> For the complete documentation index, see [llms.txt](https://ctf.zeyu2001.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ctf.zeyu2001.com/2021/asian-cyber-security-challenge-acsc-2021.md).

# Asian Cyber Security Challenge (ACSC) 2021

## Writeups

### Web

* [API](/2021/asian-cyber-security-challenge-acsc-2021/api.md)
* [Baby Developer](/2021/asian-cyber-security-challenge-acsc-2021/baby-developer.md)
* [Favorite Emojis](/2021/asian-cyber-security-challenge-acsc-2021/favorite-emojis.md)
* [Cowsay as a Service](/2021/asian-cyber-security-challenge-acsc-2021/cowsay-as-a-service.md)

### Crypto

* [RSA Stream](/2021/asian-cyber-security-challenge-acsc-2021/rsa-stream.md)

### Pwn

* [Filtered](/2021/asian-cyber-security-challenge-acsc-2021/filtered.md)

### Forensics

* [NYONG Coin](/2021/asian-cyber-security-challenge-acsc-2021/nyong-coin.md)

## Results

I ended up 33rd in the global scoreboard, and 3rd in Singapore.

I definitely have a lot more to learn! Nevertheless, this CTF was really fun :)

![](/files/5JdrX1ytuPd4PIOBhTge)