RBTree @RBTree_ Twitter profile

Pinned Tweet

RBTree

10 months

Also, I’m going to join @theori_io soon. My job would be writing some lectures, making some challenges on @dreamhack_io . + guaranteed to have some time for individual study. ;)

3

0

43

Last Seen Profiles

@pengen_stw

@VmaniakJ

@thekubestudio

@ContactoSur7

@Kakaje2111111

@Solacin_21

@yate3523

@coachswill58

@papitusss

@ashevil1985

@UhlenPoker

@shtmaluv

@q1OxP6P33Ni8M6u

@NedraEther86236

@GabrielleN45876

@kimasoldat

@2_kizi

@edoardismo

@Tante_Binal69

@ExSportsToken

@dukemaluke

@top2029338

@TruthMatters333

@pengen_stw

@htdLjZ9877GMN

@JJ_Brownbridge

@LeeHughess8

@TaehyungFunds

@stakehighroller

@DamsiCS2

@ReseauMotival

@phe_quai

@Colette_E36

@SamaniegNor

@TimothyMon52543

@SauSataram64619

RBTree

@RBTree_

2 years

Damn, this book is GOAT. It's better than finding random stuffs on the Internet. Now I feel like I'm *really* studying... Thanks @grhkm21 for finding this awesome book

4

60

329

RBTree

@RBTree_

2 years

gg! the first place

6

2

107

RBTree

@RBTree_

3 years

6th place in DEFCON CTF! nice

3

102

RBTree

@RBTree_

3 years

first place in crypto CTF!!!

2

91

RBTree

@RBTree_

1 year

3

2

82

RBTree

@RBTree_

3 years

Big win @ PlaidCTF :D

1

2

77

RBTree

@RBTree_

2 years

me with "the" sticker

1

78

RBTree

@RBTree_

11 months

It’s the highest rank I’ve ever got in the defcon ctf finals

2

4

73

RBTree

@RBTree_

2 years

Wow, 1st place again?

6

3

65

RBTree

@RBTree_

3 years

RBTree with CryptoHack T-shirt

0

2

61

RBTree

@RBTree_

2 years

pbctf 2022 is now registered in CTFtime.

pbctf 2023

ctftime.org

3

2

63

RBTree

@RBTree_

9 months

Great

8

1

63

RBTree

@RBTree_

11 months

Holy shit i got 1k followers how???

4

0

56

RBTree

@RBTree_

2 years

I think I spent too much time on the last challenge, by a stupid mistake... The level 8 was the most difficult, decent and interesting. Whatever, gg :) Spent ~16 hours in total #flareon9

2

0

53

RBTree

@RBTree_

3 years

I have a job interview today, very nervous

5

0

54

RBTree

@RBTree_

2 years

I said, organizers strong, right?

4

53

RBTree

@RBTree_

2 years

we need an international law to enforce every CTF being held between friday night to sunday night in all the timezones

4

3

50

RBTree

@RBTree_

1 year

gg

0

1

49

RBTree

@RBTree_

3 years

오랜만의 블로그 포스트입니다. 이 시국에 DEF CON CTF 가기

2

6

46

RBTree

@RBTree_

3 years

I want to have a hobby which is not related to computers, but I have no idea what normal people have usually

22

2

44

RBTree

@RBTree_

9 months

Pictures from my last Japan trip

1

0

44

RBTree

@RBTree_

4 years

I'm really glad to announce that I'm now the member of the team Super Guesser ( @GuesserSuper )! Every member is passionate, and the mood of the team is encouraging!

4

2

43

RBTree

@RBTree_

4 years

HITCON CRYPTO ALL SOLVED I'm gonna sleep

1

0

43

RBTree

@RBTree_

2 years

Any good links for random people who ask how to begin CTFs? I should make a blog post and just throw it to them if I get DMs

8

1

44

RBTree

@RBTree_

2 years

New blog posts! Cube Attack Interpolation Attack

Interpolation Attack

I made one crypto challenge each for CODEGATE CTF 2022 quals and finals. In this article, I’m gonna explain how the interpolation attack works, and show the way to solve my challenge “Hidden Command...

rbtree.blog

0

6

43

RBTree

@RBTree_

3 years

Today is the day I go to my new house 🤩🤩🤩

0

38

RBTree

@RBTree_

2 years

I only slept like 1.5 hr and it just became nothing

4

2

41

RBTree

@RBTree_

2 years

I got positive on both PCR and rapid antigen tests. 🥲 The afterparty was very fun, but it is time to pay the penalty for meeting people w/o masks in this COVID era

4

0

41

RBTree

@RBTree_

2 years

It was a great time to meet you guys at the afterparty! I hope we will meet again somewhere in future 😆

3

0

39

RBTree

@RBTree_

3 years

perfect blue in partners of CSAW'21 :megajoy:

0

2

36

RBTree

@RBTree_

1 year

It was super close. gg

4

0

37

RBTree

@RBTree_

3 years

Passed.

0

38

RBTree

@RBTree_

2 years

wow

4

1

35

RBTree

@RBTree_

2 years

As I was demotivated a lot for about 3 years, I wanna start again by posting some tips and write-ups.

2

0

33

RBTree

@RBTree_

1 year

I really enjoyed challenges from this SECCON CTF finals! I hope we can win next year 😎

0

1

35

RBTree

@RBTree_

3 years

wow diploma for NSUCRYPTO'2020 just arrived with @rkm0959 , BaaarkingDog

0

3

32

RBTree

@RBTree_

2 years

0

34

RBTree

@RBTree_

2 years

Uploaded my simple differential testing tool for Qualcomm Hexagon stuffs It's not that great (tbh, bad), but you might be able to find out how to use/access Hexagon toolchains here

GitHub - hyunsikjeong/HexagonDiffTest: Tool used for "Analysis of the Correctness of Qualcomm...

Tool used for "Analysis of the Correctness of Qualcomm Hexagon Emulators and Decompilers via Differential Testing" - hyunsikjeong/HexagonDiffTest

github.com

0

9

33

RBTree

@RBTree_

9 months

왜 나만 뱃지 없어

2

0

33

RBTree

@RBTree_

3 years

This article is interesting: You may learn some cryptanalysis techniques here :D

Cryptanalysis of Meow Hash

The creators of Meow hash made security claims; we break them all.

peter.website

0

5

33

RBTree

@RBTree_

3 years

Asian Cyber Security Challenge가 찾아옵니다. 기존의 ECSC()가 확장되어, ICC라는 국제 대회가 2021년 12월에 그리스 아테네에서 열리게 되었습니다.

1

9

29

RBTree

@RBTree_

3 years

It's 5AM, and I cannot sleep, and my thesis defense is at 10AM.

3

0

29

RBTree

@RBTree_

3 years

rbtree arbitrary

3

0

31

RBTree

@RBTree_

2 years

I guess 0rganizers will take the 1st place in ctftime this year

6

2

30

RBTree

@RBTree_

2 years

Choo-choo, #1 again (I couldn't solve much tho)

1

0

31

RBTree

@RBTree_

2 years

It feels great to get the first #1 of this year (not including collab)

3

0

30

RBTree

@RBTree_

3 years

W

1

0

30

RBTree

@RBTree_

3 years

I guess I solved all cryptos in CTF 2021 🤗

1

0

30

RBTree

@RBTree_

3 years

I couldn't play a lot :( Solved: Silver Water Industries, OLLVM Crypt, OLLVM, PYCOIN, Touchy Logger (w/ VoidMercy), lwsr, and WhatTheHecc. Still I'm happy about getting first blood on 4 chals

0

27

RBTree

@RBTree_

4 years

GG

2

0

26

RBTree

@RBTree_

1 year

I helped solving omg and opacity, and solved nlinks and ziggypop.

4

0

25

RBTree

@RBTree_

2 years

There are bunches of good resources for CTF beginners :/ I'm not a personal coach

2

0

26

RBTree

@RBTree_

4 years

Team ToEatSushi @RBTree_Pg_ @pr0cf51 @zzoru @siwu_network @physicube @_bincat kookhh0827 @diff72840089 @gPayl0ad @e3xtr

Defenit

@Defenit_CTF

4 years

2020 Defenit CTF is totally over now. Did you enjoy it? We hope so :slight_smile: Congratulation to ToEatSushi! Thank you for playing 2020 Defenit CTF

0

11

29

1

7

27

RBTree

@RBTree_

2 years

btw I solved these challenges with teammates: Crypto Chall, Secrecy, Too Many Secrets, Old School (only the last part), router-nii (with brilliant guessing)

2

1

25

RBTree

@RBTree_

2 years

having great time with @esrever_25519 @Spittfires_

1

27

RBTree

@RBTree_

9 months

Please stop sending your CV to our team e-mail address 😢 we’re not a company hiring new people

2

0

27

RBTree

@RBTree_

4 years

recently I'm lacking motivation for playing CTFs so gonna take a rest for a while...

0

24

RBTree

@RBTree_

3 years

If you see 'rbtree fan club' in LINE CTF, notice that I'm not in that team

4

0

26

RBTree

@RBTree_

3 years

looks great

1

0

24

RBTree

@RBTree_

2 years

New blog post! (a simple one) SageMath script for AES-GCM challenges

SageMath script for AES-GCM challenges

There was an interesting challenge about AES-GCM in LINE CTF 2022, called ’lazy STEK.' I’m not gonna talk about the challenge itself. When I was solving this challenge, I realized that I did not save...

rbtree.blog

1

3

25

RBTree

@RBTree_

3 years

organizers so strong

1

2

24

RBTree

@RBTree_

2 years

I'm back :D

2

0

24

RBTree

@RBTree_

5 years

bitflip conjecture, 999 points! It was very difficult, and I was lucky. #DC27CTF

3

1

25

RBTree

@RBTree_

4 years

Whatever, taking the first place. GG @mathboy770 @stereotype32 @0x10n

0

2

24

RBTree

@RBTree_

3 years

why am I not good enough at crypto to make good crypto challenges...

1

0

23

RBTree

@RBTree_

3 years

There's a challenge named 'rbtree' in ASIS now? Why??

2

0

20

RBTree

@RBTree_

3 years

I guess UTCTF organizers usually don't play other CTFs. There are many ways to hold a good beginner-friendly CTF. The quality of CTF does not depends on the difficulty. Do not excuse like that.

hukc

@hukc_

3 years

@sqrtrev We have overwhelmingly positive reviews from beginner teams and extremely negative views from top tier teams. Not everyone is a CTF veteran and it's important to continue hosting beginner-friendly events.

1

0

6

2

3

24

RBTree

@RBTree_

4 years

SECCON of this year was really great, much better than the previous year's one

0

2

24

RBTree

@RBTree_

2 years

perfect r✪✪✪t winning again? wow, so strong

4

1

24

RBTree

@RBTree_

1 year

Finally finished thinking out challenge ideas… It was full of pains. My crypto challenges in this pbctf will be fun, but not that difficult [1]. At least it will be better than my pbctf 2021 challenges which I just directly copy-pasted from some papers 🥲 [1] Maybe false.

1

0

24

RBTree

@RBTree_

3 years

Uploaded my HITCON CTF 2021 write-ups in

0

1

23

RBTree

@RBTree_

3 years

I posted breif write-ups for: checkin, cloudpass, future, Guthib, pypypypy, singer, uc_baaaby, uc_goood, zer0lfsr-

3

1

24

RBTree

@RBTree_

3 years

pb discord server is something wrong

1

0

22

RBTree

@RBTree_

4 years

Finally, I can eat sushi. Thank you guys.

1

22

RBTree

@RBTree_

2 years

omg, some _crypto_ guys keep following me. Should I give them this: ?

2

0

22

RBTree

@RBTree_

5 years

gg CTF 2019

1

2

22

RBTree

@RBTree_

4 years

GG #zer0ptsCTF #god_shpik

3

0

22

RBTree

@RBTree_

1 year

ziggypop: I ran a local instance three times with GDB to communicate with the server, and then decrypt the flag 🤣 I'm not a big fan of dynamic analysis, but I was too lazy to reverse AVX512 insns

4

1

20

RBTree

@RBTree_

3 years

Did you know that perfect blue is actually a Korean team?

3

0

23

RBTree

@RBTree_

3 years

I think midnight sun just replaced my best guessing CTF ever

0

22

RBTree

@RBTree_

2 years

Wait, does that mean that I'm gonna receive 'that sticker' from 0rganizers in Vegas?

1

23

RBTree

@RBTree_

2 years

damn this one is a treasure for me I'm not gonna lose this picture

0

22

RBTree

@RBTree_

4 years

No it's 11th place :( Thanks for those great challenges! I'm looking forward to new ones @CryptoHack__

2

21

RBTree

@RBTree_

3 years

Okay, 0CTF/TCTF Quals 2nd place

2

0

22

RBTree

@RBTree_

3 years

Do not ask me a stupid question :( Why don't you ask me to decrypt Cicada cipher, if you have no clue on which algorithm is used?

10

1

21

RBTree

@RBTree_

1 year

Finally read a post from @mystiz613 . both challs are super interesting

HKCERT CTF 2022 Postmortem (III): The Remaining Challenges

In the last part, I will include the two non-crypto challenges I wrote for HKCERT CTF 2022: Numbers go brrr and Minecraft geoguessr.

mystiz.hk

1

2

23

RBTree

@RBTree_

3 years

I'll prepare more crypto challenges next year 😢😢😢

0

20

RBTree

@RBTree_

2 years

Finally

0

20

RBTree

@RBTree_

5 years

TCTF 2019 Final photos XD

1

0

22

RBTree

@RBTree_

2 years

Wow, these comments...

0

1

22

RBTree

@RBTree_

3 years

who is the author of nooombers seriously

0

1

22

RBTree

@RBTree_

1 year

yay

0

1

22

RBTree

@RBTree_

3 years

Dear @factoreal Please post the write-up of unsolved ASIS CTF crypto challenges if you have time to click the like button. Sincerely, RBTree

2

1

20

RBTree

@RBTree_

2 years

It's really hard to understand some people kinda justifying what happend in this finals. There were numerous issues during the CTF, and I can see that most of those could be prevented before the CTF. Let's just admit it, no more excuses.

2

0

21

RBTree

@RBTree_

4 years

GG @CryptoHack__ The challenge "Prime and Prejudice" is really awesome!