## [See original writeup on site](https://barelycompetent.dev/post/ctfs/2021-04-11-ritsecctf/#robots)
### Robots> Robots are taking over. Find out more.>> 34.69.61.54:5247>> Author: f1rehaz4rd
Given the site URL, and the name of the challenge, we probably are interested in the `/robots.txt` file:
![](https://barelycompetent.dev/img/CTFs/2021/ritsecCTF/robots-flag.png)
Scrolling through here, we find the following entry:
```...        Disallow: /patents/download/        Disallow: /patents/pdf/        Disallow: /patents/related/        Disallow: /scholar        Disallow: /citations?        Allow: /flag/UlN7UjBib3RzX2FyM19iNGR9        Allow: /citations?user=        Disallow: /citations?*cstart=        Allow: /citations?view_op=new_profile        Allow: /citations?view_op=top_venues        Allow: /scholar_share...```
Notice, that **Allow: /flag/UlN7UjBib3RzX2FyM19iNGR9** entry. Navigating to that in the browser yields a 404. After a bit of guessing, I realized I should try to base64 decode the value, as it looked like an appropriate blob.
So,
```bashecho UlN7UjBib3RzX2FyM19iNGR9 |base64 -dRS{R0bots_ar3_b4d}```