ptr-yudai @ptrYudai Twitter Profile | Xstalk

ptr-yudai

@ptrYudai

🍣🍣🍣 https://t.co/5OmzwCTPea 🍣🥺🍣 @zer0pts の猫 🐯 🍣🍣🍣 https://t.co/5OmzwCTPea Japanese Sushi Hacker (I turn off notification of every SNS/email due to notification anxiety.)

1KPosts 5KFollowers 346Following

Similar User

@pb_ctf

@0rganizers

@_MatteoRizzo

@SuperGuesser

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@l33d0hyun

@5unKn0wn

ptr-yudai Reposted

ptr-yudai

11 Nov

Meet Team Asia! 🎉👏 Worked hard, stayed strong, and delivered an amazing performance at ICC! Hats off to: @ptrYudai @__g0ri__ @_bronson113 @g1n04h @lj1nu @kymn_ @ksprsk_ @lbrnli1234 @maple3142 @_ryuk12345 @push0ebp @st98_ @nyxsorcerer @KaligulaSec @eigen_kye0ng…

ptr-yudai

31 Oct

Congratz @acsc_asia for winning 2nd place in ICC 2024! I liked some pwn in Jeopardy especially. Thank you @TrabodaLabs for making the challenges!

ptr-yudai Reposted

ptr-yudai

31 Oct

Round 6 (Pwn) is this weekend 🍣🍣🍣 alpacahack.com/ctfs/round-6 @ptrYudai

Tweet Image 1

ptr-yudai

21 Oct

We won 1st place in Google CTF Finals Hackceler8🏆 Thank you for the amazing game!

Google VRP (Google Bug Hunters)

20 Oct

[Hackceler8 '24] REMINDER for all CTF enthusiasts: Tune in to our live stream for the finals of Hackceler8, kicking off in 30 minutes (pre-game commentary from 14:15, finals from 14:30 CET). youtube.com/live/LEm1UEjIW…

ptr-yudai Reposted

ptr-yudai

21 Sep

\Talks and Timetable for CODE BLUE 2024 are now released!!📢/ This year's CFP received over 350 applications, and 24 carefully selected sessions will be held. There are many hot topics, including AI, device security, and APT attacks in space! Details▶︎codeblue.jp/2024/time_tabl…

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Time Table – 世界トップクラスの専門家による情報セキュリティ国際会議「CODE BLUE（コードブルー）」

Source: https://t.co/djCWAsqC5H

ptr-yudai

22 Sep

I was in Pescara, Italy to attend the MOCA CTF Finals last week. It was a very unique and exciting event to hack in a camping tent next to the sea😎 Thank you for inviting us!

Tweet Image 1

ptr-yudai Reposted

ptr-yudai

18 Aug

I really liked how #AlpacaHack made solo CTFs fun. The challenges this round is cool to play with, too.

ptr-yudai Reposted

ptr-yudai

18 Aug

Round 1 (Pwn) just ended 🦙 Thank you to all the players who participated! Congratulations to the top 5 players: 1. @_qwerty_po 2. jt5 3. @moratorium08 4. attempt0 5. @zeosutt

Tweet Image 1

ptr-yudai

16 Aug

I am pleased to announce that I will be the organizer for the first round of the AlpacaHack! Round 1 will start on Sunday. It's a short 6-hour CTF with 4 pwnable challenges. alpacahack.com

ptr-yudai Reposted

ptr-yudai

9 Aug

We are thrilled to announce that our researcher Akira Moroo (@retrage) and CEO Ren Kimura (@RKX1209) will be speaking at HITCON CMT 2024 in Taiwan! Title: Lessons Learned from a 4-Year Journey on Developing a Generic Fuzzing Framework hitcon.org/2024/CMT/agend…

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Lessons Learned from a 4-Year Journey on Developing a Generic Fuzzing Framework - HITCON CMT 2024

Source: https://t.co/tMefcGbcNl

ptr-yudai Reposted

ptr-yudai

5 Aug

And the 2nd CTF focuses on Web, set for Sun, Sep 1, from noon GMT+9 for 6 hours, with @arkark_ creating the challenges. The 3rd CTF will explore Crypto. All these CTFs are designed to be especially enjoyable for beginners. Details will be announced soon!

ptr-yudai Reposted

ptr-yudai

5 Aug

Introducing AlpacaHack! A new CTF platform designed for individual players. Each CTF will host one category with four challenges. Kicking things off with Pwn on Sun, Aug 18, from noon GMT+9 for 6 hours. Our first challenge setter is @ptrYudai! alpacahack.com

ptr-yudai

9 Jul

too late but my google ctf writeup🍣 ptr-yudai.hatenablog.com/entry/2024/07/…

Tweet Image

Google CTF 2024 Quals Writeups - CTFするぞ

Source: https://t.co/61ygCYMK8u

ptr-yudai

31 Mar

Thank you for playing #ACSC ! I've made only one warmup pwn challenge thanks to the great works of @shojin_comp @j_wang_11 and Zafirr 👏

Tweet Image 1

ptr-yudai Reposted

ptr-yudai

18 Feb

🚀 ACSC 2024 (Asian Cyber Security Challenge) is Happening!🚀 📅 March 30-31, 2024 🌟 Mark your calendars! 🔜 Registration opening soon. Don't miss out! More details here ▶️ acsc.asia #ACSC2024 #CyberSecurity #SaveTheDate

ptr-yudai

23 Jan

#MAPNA CTF writeups🍣 ptr-yudai.hatenablog.com/entry/2024/01/…

Tweet Image

MapnaCTF 2024 Writeup - CTFするぞ

Source: https://t.co/LvJ1DjZpzS

ptr-yudai

31 Dec

I wrote 70 CTF challenges this year, which is my personal record🫠 hackmd.io/@ptr-yudai/HyL…

Co-founder and hacker @zellic_io and @pb_ctf | https://t.co/nlNai6iiMP | 24

I may be slow to reply to DMs, please email for business inquiries

cts🌸🏳️‍⚧️

@gf_256

| CyberSecurity | Reverse Engineering | C and Rust | Exploit | Linux kernel | PhD | My Tweets, My Opinions :) |

0xor0ne

@0xor0ne

1st place @ CTFTime 2022

https://t.co/XbVJUcd3oV

organizers

@0rganizers

CTFer / APT hunter / RedTeam / BlueTeam
the member of @r3kapig
the leader of @ShadowChasing1
CVE-2022-30190
find job opportunities
opinions are own not group

crazyman_army

@CrazymanArmy

# Exploit Reliability Engineer
# Developing a full-system snapshot fuzzer: https://t.co/mfVXhwoGYD
# Avi: https://t.co/3fsQfVprCf

h0mbre

@h0mbre_

Touring sourcecodes @dfsec_com. ARIN ISP Operator. Retired CTF player from @r3kapig. @ProjectSEKAIctf Ambassador(?). All my exploits are written in nano. す

stypr

@brokenpacifist

CTF player @Shellphish | PhD Student @ASU | @angrdothorse dev | Author of how2heap | Vulnerability Research Hobbyist | @kylebot@infosec.exchange

kylebot

@ky1ebot

Security engineer at @google, CTF player for @0rganizers and @polygl0ts
Personal account.
Mastodon: @nspace@infosec.exchange

Matteo Rizzo

@_MatteoRizzo

Lead Cosmos Security Engineer @zellic_io,
CTFer @SuperGuesser,
Prev: Android Vulnerability Research @dfsec_com

Faith 🇧🇩🇦🇺

@farazsth98

EVM/Web Auditor at @zellic_io | CTF w/ @SuperGuesser (Captain) |
DEFCON 29 - 32 Finalist

sqrtrev

@sqrtrev

I make animated computer science videos • product & design @pdiscoveryio • blog at https://t.co/RLiSNOVQ0W

PwnFunction

@PwnFunction

Founder @ProjectSekaiCTF | Software Engineer @MicrosoftVan | Chunithm 虹レート

sahuang

@sahuang97

irresponsible disclosure aficionado

blasty

@bl4sty

ZKP Engineering & Security @SuccinctLabs / @SuperGuesser

rkm0959

@rkm0959

機械学習&ソフトウェアエンジニア@PreferredNetJP。前世では物理をやっていました。最近の趣味は CTF の Crypto (@WreckTheLine, @x_vespiary)
OSEP取得
https://t.co/dSaAj92fU4

だこつ

@y011d4

security researcher/programmer/director @ HexArcana Cybersecurity GmbH ⁂ @pagedout_zine ⁂ @DragonSectorCTF ⁂ https://t.co/ShG2c5As1K ⁂ ex-Google ⁂ he/him

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Vie

@vie_pls

Pew

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Webアプリケーションつんつん職人
Cyber Security Engineer / Bug Hunter

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@satoki00

Go/Rust/React/exploit
Developer/Security Researcher
CTF Contrail/hogehogeErs
job offer/contact : DM me.

内輪以外 @XandyCochieyer

douro

@douro_tachibana

tnhat

@tnhat_1100

Terry Matthews

@TerryMatth80504

https://t.co/JhvjYydYvQ

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@KaligulaSec

Matrices on a grill!

eropos

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Web Exploitation | CTF Player

Blog: https://t.co/FBHRfvDu5D

Aravindh

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Tech. Bug Hunting. CTFs. Security Engineering.

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@RakeshMane10

future world champion // @hackucf knightsec

:^)

@oatmealsecurity

Bill

@BillWeldsMetal

vivi_casts_tweet

@why_am_i_a_neet

chunying

@chunying668

Loves Cryptography, Math and Low-Level.

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ی نویز تو کهکشون رادیو زمین! 🌍

danial

@dny_all

Life-long Learner.Don't know which way to go. Follow me. Cybersecurity | Web3 ( @AlchemyLearn ). DM for work or Speaking Engagements.
RT's != Endorsements

🇰🇪TailoredAccessOperator🇳🇬

@gkarumbi

Hackademic by passion. PhD candidate @ruhrunibochum

I love building, breaking, and fixing technology.

Felipe Novais

@felipenovais42

is07king

@is07king

Owner Of iOS Texture Pack For Geometry Dash, Beta Tester Of iCreate Pro, Contributor Of Project Lumina, Translator Of Geranium, Translator Of Roothide Bootstrap

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@TheWick70207641

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Nhân viên bảo vệ.

Van Pham

@vanpn_

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@SEttabaq25403

Blockchain Security Researcher : )

jinu.eth

jinu

@lj1nu

eigen

@eigen_kye0ng

Security Researcher | CTF Player @SuperGuesser @ HypeBoy | @ENKI_official_X Research Team

_g0ri

@__g0ri__

Lê Quốc Bảo

@bao190505

Life itself is a journey, we are all worthy and should strive to travel to different lives.

McThonde

@McThonde86334

thatinternalguy

@thatinternalguy

ks

@ksprsk_

ビンボーから成り上がり/5社の会社を経営/資産100億・最近は副業の情報を教えたり、10万円をプレゼント企画したりしてます／現在LINE追加で10万円プレゼント企画中｜まずはフォローしてください/こちらで当選→　https://t.co/ZB2VCHhqqK

NATSUKI@自由人女社長

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@Kurox1337

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M

@qlicp

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@Ciph3rCat

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Purdue | BS in Cybersecurity

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@_bronson113

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@capuchango

nnor

@haxnor

The Cognitive Optimization Master. I talk about Expertise Development, Memory, Cognitive Development, and Learning - I'm a multilingual, hacker, synesthete.

Jason A Yorty

@jsn_yrty

21 yo | let's see if i can put this app to good use | pfp and header by aenami

safaret0

@safaret0

Okoonzz

@okoonz_5

CTF team @ Instituto Superior Técnico, Universidade de Lisboa 🇵🇹

STT

@STTSec

Aswin Shobanan

@iheartstoller

security engineering / leading by example

Akito

@________akito

Hacking the planet

Ashish Kumar

@0x526f6f744b

Co-founder and hacker @zellic_io and @pb_ctf | https://t.co/nlNai6iiMP | 24

I may be slow to reply to DMs, please email for business inquiries

cts🌸🏳️‍⚧️

@gf_256

1st place @ CTFTime 2022

https://t.co/XbVJUcd3oV

organizers

@0rganizers

CTFer / APT hunter / RedTeam / BlueTeam
the member of @r3kapig
the leader of @ShadowChasing1
CVE-2022-30190
find job opportunities
opinions are own not group

crazyman_army

@CrazymanArmy

# Exploit Reliability Engineer
# Developing a full-system snapshot fuzzer: https://t.co/mfVXhwoGYD
# Avi: https://t.co/3fsQfVprCf

h0mbre

@h0mbre_

Touring sourcecodes @dfsec_com. ARIN ISP Operator. Retired CTF player from @r3kapig. @ProjectSEKAIctf Ambassador(?). All my exploits are written in nano. す

stypr

@brokenpacifist

CTF player @Shellphish | PhD Student @ASU | @angrdothorse dev | Author of how2heap | Vulnerability Research Hobbyist | @kylebot@infosec.exchange

kylebot

@ky1ebot

Security engineer at @google, CTF player for @0rganizers and @polygl0ts
Personal account.
Mastodon: @nspace@infosec.exchange

Matteo Rizzo

@_MatteoRizzo

Lead Cosmos Security Engineer @zellic_io,
CTFer @SuperGuesser,
Prev: Android Vulnerability Research @dfsec_com

Faith 🇧🇩🇦🇺

@farazsth98

EVM/Web Auditor at @zellic_io | CTF w/ @SuperGuesser (Captain) |
DEFCON 29 - 32 Finalist

sqrtrev

@sqrtrev

I make animated computer science videos • product & design @pdiscoveryio • blog at https://t.co/RLiSNOVQ0W

PwnFunction

@PwnFunction

Founder @ProjectSekaiCTF | Software Engineer @MicrosoftVan | Chunithm 虹レート

sahuang

@sahuang97

ZKP Engineering & Security @SuccinctLabs / @SuperGuesser

rkm0959

@rkm0959

security researcher/programmer/director @ HexArcana Cybersecurity GmbH ⁂ @pagedout_zine ⁂ @DragonSectorCTF ⁂ https://t.co/ShG2c5As1K ⁂ ex-Google ⁂ he/him

Gynvael Coldwind

@gynvael

ARTIST // HACKER ☁️ CTFs @mmm_ctf_team // @maplebaconctf ☁️ security engineer @ Google ☁️ opinions expressed are my own ☁️ she/her

Vie

@vie_pls

Pew

@TheGrandPew

Go/Rust/React/exploit
Developer/Security Researcher
CTF Contrail/hogehogeErs
job offer/contact : DM me.

内輪以外 @XandyCochieyer

douro

@douro_tachibana

CTF(team: @zer0pts🐣, @BunkyoWesterns🐈, @TeamHarekaze⚓)が楽しくて好き。Web問ばかり解いています。

st98

@st98_

AKA mystiz. Programming at a company which help look for things. Tweets on 🇭🇰 and Cybersec. Opinions are my own.

Samuel Tang

@mystiz613

Furutsuki

@theoremoon

Rev & Crypto | Work @theori_io @dreamhack_io | CTF @pb_ctf | HypwnLab | DEFCON CTF 2017-2024 Finalist

RBTree

@RBTree_

Web3 Security Researcher / ex-reverser / prev. @kalos_security, @theori_io

Sihoon Lee

@push0ebp

$Yet another CS student from Taiwan. Interested in web and binary exploitation. CTFs w/ @Water_Paddler and ${CyStick}.$

Alan Li

@lbrnli1234

Web CTF Player, Balsn

Ginoah

@g1n04h

eigen

@eigen_kye0ng

Blockchain Security Researcher : )

jinu.eth

jinu

@lj1nu

ks

@ksprsk_

CTFer (@XxTSJxX) | Pwn | Crypto | Misc
Purdue | BS in Cybersecurity

bronson113

@_bronson113

A community | RomHack Conference, Training and Camp - more info https://t.co/15V29skoWi

Cyber Saiyan | RomHack Conference, Training, Camp

@cybersaiyanIT

CTF player in fibonhack

b0n0b0

@b0n0b0__

Computer Engineering @unipisa | CTF @fibonhack @aboutblankets | Blockchain Security @osec_io

nick0ve

@nick0ve

BSc Computer Science Engineering | 24 | Studying | Trying to find my way | Opinions are mine | 🍭

maitai

@MaitaiThe

Cyber Security, Threat Hunting, Malware Analysis, Ethical Hacking, Open Source, Cryptography, Forensic, Privacy, Anonymity, Linux, Bitcoin, Nostr.

CR1PT0

@CR1PT0SECURITY

Computer science student @ UniPI - ctf player with fibonhack, r00tstici - Security Engineer @ Doyensec

Aleandro

@drw0if

🦙 A platform for exploring cybersecurity through Capture The Flag 🦙

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@AlpacaHack

Cloud/Web2-3 sec guy, Hacker, SE Student, a Bookworm, Art enjoyer, A computer guru with an artistic mind and CTF player with @SOter14Team 🧨🚀

fir3cr4ckers

@YBK_FireLights

Youssef Mohamed

@Gandalf0980

Cybersecurity, LLM Hacker, BlackHat/Defcon Speaker, PenTest Tools Developer https://t.co/LtGIwJ6oR2

Shøta Shinogۜi🔑

@Sh1n0g1

uncertified unethical hacker (Vulnerability Researcher, employed): breaking everything running on 0 and 1's.

Ta-Lun Yen

@logonfail

Hi? It's me. Sunrin Internet High School 115th / noob CTF player

ursobad

@ur_obad

Senior Scientist @tu_wien / Web security / CTF w @mhackeroni @We_0wn_Y0u @kukhofhackerei @TeamAustriaECSC / #drumandbass DJ / @minimalblue@infosec.exchange

Marco Squarcina

@blueminimal

CTF @ 217 & HITCON

David Chiang

@david942j

Debugging my life…

X1do0

@X1do01

Acceleration is a substitute for eternity.

SuperFashi

@SuperFashi1

@gmo_ierae 執行役員。ex- @ricercasec_jp 。ファジングとかの研究をしてました。CTFや競技プログラミングをしていました(DEFCON本戦7回、ICPC WF2回など)。『Binary Hacks Rebooted』著者

小池悠生

@shojin_comp

Graduated from @ZJU_China｜Retired CTF player @AAA ｜Binary security ｜Virtualization security ｜Spoke at HITB, HexaCon, GeekCon

kangel

@J_kangel

CS Master student @ETH, CTF with @0rganizers, @flagbot_eth, Team Europe for ICC 2022, ex intern @google

Moritz

@Bazumo

Leonardo Galli

@galli_leo_

Defcon30~32 RedAlert ICS CTF/ BHMEA2022-23 Smart City / CDDC 2022-24 / 🇰🇷

rasser

@Rasser_pwn

Penetration testing & Red Teaming

Ruslan Sayfiev

@cryptopeg

PhD student in Cryptography, CTF Player, (Former) Competitive Programmer, Crossfitter, Longboarder, Rock Mania

BaaaaaarkingDog

@baaaaaarkingdog

Illustrator + CharacterDesigner
ポケモンカード、#Ratatan のキャラクターデザイン、Deltaruneのゲストキャラデザイン、T-boyソフビなど│2nd @nelnalium_2│Tag #NELNAL_F , #MUTANT_FRIENDS , #SOULMONITOR

Nelnal／ネルナル

@nelnalium

Retired ASIS CTF player! @Crypto_CTF and @ASIS_CTF orgs.

refactoreal

@refactoreal

https://t.co/GBVv7pZWex | https://t.co/Kw008lwY2K

sy

@4ynch

Professor, Chair & Director, UQ Cyber Security, The University of Queensland, Australia. RT not endorsements.

Ryan Ko

@ryan_kl_ko

SiJing Zheng

@fulminatingmoat

Security Engineer | CTF Player @0tolerance_ctf

P3taByte

@0xp374

hacking, ctfs. playoff rondo

Chris Issing

@ChrisIssing

CTFer (pwn)/(rev)/(forensics)/((Web)) seccamp2021 C seccamp2022 2023 Cチューター TSG/Bunkyo Westerns https://t.co/HmArjORTwo

イワシイラ

@iwashiira

strangely looping • 🛹🐶 • australian language enjoyer • sovereignty never ceded • consultant @ shea security

chsh

@0xchsh

CTF Player @towerofhanoi and @mhackeroni | Security Researcher | Coach @CyberTeamItaly | Coach Team Europe

JinBlack (Mario Polino)

@JinBlackx

loves game-dev/graphics/ctfs | developer/plays CTFs at @sdslabs | contributor at @Terasology | plays CTFs at @infoseciitr
undergrad at IIT Roorkee

Manas

@sin3point14

I like cats , computers and ctf’s | Captain @thehackerscrew1 | Slutt datafag

Moriarty

@Rudrakshsaini2

Security research @ MORSE. Occasional snowboarding and climbing posts 🏳️‍🌈

Rowan Hart

@novafacing

Researcher / Co-Founder @TrapaSecurity & @pwnabletw/ MSRC Top 100 2019/2020 / Focus on hunting bugs that are as useless as me / @l4ys@infosec.exchange

Lays

@_L4ys

@d3vc0r3 / CTF with ${cYsTiCk} / 友民党 / zh-TW, nan-TW, en-US, es-PY / 🐈‍⬛🐈‍⬛🐈‍⬛

splitline 🐈‍⬛

@_splitline_

cryptography PhD student @NYU_Courant, defund @dicegangctf, 𝘩⁺

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