> For the complete documentation index, see [llms.txt](https://thienguen.gitbook.io/ctf-writeups/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://thienguen.gitbook.io/ctf-writeups/ctf/2025/nullconctf/crypto.md).

# crypto

## Challenges

<figure><img src="/files/5fd86yRIFFOpM0eBRimr" alt=""><figcaption></figcaption></figure>

gg, will write later...😪.