# Asian Cyber Security Challenge (ACSC) 2021

## Writeups

### Web

* [API](https://ctf.zeyu2001.com/2021/asian-cyber-security-challenge-acsc-2021/api)
* [Baby Developer](https://ctf.zeyu2001.com/2021/asian-cyber-security-challenge-acsc-2021/baby-developer)
* [Favorite Emojis](https://ctf.zeyu2001.com/2021/asian-cyber-security-challenge-acsc-2021/favorite-emojis)
* [Cowsay as a Service](https://ctf.zeyu2001.com/2021/asian-cyber-security-challenge-acsc-2021/cowsay-as-a-service)

### Crypto

* [RSA Stream](https://ctf.zeyu2001.com/2021/asian-cyber-security-challenge-acsc-2021/rsa-stream)

### Pwn

* [Filtered](https://ctf.zeyu2001.com/2021/asian-cyber-security-challenge-acsc-2021/filtered)

### Forensics

* [NYONG Coin](https://ctf.zeyu2001.com/2021/asian-cyber-security-challenge-acsc-2021/nyong-coin)

## 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 :)

![](https://3167364547-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MX1bWRlBzHpEPe1TYDD%2Fuploads%2Fgit-blob-08331c18079ec6aef8193dbd936289542d85ba4c%2FScreenshot%202021-09-19%20at%202.33.54%20PM.png?alt=media)