
9K Followers 7K Following 🚀 AISecHub | AI & Cybersecurity | Securing AI systems, and sharing insights on emerging challenges | https://t.co/YeYtqq5tJC
Satar @satar_nz
586 Followers 7K Following
Ashish Pathak @bhola_baba_ji
1 Followers 37 Following
X G @itsxgan
1 Followers 893 Following
CTRL_ALT_DELEET @CTRL_ALT_DLEET
2 Followers 449 Following
vin0x00a2 @vin0x00a2
33 Followers 3K Following
T1nt1n @t1nt1nsn0wy
677 Followers 5K Following Noobie H4CK3R and researcher at @qualys. Prev @pwc. Views are my own :)
jon @JonofFive
168 Followers 3K Following
Johnny @Luckyrocky2028
251 Followers 7K Following Stay Hungry, Stay Foolish. Only those who are self-disciplined can attain true freedom.｜No Politics.
溴化锂 @0x88FFA357
2K Followers 1K Following
Supernetworks, Inc @spr_networks
281 Followers 236 Following 📡 Open Source, secure, user friendly and fast wifi routers @ home - One wifi password per device - Easy policy based network access - DNS Ad Blocking & Rules
Scott Bowen @Scott_Bowen
251 Followers 4K Following
eth @KHL_ETHA
10 Followers 3K Following
eljsl @eljsl
5 Followers 99 Following
Lily156579845463 @Lily87467470
21 Followers 2K Following The secret of being happy is to accept where you are in life and making the most most out of everyday.
Lily749613131 @lily749613131
8 Followers 3K Following The secret of being happy is to accept where you are in life and making the most most out of everyday.
nemo @JosephKanko4
208 Followers 3K Following Passionate about Ethical Hacking | CTF Player | I explore the vulnerabilities
0xb1n4ry @0xb1n4ry
0 Followers 866 Following
ayoub77 @ayou18800
5 Followers 126 Following
NANA @sniff2345
0 Followers 159 Following
PoiuLkjh @PoiuLkj97148459
31 Followers 3K Following
FØRSETI @lll13llll
78 Followers 768 Following
hudson @hudson112824
4 Followers 184 Following
^.Machtmensch @_foobarr
25 Followers 2K Following
kuzushi @kuzushi
2K Followers 637 Following guadalajajaja offensive ai @bugcrowd phd candidate @udegcucei board: @cactuscon @hackgdl ex: @bishopfox @spiderlabs opines are mine - sola gratia
Thomas King - @thomas... @ThomasKing2014
2K Followers 502 Following Android/Browser Vulnerability Research, Reverse Engineering. Mastodon: @[email protected]
Lan Vu 🇻🇳 @lanleft_
2K Followers 498 Following she/her | coffee delivery at Qrious Secure @qriousec |
cit @kyugyusinn
2 Followers 226 Following
Garrett @RuorongGuo
10 Followers 623 Following Heterogeneous computing system enthusiast. Always enjoy finding out how systems work. The 3rd-year graduate @ZJU_China. Looking for PhD/RA opportunities.
chompie @chompie1337
89K Followers 1K Following hacker, exploit developer/weird machine mechanic head of X-Force Offensive Research (XOR) @IBM
Halvar Flake @halvarflake
45K Followers 3K Following Choose disfavour where obedience does not bring honour. I do math. And was once asked by R. Morris Sr. : "For whom?" @[email protected]
mdowd @mdowd
33K Followers 754 Following Internet Hacker. Founder of @vigilant_labs. Previously, co-founder of Azimuth Security (now L3Harris Trenchant)
lcamtuf @lcamtuf
40K Followers 499 Following Substack: https://t.co/yFvmNisGW3 Homepage: https://t.co/iFAXZxCO5H
Richard Johnson @richinseattle
19K Followers 3K Following Computer Security, Reverse Engineering, and Fuzzing; Training & Publications @ https://t.co/mloVP6rPB7; hacking the planet since 1995; Undercurrents BOFH
thaddeus e. grugq @thegrugq
128K Followers 420 Following Hacker :: PhD researcher @warstudies @KingsCollegeLon :: [email protected] :: PGP https://t.co/dYipV8y3bo
Ivan Fratric 💙💛 @ifsecure
19K Followers 209 Following Tech lead and security researcher at Google Project Zero. Author: Jackalope, TinyInst, WinAFL, Domato. PhD. Tweets are my own. Backup @[email protected]
RPW: @[email protected]... @esizkur
8K Followers 890 Following
Trail of Bits @trailofbits
38K Followers 259 Following We help secure the world’s most targeted organizations and products. We combine security research with an attacker mentality to reduce risk and fortify code.
Thomas H. Ptacek @tqbf
35K Followers 618 Following Don't look at me sideways. Don't even look me straight on. bsky:@sockpuppet.org
fG! @osxreverser
12K Followers 789 Following Know a thing or two about Reverse Engineering and Economics. Love 911s with three pedals and natural aspirated engines.
Dino A. Dai Zovi @dinodaizovi
39K Followers 1 Following Dino is human and can make mistakes. Please double-check responses.
Jordan Wiens @psifertex
6K Followers 1K Following Worst developer among many good ones making https://t.co/XCCx7ED5uf
chrisrohlf @chrisrohlf
11K Followers 925 Following Waging algorithmic warfare since 2003. Engineer, Researcher. MTS @ Anthropic, Non-Resident Research Fellow @CSETGeorgetown CyberAI
Samuel Groß @5aelo
25K Followers 524 Following Working on Project Zero, Big Sleep, and V8 Security. Personal account. Also @[email protected] and https://t.co/aVitnPjBie
johnny @zeroxjf
4K Followers 175 Following iOS & MacOS Researcher (AI-Assisted) @trycua https://t.co/4vu4rvK5b5
Charles Edwards @caprioleio
133K Followers 715 Following Investor and founder. @Capriole_fund Posts not investment advice.
Supernetworks, Inc @spr_networks
281 Followers 236 Following 📡 Open Source, secure, user friendly and fast wifi routers @ home - One wifi password per device - Easy policy based network access - DNS Ad Blocking & Rules
Christian Blichmann �... @AdmVonSchneider
2K Followers 599 Following Everything is always broken. Googler by day. #BinDiff maintainer. My tweets, my opinion. During my lifetime, CO2 increased by 67.84ppm (so far).
Ivan Krstić @radian
12K Followers 869 Following Head of Security Engineering+Architecture (SEAR) at Apple. I don’t speak for my employer.
Open Source Intel @Osint613
1.5M Followers 1K Following Monitoring Real-Time News & Open Source Intelligence • Middle East • US • World • Geopolitics Analysis • Commentary • On The Ground • Signal Tips: Osint.613
CrediBULL Crypto @CredibleCrypto
482K Followers 3K Following *Tweets are my opinion, not financial advice* Only on X- be careful of impersonators. WILL NEVER DM YOU FOR MONEY. NO PAID SERVICES.
George Hotz 🌑 @realGeorgeHotz
304K Followers 204 Following President @comma_ai. Founder @__tinygrad__
Bernardo Quintero @bquintero
25K Followers 269 Following Founder of @virustotal 📖 INFECTED: https://t.co/RRguFlNWKR 📖 INFECTADO: https://t.co/WZ5C2U5ymR
Steven V. @bool101
1K Followers 890 Following
Stefan Friedli @stfn42
6K Followers 658 Following Running the Red Team at @Google, PTES author, Area41 organizer. Opinions are my own. Tweets auto-expire. (He/Him)
Stefano Zanero @raistolo
19K Followers 2K Following Tinkerer, security geek, recovering entrepreneur, full professor @polimi, frequent flyer, pilot (follow https://t.co/19HknsE6EE). He/him 🏳️🌈
Junghoon Lee @lokihardt
2K Followers 0 Following
Ofri Ziv @OfriZiv
282 Followers 157 Following
Bitcoin Archive @BitcoinArchive
1.8M Followers 1K Following BITCOIN NEWS & ANALYSIS 📺 YOUTUBE: https://t.co/mVGviKEZmY 🍏 APPLE: https://t.co/gGsOvYRUnW 🎙️ SPOTIFY: https://t.co/2GQuNnZFL9
Michael Saylor @saylor
5.1M Followers 818 Following Bitcoin is https://t.co/KbbYe74DgB | $BTC Hodler | @Strategy Founder & Chairman | bio https://t.co/9Zlq0oHYnP | free education https://t.co/4L1s0ix7FE | $MSTR $STRC
Julien Vanegue @jvanegue
6K Followers 986 Following CTO Office / Head of Infra & Security Research @Bloomberg. Interested in mathematical techniques for software, systems, and network analysis at world scale.
Lazenca.0x0 @0x0Lazenca
39 Followers 35 Following
hugeh0ge @hugeh0ge
2K Followers 394 Following have been playing CTFs as binja leader (DEFCON Finals'14 '16 '18 '20 '22 '23 '24 '25; Google Finals'17) and competitive programming also(ICPC WF'19 '20)
LINE Developers @LINE_DEV
13K Followers 25 Following 【今後の新アカウント → @lycorptech_jp】 LINEの技術関連情報を発信する公式アカウント。提供するAPI/OSSや開催するイベント、エンジニアブログの記事公開などの情報をお知らせします。 EN: https://t.co/bHcSmQSLNk
Nikolay Elenkov @kapitanpetko
2K Followers 1K Following
Adam Doupé @adamdoupe
6K Followers 1K Following Former DEF CON CTF organizer. Professor @ASU. Web, system, and network security. Loves CTFs. Hacks w/ @shellphish. Hosts @ctfradiooo. Open DMs.
Vitaly Kamluk @vkamluk
4K Followers 461 Following POP, NOP and ROP walk into a bar. Follow me on Mastodon: https://t.co/sKz7VC2unX
Zuk @ihackbanme
17K Followers 1K Following Mobile & Security Research | Founder @ZecOps (Acq. by JAMF) 🐊 & @ZIMPERIUM (Acq.) | #FreeTheSandbox✌ | ❤️ Chess | My random thoughts, only some are accurate.
Anton Cherepanov @cherepanov74
4K Followers 978 Following Malware researcher at ESET Slovakia. Opinions are my own.
🐘 @therealsaumil@i... @therealsaumil
8K Followers 2K Following Hacker. Speaker. Trainer. Entrepreneur. Traveler. Photographer. Calligrapher. Kite-flyer. Rebel. Made in India 🇮🇳 (vi/vim)
Alex Matrosov @matrosov
20K Followers 2K Following Security REsearch @Anthropicai · Breaking & Fixing AI Failure Modes | Founder @binarly_io · @SBOM_Tools · @REhints | Author “Rootkits & Bootkits" (https://t.co/1wd2dfYHY6)
Chris Wysopal @WeldPond
55K Followers 1K Following Hacker. Co-founder Veracode. Former L0pht security researcher. GenAI Auto-repair of vulns is the future
Michael Ossmann (@mos... @michaelossmann
15K Followers 844 Following hacker/artist/gadgeteer, Great Scott Gadgets (@GSGlabs) founder, designer of GreatFET, HackRF, Ubertooth. You think I should be @mossmann, but I'm not. he/him
Olivier THOMAS @reivilo_t
2K Followers 447 Following Founder & CTO at Texplained. Technology enthusiast & silicon hacker
Dmitry Nedospasov @nedos
7K Followers 328 Following 🚀 Building next-gen AI systems 💎 Auditing Web3's heavy hitters @keylabsio, ex- @walletfail 🎓 PhD in Security Training @advsecioYou might like
