These are some challenges I made for CTF competitions organized by hxp.
The numbers are a very rough difficulty estimate on a scale from 0 to 9.
## TUMCTF 2016

### cryptography

### binary exploitation

- (6)
**c_with_templates**: embed printable shellcode into a constant string at compile time. files

### reverse engineering

- (5)
**lambda0xe**: reverse-engineer obfuscated C++14 code. files

## TUMCTF Teaser 2015

### cryptography

- (6)
**linear**: linear cryptanalysis of a toy block cipher. files
- (2)
**really_slow_arithmetic**: optimize an RSA private key. writeup