This second blog post explains how to recover the whitebox's key from the obfuscated library libnative-lib.so
This first blog post describes the protections in the challenge r2-pay.
Analysis of Tencent Legu: a packer for Android applications.
This blog post deals with QBDI and how it can be used to reverse an Android JNI library
Android crackme that uses system's internals
Internal structures of OAT format
Internal structures of VDEX format
This post explains how to use Frida gadget on a non-rooted device.