Cryptographic DRM Reverse Engineering and Circumvention

Engaged to perform a comprehensive security analysis of the digital rights management (DRM) system protecting a mobile phone-based digital content store. The work involved reverse engineering the DRM implementation, identifying and exploiting multiple independent weaknesses in the protection scheme, and producing a detailed catalogue of circumvention methods.

This engagement required analysis of cryptographic implementations, binary reverse engineering of mobile application code, and systematic documentation of each attack vector — combining reverse engineering, applied cryptography, and security analysis in a single engagement.