> For the complete documentation index, see [llms.txt](https://kos0ng.gitbook.io/ctfs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kos0ng.gitbook.io/ctfs/write-up/2023/isitdtu-quals/reverse-engineering.md).

# Reverse Engineering

<table><thead><tr><th width="347">Challenge</th><th>Link</th></tr></thead><tbody><tr><td>sanity_check (223 pts)</td><td></td></tr><tr><td>simple_encrypt (413 pts)</td><td></td></tr><tr><td>Flag Keeper (496 pts) UPSOLVE</td><td></td></tr><tr><td>Flag Checker (500 pts) UPSOLVE</td><td></td></tr></tbody></table>

## ? (? pts)

### Description

### Solution