下面的抓包显示，其中 key 每次都会变，于是分析小程序源码，发现，MD5(是提交参数 + kivi2018 ) 的值  

GET https://mas.wanzhushipin.cn/uo/1.0.8/uo/report?continue=0&id=0&level=0&mark=75.3484000000008&shares=0&tick=1526116990&uid=9273299&key=347472112f77bb701e500d50e7e9b72a HTTP/1.1  
Host: mas.wanzhushipin.cn  
Content-Type: application/x-www-form-urlencoded  
Connection: keep-alive  
Accept: */*  
User-Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 11_0_3 like Mac OS X) AppleWebKit/604.1.38 (KHTML, like Gecko) Mobile/15A432 MicroMessenger/6.6.6 NetType/WIFI Language/zh_CN  
Referer: https://servicewechat.com/wx3c889b4f402e924e/32/page-frame.html  
Accept-Language: zh-cn  
Accept-Encoding: br, gzip, deflate 

==== 第二次测试 ====  


https://mas.wanzhushipin.cn/uo/1.0.8/uo/report?continue=0&id=0&level=0&mark=68.68040000000063&shares=0&tick=1526120649&uid=9273299&key=cb1f330876880d072f8932f8bb00fdb8

continue=0&id=0&level=0&mark=68.68040000000063&shares=0&tick=1526120649&uid=9273299&key=kivi2018

cb1f330876880d072f8932f8bb00fdb8

==== 第一次测试 ====  
https://mas.wanzhushipin.cn/uo/1.0.8/uo/report?continue=0&id=0&level=0&mark=75.3484000000008&shares=0&tick=1526116990&uid=9273299&key=347472112f77bb701e500d50e7e9b72a  
原数据  
continue=0&id=0&level=0&mark=75.3484000000008&shares=0&tick=1526116990&uid=9273299&key=kivi2018  
md5结果  
347472112f77bb701e500d50e7e9b72a 

可以确定加密方法就是 ↓ ↓ MD5 ↓↓

continue=0&id=0&level=0&mark=75.3484000000008&shares=0&tick=1526116990&uid=9273299&key=kivi2018