BSides Mumbai CTF — Cryptography Challenge Author Writeups
Author writeups for Chebyshev’s Revenge, GCD, but it’s ACD, and Heat Death of RSA.
Cryptography
the archive.
Old CTF writeups, new thoughts, random experiments, things I probably should have written down sooner. It's all here.
21 entries
2026
BSides Mumbai CTF — Reverse Engineering Challenge Author Writeups
How I built and intended to solve Camlpocalypse, Revenant and PSE ESP.
Hardware
Why I Stopped Enjoying CTFs
CTFs used to be about learning and testing your skills but by 2026 they had started feeling like a competition between AI setups
Personal
How It Started
A random morning in 2019 and the old laptop that got me into programming
Personal
2025
Bypass CTF Qualifiers Writeups
Hello Guys! In this post we will be covering challenges from BypassCTF Qualifiers. Below is the list of challenges we’ll be covering and I…
CTF
CRACCON CTF Qualifiers Writeups
Hello guys, this is 5h1kh4r back with another CTF writeups post, this time covering the challenges I solved during the CRACCON CTF…
CTF
2024
UrchinSec Aware CTF 2024 Rev- All Challs Writeups
Good Morning/Afternoon/Evening CTFers! I’m 5h1kh4r and this post will include my writeups for all the Rev challenges in the UrchinSec Aware…
Reverse engineering
UrchinSec Aware CTF 2024 Cryptography — All Challs Writeups
Good Morning/Afternoon/Evening CTFers! I’m 5h1kh4r and I stood 1st in the UrchinSec Aware CTF 2024!!!
Cryptography
H7CTF — Challs Writeup
Good Morning/Afternoon/Evening/Night CTFers! I hope you’re having a nice day. I am 5h1kh4r, a fellow CTFer and my team “BlitzHack” stood…
CTF
OSCTF Forensics 6/10 Writeups
Hi guys, I’m Shikhar or better known as 5h1kh4r. I am the organizer of OSCTF and I am proud to announce that it was the first CTF…
Forensics
Baby Pass — BsidesMumbaiCTF
In this post I am covering the challenge “Baby Pass” from the BsidesMumbaiCTF competition. This challenge was under the web category.
CTF
2 Pwn Challenges — BsidesMumbaiCTF
In this post I am covering both the pwn challenges from the BsidesMumbaiCTF competition which are the following: 1.Lottery 2.Jail Shell…
Pwn / Rev
6/8 Misc Challs from BsidesMumbaiCTF Writeups
In this post I am covering 6/8 misc challs (which I solved during the Comp) from the BsidesMumbai CTF Competition. The Challs I am covering…
CTF
A Bucket Load of Samosa — BsidesMumbaiCTF
In this post I am covering the challenge “A bucket load of Samosa” under the Cloud category from the BsidesMumbaiCTF competition.
CTF
ManyDoc — BsidesMumbaiCTF
In this post I am covering the ManyDoc Challenge from BsidesMumbaiCTF competition which is under the forensics Category.
Forensics
Modded Game with Backdoor — BsidesMumbaiCTF
In this post I am covering the challenge “Modded Game with Backdoor” from BsidesMumbaiCTF competition which is under the Android category.
Pwn / Rev
2023
2022
Tryhackme Advent of Cyber Day 3
Another day, Another challenge. This one is based off OSINT (Open Source Intelligence). In a nutshell, OSINT means gathering of information…
CTF
Tryhackme Advent of Cyber 2022- Day2 (Log Analysis)
So we are on to day 2 and we have to do Log Analysis. Well as always I’ll try to explain Log Analysis in a nutshell….. Here we go:
CTF
Tryhackme Advent of Cyber-2022 Day 1
This challenge is just a introduction for the peeps looking to get into cybersec and it just explains the basic methodology of hacking and…
CTF
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