hxp 38C3 CTF

The CTF is over, thanks for playing! hxp <3 you! 😊
This is a static mirror, we try to keep files online, but all services will be down.

spiky_elf

by hlt and yyyyyyy
crypto

Difficulty estimate: medium - medium

Points: round(1000 · min(1, 10 / (9 + [12 solves]))) = 476 points

Description:

So I recently¹ did some power analysis stuff² and found this RSA private key, except I think I got a few bits wrong?


¹ not actually recent
² not actually power analysis


Download:

spiky_elf-722497613bbe984c.tar.xz (956 Bytes)

Solution:


CTFtime Logo CTFtime: Task & Writeups

Solved by:

# Team Time
spiky_elf released 2024-12-28 19:55:25 +0000 UTC
🥇 Friendly Maltese Citizens 2024-12-28 22:48:14 +0000 UTC
🥈 More Smoked Leet Chicken 2024-12-28 23:03:51 +0000 UTC
🥉 kalmarunionen 2024-12-29 00:23:52 +0000 UTC
4 f0f 2024-12-29 00:46:37 +0000 UTC
5 Never Stop Exploiting 2024-12-29 04:18:02 +0000 UTC
6 CyKor 2024-12-29 05:57:30 +0000 UTC
7 SuperDiceCode 2024-12-29 07:07:32 +0000 UTC
8 Aqua Cat 2024-12-29 08:14:00 +0000 UTC
9 *0xA 2024-12-29 12:09:32 +0000 UTC
10 RePokemonedCollections 2024-12-29 12:48:49 +0000 UTC
11 S1uM4i 2024-12-29 16:44:59 +0000 UTC
12 FluxFingers 2024-12-29 18:38:54 +0000 UTC