Google has launched its own Android hacking contest with the first prize winner receiving $200,000 in cash. The contest is a way to find and destroy dangerous Android vulnerabilities before hackers exploit them in the wild. Contest will only award cash prizes to contestants who can successfully hack any version of Android Nougat on Nexus 5X and 6P devices. The catch here is that Google wants you to hack the devices knowing only the devices’ phone numbers and email addresses. For working of their exploits, contestants are allowed to trick a user into open an email in Gmail or an SMS text message in Messenger.
Source: https://thehackernews.com/2016/09/hacking-android-competition.html

