[https://github.com/zionspike/ctf-writeup/blob/master/Crypto/%5BVolgaCTF%20Qual%202017%5D%20-%20VC%20-%2050/kapi-note.md](https://github.com/zionspike/ctf-writeup/blob/master/Crypto/%5BVolgaCTF%20Qual%202017%5D%20-%20VC%20-%2050/kapi-note.md)