HTB - Crypto: POPO

Challenge Summary

  • Name: POPO
  • Category: Crypto
  • Difficulty: Medium
  • Goal: Recover the secret plaintext from a flawed Paillier-based service.
 

Zero

CTF notes by Zero

Exploiting a Paillier optimization bug that leaks the blinding term and reveals the encrypted secret message.

2026-02-27

Tags

#ctf #htb #cry