Jonathan Zdziarski

Areas of Expertise:

  • iPhone
  • spam
  • machine-learning
  • algorithmic theory
  • forensics
  • hacking
  • security
  • speaking
Jonathan Zdziarski is better known as the hacker "NerveGas" in the iPhone development community. His work in cracking the iPhone helped lead the effort to port the first open source applications, and his book, iPhone Open Application Development, taught developers how to write applications for the popular device long before Apple introduced its own SDK. Prior to the release of iPhone Forensics, Jonathan wrote and supported an iPhone forensics manual distributed exclusively to law enforcement. Jonathan frequently consults law enforcement agencies and assists forensic examiners in their investigations. He teaches an iPhone forensics workshop in his spare time to train forensic examiners and corporate security personnel.

Jonathan is also Sr. Forensic Scientist for viaForensics, a Chicago-based forensic consulting firm where, among other things, he performs penetration testing of iOS applications for corporate clients. Jonathan gets paid to hack things for a living.

Jonathan's website is

Hacking and Securing iOS Applications Hacking and Securing iOS Applications
by Jonathan Zdziarski
January 2012
Print: $39.99
Ebook: $19.99

iPhone SDK Application Development iPhone SDK Application Development
by Jonathan Zdziarski
January 2009
Print: $34.99
Ebook: $27.99

iPhone Open Application Development iPhone Open Application Development
by Jonathan Zdziarski
Second Edition October 2008
Print: $39.99
Ebook: $31.99

iPhone Forensics iPhone Forensics
by Jonathan Zdziarski
September 2008
Print: $39.99
Ebook: $31.99

iPhone Open Application Development iPhone Open Application Development
by Jonathan Zdziarski
March 2008
Ebook: $31.99

Ending Spam Ending Spam (No Starch)
by Jonathan Zdziarski
June 2005
Print: $39.95

Webcast - iPhone Forensics: Live Recovery of an iPhone 3G[s]
September 16, 2009
Duration: Approximately 60 minutes. Cost: Free Video Part 1: Video Part 2: In this webcast, Jonathan Zdziarski will demonstrate the latest forensic method to conduct a live recovery of an iPhone 3G[s]. He will also demonstrate how to remove the...

Webcast - iPhone Forensics: Performing a Live Recovery Over USB
June 09, 2009
Duration: Approximately 60 minutes. Cost: Free In this webcast, Jonathan Zdziarski, author of iPhone Forensics, will guide you through an overview of his latest technique to recover the live user disk from an iPhone. Jonathan will demonstrate how...

Webcast - iPhone SDK Development: Tapping into Apple's New Audio Foundation Class
March 12, 2009
Duration: Approximately 60 minutes. Cost: Free The AVFoundation framework was introduced in version 2.2 of the iPhone SDK, and provides functionality for playing and mixing sound files, metering, and basic audio control. If you're adding simple sounds...

Webcast - iPhone Forensics 101: Bypassing the iPhone Passcode
September 11, 2008
In this live webcast, iPhone hacker and data forensics expert Jonathan Zdziarski guides you through the steps used by law enforcement agencies to bypass the iPhone 3G's passcode lock by creating a custom firmware bundle. Author of the upcoming book...

Webcast: Getting the iPhone Open Source Tool Chain
April 03, 2008
In this webcast, Jonathan A. Zdziarski, one of the original hackers of the iPhone and author of iPhone Open Application Development will demonstrate how you can use the iPhone open source tool chain to design third-party software that will run on this...

Webcast: iPhone Forensics Demonstration
April 17, 2008
With the iPhone quickly becoming the market leader in mobile devices, the need for law enforcement personnel to perform forensic analysis of these devices is beginning to surface. Unlike most other smart phones, the iPhone incorporates desktop-like features...

Webcast: Hacking and Securing iOS Applications
May 03, 2012
Duration: Approximately 60 minutes. Cost: Free In this webcast, Jonathan will demonstrate a number of ways to manipulate the runtime of App Store applications using free, open source tools. You'll see how application security is breached, how application...

Jonathan Zdziarski

"I see this book being a great tool for the person who wants to write their own personal applications for the iPhone, and who doesn't want to live with the restrictions that Apple is placing on the use and distribution of "official" applications."
--Thomas Duff, Duffbert's Random Musings