Analyzing RSA Encryption in CTF Challenge: From APK Reverse Engineering to Traffic Decryption
Problem Overview
The challenge provides two files: an APK and a pcapng packet capture. The solution requires analyzing network traffic and reverse engineering the encryption implementation.
Traffic Analysis
Opening the pcapng file reveals standard TCP traffic. Following TCP streams and decoding the hex content exposes the application protocol:
...
Posted on Fri, 05 Jun 2026 16:35:37 +0000 by hsn