Tags: osint ciphertexts 

Rating: 4.0

They given a painting of King Denis of Portugal, We need to find the flag with given clues ,
- In Exif data of image we can find

- Decipher the base64 and use vigenere cipher with `Denis` as a key , you will get a link


- search for user names and you will find this reddit page https://www.reddit.com/user/ThePoetDenisTheFirst/comments/p603mv/love_is_beautifull/

- with the help of the reddit Description , they mentioned as `The simple dev` contributer , search for his github page, "DenisBurgundy"
And he created the repo about the king's saint wife , finding the repo , in one of the commit , you will find another `base64`.

- now you know the flag format as `flag{DaughterName_SonName_BuriedPlace}`

- search in wiki, you can find the details asking to form a flag

**Flag**: `flag{Constance_Afonso_MonasteryofSaintDenis}`

### Writeup with detail

[Detailed writeup](https://github.com/shyamprasath18/writeups/blob/master/Jornadas%202021%20CTF/The%20Poet%20Denis%20The%20First.md)