# lost\_decryption

- category: binary, crypto
- points: 200

reverse `libencrypt.so` and write decrypt function, and capture the flag!

I'm too lazy to explain, just read the f\*\*king code.

[decrypt code](decompiled.c)

Original writeup (https://github.com/Inndy/ctf-writeup/tree/master/2016-seccon/lost_decryption).