HIT2012 Wargame Writeup : Mobile 1

There was a new catalog - Mobile added in this year HIT wargame. Although there are two problem in this  catalog , it can point out that mobile security is future trend in security.

Mobile 1 is an easy problem , there are only two things need to do.

First , unzip the apk file. Then open files one by one , then we can find some string in META-INF/CERT.RSA ."What is the guy's nickname in base64 format?" .So we can find the guy's nickname in article and encode it as base64 to get the key.

Reference to wiki , CERT.RSA is the certificate of the application