hxp CTF 2021 hxp

2021

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infinity

by yyyyyyy
crypto

Difficulty estimate: medium - medium

Points: round(1000 · min(1, 10 / (9 + [11 solves]))) = 500 points

Description:

I just implemented this cool 😎 isogeny-based key exchange 🏝️, but somehow my code seems buggy. 🍹

Can you help me figure out what’s wrong? 🦜

Download:

infinity-5cd8921c24851699.tar.xz (2.4 KiB)

Connection (mirrors):

  • nc 65.108.176.239 3153

Solution:

CTFtime Logo CTFtime: Task & Writeups

Solved by:

# Team Time
infinity released 2021-12-17 17:42:12 +0000 UTC
🥇 More Smoked Leet Chicken 2021-12-17 22:01:35 +0000 UTC
🥈 Balsn 2021-12-18 08:07:49 +0000 UTC
🥉 C4T BuT S4D 2021-12-18 09:33:58 +0000 UTC
4 DiceGang 2021-12-18 10:55:35 +0000 UTC
5 Nu1L 2021-12-18 21:18:36 +0000 UTC
6 Super Guesser 2021-12-19 06:26:26 +0000 UTC
7 httpizza 2021-12-19 12:06:44 +0000 UTC
8 Crocs-Side-Scripting 2021-12-19 12:44:56 +0000 UTC
9 copy 2021-12-19 13:18:27 +0000 UTC
10 Kalmarunionen 2021-12-19 13:56:38 +0000 UTC
11 Katzebin 2021-12-19 14:18:45 +0000 UTC