[xman2018 qualifying] pass

[XMAN2018 Qualifying ] pass

Title address : https://buuoj.cn/challenges#[XMAN2018%E6%8E%92%E4%BD%8D%E8%B5%9B]%E9%80%9A%E8%A1%8C%E8%AF%81

First of all base64 Decrypt --> fence 7 encryption --> affine a=1 b=13 Decrypt

kanbbrgghjl{
    zb____}vtlaln

Fence code ： http://www.hiencode.com/railfence.html

kzna{
    blnl_abj_lbh_trg_vg}

Affine decryption a=1 b=13

xman{
    oyay_now_you_get_it}

flag{
    oyay_now_you_get_it}