↓Skip to main content
ENOENT

ENOENT

Co-founder of Stackered • CTF player

Recent

FCSC 2024 - Write-Ups for the crypto challenges
·72 mins
Crypto Write-Up Ctf

In this post, I’ll present my write-ups for all the challenges listed in the crypto category, ordered by difficulty rating.

The challenges are:

  1. AdveRSArial Crypto (Baby)
  2. El Gamal Fait 1/2
  3. El Gamal Fait 2/2
  4. The pake is a lie
  5. AdveRSArial Crypto (Kiddo)
  6. Broadcastopol
  7. Salade de fruits
  8. Share a Saucisse
  9. Winternitz is coming
  10. Appellation d’Origine Protégée
  11. Secret SHenanigans
  12. Tight Schedule
Breaking Python's PRNG with a few values and no bruteforce
·8 mins
Crypto
In this project, our focus will be on Python’s random implementation. We’ll demonstrate that even with a small number of outputs (as few as 6 for a 32-bit seed), it’s feasible to deduce Python’s original seed.
KalmarCTF 2024 - One key to rule them all
·16 mins
Web Crypto Write-Up Ctf
Encryption is easy, but key management is hard - I got the solution! Just use one key everywhere, i.e. nothing to manage (just don’t lose it)
Android Manifest Anomaly Detector
·3 mins
Mobile
AMAnDe stands for Android Manifest Anomaly Detector. It’s a new tool whose objective is to extract and gather information from an Android Manifest. When we deal with huge Manifests, it is often difficult to get all relevant datas (like deeplink URIs, exported provider, etc.) With AMAnDe all of this information is deeply analyzed and presented to you in a simple manner.
FCSC 2022 - Write-Ups for some of the crypto challenges
·37 mins
Crypto Write-Up Ctf

In this post, I’ll present my write-ups for some of the challenges listed in the crypto category, in no particular order.

The challenges are:

  1. Shuffled
  2. My Tailor is Rich
  3. T-Rex
  4. Gaston La Paffe
  5. Surface
  6. Hash-ish
  7. Kahl Hash
  8. Share It
  9. IZNOGOOD
  10. Millenium

I didn’t manage to solve two of them, but I will briefly give my thoughts on them.