The Android Hacker’s Handbook team members chose to write this book because the field of mobile security research is so “sparsely charted” with disparate and conflicted information (in the form of resources and techniques). There have been some fantastic papers and published resources that feature Android, but much of what has been written is either very narrow (focusing on a specific facet of Android security) or mentions Android only as an ancillary detail of a security issue regarding a specifi c mobile technology or embedded device. Further, public vulnerability information surrounding Android is scarce. Despite the fact that 1,000 or more publicly disclosed vulnerabilities affect Android devices, multiple popular sources of vulnerability information report fewer than 100. The team believes that the path to improving Android’s security posture starts by under-standing the technologies, concepts, tools, techniques, and issues in this book.