With the Increasing use of Machine Learning in Android applications, more
research and efforts are being put into developing better-performing machine
learning algorithms with a vast amount of data. Along with machine learning for
mobile phones, the threat of extraction of trained machine learning models from
application packages (APK) through reverse engineering exists. Currently, there
are ways to protect models in mobile applications such as name obfuscation,
cloud deployment, last layer isolation. Still, they offer less security, and
their implementation requires more effort. This paper gives an algorithm to
protect trained machine learning models inside android applications with high
security and low efforts to implement it. The algorithm ensures security by
encrypting the model and real-time decrypting it with 256-bit Advanced
Encryption Standard (AES) inside the running application. It works efficiently
with big model files without interrupting the User interface (UI) Thread. As
compared to other methods, it is fast, more secure, and involves fewer efforts.
This algorithm provides the developers and researchers a way to secure their
actions and making the results available to all without any concern.

By admin