Umut Barış Öztunç @umutoztunc
OS Security Engineer at Apple / CTF player at r3kapig pwndiary.com Cupertino, California Joined May 2011-
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See you guys in Las Vegas!!!! We qualified for DEFCON CTF 2025. defcon.social/@nautilusinsti…
Last weekend we play with @C4TBuTS4D and few ppl from Bushwackers and MSLC as [pinely] RePokemonedCollections.Finally we got 4th. This is our best result ever.Hopewe could do better next year!
🔺New on the Apple Security Research blog: introducing PQ3, a groundbreaking post-quantum cryptographic protocol for iMessage. To our knowledge, PQ3 has the strongest security properties of any at-scale messaging protocol in the world. security.apple.com/blog/imessage-…
New write-up on an Intel Ice Lake CPU vulnerability, we can effectively corrupt the RoB with redundant prefixes! 🔥 An updated microcode is available today for all affected products, cloud providers should patch ASAP. lock.cmpxchg8b.com/reptar.html
🔺New on the Apple Security Research blog: a brief technical overview of iMessage Contact Key Verification! security.apple.com/blog/imessage-…
🔺New on the Apple Security Research blog: we pit our hardened kalloc_type XNU allocator against SockPuppet, a powerful vulnerability from the past: security.apple.com/blog/what-if-w…
After two days of hard work over the weekend, we have completed a lot of real estate commissions with C4T BuT S4D. We are qualified to compete with other excellent teams. see you in Las Vegas 😍
Our paper got accepted at #CVPR2023! (w/ @yu_takagi) We modeled the relationship between human brain activity (early/semantic areas) and Stable Diffusion's latent representations and decoded perceptual contents from brain activity ("brain2image"). sites.google.com/view/stabledif…
Defcon CTF 2022 🎉🎉🎉 Good job everyone! Thanks for hosting the game and the party! @defcon
Exploiting reference counter of quickjs in TCTF 2021 Final: mem2019.github.io/jekyll/update/…
TCTF 2021 2nd place 🎉🎉🎉
Anyone into QEMU? Can we finally get memory maps into GDB? Any hints for doing this? lists.nongnu.org/archive/html/q… ;)
Have you tried my GUI, angr-management, lately? I recently gained some great features like a hex viewer, view synchronization, color schemes, and more! Find it at github.com/angr/angr-mana…
My suggestions to Apple: (1) talk to the technical and policy communities before you do whatever you’re going to do. Talk to the general public as well. This isn’t a fancy new Touchbar: it’s a privacy compromise that affects 1bn users. 1/
Actually, it just requires ubuntu fonts to run. It is because pygame's font loader has a small bug. We got it running on arch by installing tff-ubuntu-font-family, and on gentoo by installing media-fonts/ubuntu-font-family.😛
Actually, it just requires ubuntu fonts to run. It is because pygame's font loader has a small bug. We got it running on arch by installing tff-ubuntu-font-family, and on gentoo by installing media-fonts/ubuntu-font-family.😛
If you are free on Aug 28-29th, you should definitely consider playing this CTF.
If you are free on Aug 28-29th, you should definitely consider playing this CTF.
Last week I played UIUCTF 2021. There was an unsolved challenge named Simply Perfect that organizers put bounty on it. I claimed both challenge and write-up bounties. Here is my write-up on it. pwndiary.com/uiuctf-2021-si…
I have attempted to solve Weather in Google CTF 2021 and failed to solve it during the CTF. I think it was a challenge worth making a write-up. So, here is my write-up on it. pwndiary.com/google-ctf-202…
Here is my write-up for pypypypy in 0CTF/TCTF 2021. This challenge was super fun! pwndiary.com/0ctf-2021-pypy…
I always get angry replies when I say "use a password manager" is bad advice, but I stand by that! Here are some weekend thoughts about it lock.cmpxchg8b.com/passmgrs.html (tl;dr just use chrome!) 😆
🙌🙌❤️ @Noogerf729
0 Followers 71 Following
😘😘😘 @Twirqlor223040
0 Followers 84 Following
Osman Eren Güneş @osman1337_
429 Followers 307 Following TAU Computer Eng. - Security Researcher @Hacker0x01 - https://t.co/gL51E723O9
Arda Ay @Query1337
61 Followers 398 Following
YuriNeko @Yuri_Nek0
4 Followers 21 Following Computer Science enthusiast | Member of @r3kapig | Student at @Sydney_Uni | My blog: https://t.co/aR6JhRSiMl
ShellM1ng @ShellM1ng
9 Followers 134 Following windows reversing and android security lover Android kernel
zh1x1an1221 @zh1x1an1221
933 Followers 307 Following Bug bounty hunter | 2024 Top 20 Chrome VRP Researcher｜Web3 smart contract auditor | prev Ant Security Tianqiong Light-Year Lab
Kağan IŞILDAK @kaganisildak
4K Followers 2K Following co-founder @malwation @threatzone_ :: [email protected] building holistic platforms to analyze malware
0x4b564b @0x4b564b
45 Followers 829 Following reverse engineer, malware analyst, exploit development, binary exploitation
Str1Lets @Str1Lets
1 Followers 97 Following
APTzatziki @GeKarantzas
2K Followers 2K Following George Karantzas. - Est. 2001. - BSc Student@UniPi. - Opinions are my own.
ABİ @MythScapegoat
94 Followers 319 Following
Rajvardhan Agarwal @rajxnull
7K Followers 378 Following Vulnerability Researcher @Apple | CTFer forever: @SuperGuesser | Opinions my own
kolten @Merl1ng
122 Followers 4K Following
Flo skyOSINT @skytimesx64
810 Followers 3K Following #coding #infosec #ctf dev x poly #sports chasing the #forces of nature Libéralité Philosophie
william shakespeare @zubatbate
18 Followers 1K Following
Deneme @Deneme14192050
1 Followers 620 Following
ylzs @ylzs__
10 Followers 372 Following
Celil ÜNÜVER @celilunuver
5K Followers 1K Following The world of bytes and bits, the beauty of binary. senior director of eng @sonicwall, ex-founder @trapmine (acq.) - tweets are my own.
Xinyu Xing @xingxinyu
1K Followers 1K Following Associate Professor@Northwestern University. lead of 42-b3yond-6ug. Many Ph.D./internship/visiting scholar openings in software/system security. DM/email me.
sere @x168725386
53 Followers 2K Following
swing @bestswngs
3K Followers 424 Following Security Researcher Focus on PWN/Reverse https://t.co/OFy100ZZri Blog: https://t.co/yRv3acwHEJ
genjej @zenaiqr
7 Followers 187 Following
n0zk @n0zk__
171 Followers 2K Following Purple teamer | Privacy fighter | A lazy CTF player | I build, make and break weird stuff
Yavuz Kömeçoğlu @YavuzKomecoglu
4K Followers 2K Following Founding Engineer at ThinkVoice | R&D Engineer & AI Researcher at Kodiks
_0x0_ @CS_0xFFFFFFFF
217 Followers 695 Following
Disconnect3d @disconnect3d_pl
3K Followers 691 Following Security Engineer at @trailofbits. Pwndbg maintainer, justCatTheFish CTF team captain. Opinions are my own =)
crazyman_army @CrazymanArmy
6K Followers 3K Following CTFer / APT hunter / RedTeam / BlueTeam the member of @r3kapig the leader of @ShadowChasing1 CVE-2022-30190 find job opportunities opinions are own not group
Ulaş Anıl @_ulasanil
524 Followers 472 Following Smart Contract Auditor @nethermindsec + appsec enjoyer ex @Bugcrowd @rootstock_io
Shadow Chaser Group @ShadowChasing1
11K Followers 569 Following Shadow Chaser Group is a sub-group of the GcowSec team which consists of college students who love it.Shadow Chaser Group focused on APT hunt and analysis
zh1x1an1221 @zh1x1an1221
933 Followers 307 Following Bug bounty hunter | 2024 Top 20 Chrome VRP Researcher｜Web3 smart contract auditor | prev Ant Security Tianqiong Light-Year Lab
Rajvardhan Agarwal @rajxnull
7K Followers 378 Following Vulnerability Researcher @Apple | CTFer forever: @SuperGuesser | Opinions my own
Ivan Krstić @radian
12K Followers 869 Following Head of Security Engineering+Architecture (SEAR) at Apple. I don’t speak for my employer.
Leonardo Galli @galli_leo_
478 Followers 218 Following
Disconnect3d @disconnect3d_pl
3K Followers 691 Following Security Engineer at @trailofbits. Pwndbg maintainer, justCatTheFish CTF team captain. Opinions are my own =)
Matthew Green is on B... @matthew_d_green
150K Followers 1K Following I teach cryptography at Johns Hopkins. Mostly on BlueSky these days at https://t.co/GI4QlxZr2S.
RBTree @RBTree_
2K Followers 435 Following Rev & Crypto | CTF @pb_ctf | DEF CON CTF 2017-2025 Finalist
Stefan Friedli @stfn42
6K Followers 670 Following Running the Red Team at @Google, PTES author, Area41 organizer. Opinions are my own. Tweets auto-expire. (He/Him)
crazyman_army @CrazymanArmy
6K Followers 3K Following CTFer / APT hunter / RedTeam / BlueTeam the member of @r3kapig the leader of @ShadowChasing1 CVE-2022-30190 find job opportunities opinions are own not group
Shadow Chaser Group @ShadowChasing1
11K Followers 569 Following Shadow Chaser Group is a sub-group of the GcowSec team which consists of college students who love it.Shadow Chaser Group focused on APT hunt and analysis
Zhongyu Pei @BrieflyX
698 Followers 205 Following Security researcher from Alibaba Inc. / Tsinghua University CTF player of Tea-deliverers / Blue-lotus Fuzzing / Binary Analysis
nedwill @NedWilliamson
16K Followers 558 Following Tesla {Autopilot, Dojo}; Previously Google Project Zero; PPP for life; SockPuppet, Soundhax, Speedcubing
Robert Swiecki @robertswiecki
4K Followers 359 Following AI Systems Security Lead at Google. Personal profile - opinions are my own. [email protected]
ebeip90.cc @ebeip90
3K Followers 780 Following Security Engineering & Research / Xoogler / CTF dude. Tweets are my own opinion.
stacksmashing @ghidraninja
48K Followers 452 Following Security researcher with a focus on hardware & firmware. I occasionally publish stuff on YouTube. Co-founder of @hextreeio. Contact: [email protected]
Chromium Disclosed Se... @BugsChromium
8K Followers 0 Following Tweets publicly disclosed bugs in Chromium. Not an official Google product. Run by @SecurityMB. Mastodon: @[email protected]
Edward Snowden @Snowden
5.7M Followers 1 Following I used to work for the government, but now I work for the public.
cts🌸 @gf_256
61K Followers 838 Following Co-founder and hacker @zellic_io & @pb_ctf | https://t.co/nlNai6iiMP | 24 Intern @egirl_capital slow to reply to DMs
ptr-yudai @ptrYudai
6K Followers 349 Following 🍣🍣🍣 https://t.co/5OmzwCTPea 🍣🥺🍣 @zer0pts の猫 🐯 🍣🍣🍣 https://t.co/5OmzwCTPea
Jiantao Li @CurseRed
2K Followers 395 Following Security Researcher @starlabs_sg , playing CTF with @r3kapig
Halil Samed Çıldır @samedcildir
154 Followers 330 Following
MalwareTech @MalwareTechBlog
277K Followers 1 Following Not here anymore. Profiles: https://t.co/sFoOuGmYK2
FeDEX @FetchDEX
1K Followers 1K Following { Christian Hacker } { @WreckTheLine } { Blockchain Security @osec_io 🦦 } { building @aisafe_io }
Ivan Fratric 💙💛 @ifsecure
18K Followers 207 Following Security researcher at Google Project Zero. Author: Jackalope, TinyInst, WinAFL, Domato. PhD. Tweets are my own. Backup @[email protected]
Calle Svensson @ZetaTwo
7K Followers 711 Following Security Engineer @ XTX. MSc in eng. physics & CompSci, dev & gamer. ❤️ music & long distance running. Wanna do a PhD sometime. Same U/N on all other sites
Can Bölük @_can1357
7K Followers 259 Following Security researcher and reverse engineer. Interested in Windows kernel development, low-level programming, static program analysis and cryptography.
Binni Shah @binitamshah
141K Followers 165 Following Linux Evangelist, Malwares, Security enthusiast , Investor, Contrarian , Philanthropist , Reformist , Sigma female 🦋 https://t.co/WOvf41tMKV
Azeria @Fox0x01
122K Followers 597 Following Sneaky bit flipper | CEO @azeria_labs | Author of “Arm Assembly Internals & RE” @BlueFoxBook | Adjunct Professor @SAISHopkins | Forbes 30u30
Rolf Rolles @RolfRolles
14K Followers 357 Following Static reverse engineering, deobfuscation, program analysis and formal verification, training, mathematics, compilers, functional programming, etc.
Cüneyt Zor @cuneytzor
2K Followers 602 Following Hakkari Vali Yardımcısı / İl Özel İdaresi Genel Sekreteri
Gal Z @0xgalz
6K Followers 433 Following Security Researcher. Reverse Engineering 💙 Vulnerability Research 💜 Embedded 🤖 C++🤩 OS Internals 🤍 Sewing🧵 Classical Music🎼 Opinions are my own.
Oryan De Paz @OryanDP
3K Followers 458 Following Interested in infosec, especially in Windows Internals 💙 Reverse Engineering 💚 and CTFs ❤ (oh and did I mention Windows Internals already? 😉)
Yarden Shafir @yarden_shafir
24K Followers 311 Following A circus artist with a visual studio license
Natalie Silvanovich @natashenka
45K Followers 2K Following Tamagotchi Hacker. Google Project Zero. She/her.
ohjin @pwn_expoit
4K Followers 446 Following I'm still hungry. I will be world-class, @[email protected]
Gengming Liu @dmxcsnsbh
4K Followers 157 Following Security Researcher at @SingularSecLab. Winner of DEFCON 28 CTF, Pwn2Own, Pwnium.
Malware Unicorn @malwareunicorn
168K Followers 4 Following Mostly on @malwareunicorn.bsky.social @Straikerai. Ex-Microsoft. Ex-Meta.
sakura @eternalsakura13
8K Followers 190 Following Lead Security Researcher @zellic_io. 2022-2024 Top 3 Chrome VRP. 2023 Top 2 Facebook Whitehat. 2025 MSRC MVRs 9th. BlackHat Asia/USA & Zer0Con speaker.
NightShadow @NightShadowNSYY
455 Followers 242 Following Security researcher at @XuanwuLab. CTF player at @r3kapig.
Murat Karademir 🍊�... @muratkun
3K Followers 2K Following Co-Founder @chainway_xyz | Building @citrea_xyz 🍊 | #Bitcoin 's First ZK Rollup
Samuel Groß @5aelo
24K Followers 502 Following Working on Project Zero, Big Sleep, and V8 Security. Personal account. Also @[email protected] and https://t.co/aVitnPjBie
swing @bestswngs
3K Followers 424 Following Security Researcher Focus on PWN/Reverse https://t.co/OFy100ZZri Blog: https://t.co/yRv3acwHEJ
Diane Dubois @0xdidu
2K Followers 407 Following Senior Security Engineer @Google (opinions expressed here are my own). Vulnerability research on systems is my favorite playground. Windows enthusiast. She/herTrends for United States
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