Lydxn

Pesky CBC (crypto, 7 solves)

Description

This new pesky mode of CBC makes decrypting too hard >:(
ncat --ssl peskycbc.atreides.b01lersc.tf 8443

Attachments: pesky_cbc.py

Challenge

Lydxn

Pycomment (misc, 2 solves)

In this writeup, I will share how I solved "Pycomment" from KalmarCTF 2025. It was one of the tougher pyjails this year and makes use of two really unique ideas.

Thanks for the challenge, @ChattyPlatinumCool 😛

Description

Can you please help us comment our code? And please don't attack us.

Lydxn

The Cyber Jawara International 2024

Below are my writeups to the Cyber Jawara CTF that I played in last week.

Challenges

• misc/Welcome (204 solves)
• misc/Stone Game (94 solves)
• misc/Restricted (1 solve)
• forensics/prepare the tools (46 solves)

Lydxn

___=int(__import__('sys').argv[1]
);_=___*(___//___<<___//___+___//
___+___//___|___//___)//(___//___
<<___//___+___//___+___//+___+___
//___)+(___//___--___//___);__=(_
//_+_//_--_//_)*(_+_+_-~_);print(


            ((_//_<<_//_+_//_+_//_|_//_+_//_)**___<<(_+_-~_<<_//_+_//_))//((
       ((((_//_<<__*_*_)//~-(_//_<<__*_)*(((_//_<<(_*_*__<<_//_))//((_//+_<<

Lydxn

// find solutions in the form:
// lambda s:hash(s+'????')%3

#include <stdio.h>

#define NUM 32
#define MIN 1
#define MAX 127
#define HBASE 1000003