Hello everyone, This is my first blog post. Many of my friends suggested me to get into Android Security. I started learning android security and learned many things, but I faced a lot of problems. So I wanted to create a series of blog posts to guide those peeps who wanna get into android security. You know what? There are fewer resources about android security on the Internet. This article will explain some android internals, which helps us to understand the android architecture. I’m a complete newbie in android security, So pardon me if there any mistake in this article, or you can correct me if there’s any mistake in this article.