Verify

Easy
Time Spent: 10 minutes
https://play.picoctf.org/practice/challenge/450

🧠 What I Practiced/Learned/Discovered

  • How to hash all the files of a folder

🔧 Tools used

Linux shell

  • sha256sum
  • grep

Steps

  1. Run sha256sum files/* | grep b09c99c555e2b39a7e97849181e8996bc6a62501f0149c32447d8e65e205d6d2 :
    • to hash all the files in files folder
    • then used grep to find the file with the same hash as the one provided
  2. Run ./decrypt.sh files/XXX : To decrypt the file and got the flag