新浪实时数据用什么方式加解密,想用一下这个数据

http://finance.sina.com.cn/realstock/company/sh600000/hisdata/2014/04.js

var MLC_sh600000_2014_04="IC+4ECgUQTMPwOWB6GwVwg8JYqnB8QH+MAd8+2XEQ5MjgEExCEYAxX5cgld2nkBEhE8hAXk5TMwjtkRB+EbNLChRc2HYRAhSPgD3JnAhvm3ALQcIOwh8dagvz3RPgHIx9B8FJVtBI39M6AX0H4FwjHR3A0uat5ARCu8JIGf0hFTiaXQg2KNgdIGkC2FCQeBcnJpEhR4EKKHUhnWug

BASE64编码看上去像是