Lior Yehezkely
@lior5654
Followers
317
Following
297
Media
22
Statuses
108
security researcher. mathematician. main account. personal account: @lior5654alt
Joined August 2021
I'm excited to share that I've finally started to upload content to my research blog - https://t.co/TQpBH36o6O ! My first post is a writeup of a critical unintended cryptographic security vulnerabilty we found during HITCON 2024 Qualifications, which we won 1st place 🔐🇹🇼
1
18
94
:o
1/n I’m thrilled to share that our @OpenAI reasoning system scored high enough to achieve gold 🥇🥇 in one of the world’s top programming competitions - the 2025 International Olympiad in Informatics (IOI) - placing first among AI participants! 👨💻👨💻
0
0
0
The Flare-On challenge website has been updated with a countdown. #FlareOn12 will start on September 27, 00:00 UTC.
1
4
20
🎉Happy New Year! Here's our 2024 Wrapped: - Ranked 10th on CTFtime, won 8 CTFs out of 23 played individually - Top finishes in multiple onsite finals (2nd in SAS CTF with @r3kapig, 2nd in ISITDTU CTF Finals, 5th in SCAN CTF, 1st in HIT CON Finals with @malta_ctf etc.) (1/3)
1
7
35
Happy new year! Our 2024 Recap is here: - 6 CTFs won, including 2 DEFCON Prequalifiers - 1st meetup of ~80 members @ DEFCON - 19.5k mvms sent on Discord - Rank #2 global on CTFtime We're incredibly proud of all of our members and look forward to seeing everyone again next year!
3
21
92
Flare-On 11 - FIN 🐉🎉 Didn't have much time this year, but I'm glad I got to finish in the end (9 hours before the deadline 🥶) #FlareOn11
0
0
47
“you have something called "determination." so as long as you hold on... so as long as you do what's in your heart... i believe you can do the right thing.” ~ Undertale #FlareOn11
0
2
49
By far, one of the hardest reverse engineering challenges I've ever done on a CTF. #FlareOn11
0
0
51
Halfway through Flare-On 11, and the challenges are 🔥 this year! I think this might be a great opportunity for a new series of posts in my research blog after the CTF wraps up👀 #FlareOn #CTF #ReverseEngineering
I'm excited to share that I've finally started to upload content to my research blog - https://t.co/TQpBH36o6O ! My first post is a writeup of a critical unintended cryptographic security vulnerabilty we found during HITCON 2024 Qualifications, which we won 1st place 🔐🇹🇼
0
0
7
G.O.A.T 🐐
Topcoder paused their competitions, so I had to go for another 4000.
0
0
0
Registration for SekaiCTF 2024 is now open: https://t.co/GzovO60khq Our prize pool features USD$3,000 in cash and prizes worth over $10,000! Join our Discord to keep up-to-date: https://t.co/VL37P7TdMG Huge shoutout to our sponsors. Thank you for your generous support: -
0
12
40
🥈
corCTF 2024 just ended 🥳 Thank you once again to all of our wonderful sponsors and players! Congrats to the top 5 teams: 1. @amateurs_team @vsctf 2. @ProjectSEKAIctf @r3kapig 3. @CyberTeamItaly 4. @x_vespiary 5. @idekCTF The last 3 hours was really a tight battle 👀
0
0
4
0
1
15
Over the last two weeks, I've been working on making a secure chat in #Rust. Check out the blog post I made about it here!
vaktibabat.github.io
Prelude Hello! Today, we are going to make a secure chat in Rust. “Secure” means that we don’t want attackers/eavesdroppers to be able to find out the contents of our messages (privacy), and we also...
1
1
2
Today I wrote my first #MalwareAnalysis writeup about analyzing a trojan! https://t.co/eOxNoYgarA
#Reversing #CyberSecurity #ReverseEngineering #Hacking
vaktibabat.github.io
Prelude Today, we’re going to reverse engineer a real-world RAT (Remote Access Trojan) malware, and understand what it does exactly. This project will teach us a lot about common malware techniques...
0
3
1
WE WON HITCON QUALS 🐸🐸🐸 (* Neobeo carried)
What a great weekend finishing 1st in HITCON QUALS! Thanks to @HacksInTaiwan for the great challenges and see you in Taipei in November🇲🇹 Also congrats to Blue Water & @thehackerscrew1 for getting 2nd & 3rd.
0
0
11
#SekaiCTF 2024 is in 2 months! We are thrilled to announce that we have partnered with @XCTF_League to be a qualifier event for the 9th XCTF Finals hosted in China. As such, the winning team of SekaiCTF 2024 will earn a spot in the 9th XCTF Finals. Best of luck to all teams!🏆
1
4
44