User:Apragin/Jay Freeman

Jay Freeman (also known as "saurik") is an American businessman and software developer. He is known for creating the Cydia software application and related software for jailbroken iOS. Jailbroken iOS is Apple's iOS operating system modified to allow installation and customization of software outside Apple's App Store system.

Education and early work
Freeman studied computer science and graduated from the College of Creative Studies at the University of California, Santa Barbara. In 2009 he was a doctoral student in computer science at UCSB.

He built Anakrino, a decompiler for .NET available in 2002. He co-authored a paper published in 2005 about a "Java runtime event specification and monitoring library." He has worked with Brian Fox on freelance projects.

iOS
In February 2008, Freeman released the initial version of Cydia, a software distribution and installation tool for jailbroken iOS. In May 2009, he added a store system to Cydia to allow developers to sell products. In September 2010, his company (SaurikIT, LLC) announced that it had acquired Rock Your Phone, Inc. (makers of Rock.app). SaurikIT and Rock Your Phone were the two largest providers of third party apps.

He has published tools for developers making software for jailbroken iOS. He made Cydia Substrate for iOS, a framework that developers use to help them modify iOS with extensions. He also made Cycript, a tool that developers use to inspect and modify applications on iOS and OS X.

He has developed software extensions for jailbroken iOS users to add features to iOS, including Apple File Conduit 2, Cycorder, CyDialer, Cydget, Cyntact, Cyueue, Five Icon Dock, Veency, and WinterBoard. He has also released Cydia Impactor for jailbroken iOS, a tool for removing personal data and "unjailbreaking" the device while preserving the iOS version.

He is a member of the iPhone Dev Team group, which has developed jailbreaks for iOS.

Android
Freeman has also done software development and security research on the Android operating system. In 2008, he ported Debian for use on an Android phone. In April 2013, he built an implementation of a root (jailbreak) for Google Glass and published an analysis of the ramifications of rooting Google Glass. In May 2013, he published a version of Cydia Substrate for Android. In July 2013, he published an analysis and implementation of "Master Key" vulnerabilities for Android.

Politics
Freeman has been an advocate for Isla Vista, California (next to UCSB) evaluating self-governance options including the option of becoming a city.