![](https://cdn.statically.io/img/i.sstatic.net/aPIhh.jpg?s=128&g=1)
Jeff is a security architect and mobile security engineer who works with Android, iOS and Windows Phone/Windows RT. In the past, he's worked with Blackberry and Windows Mobile. Jeff has nearly 20 years of experience with C and C++, and over 6 years with Objective C. His experience includes implementing secure containers, secure transports and device management on a wide array of platforms including mobile handsets to surveillance drones.
Jeff's formal education includes undergad work at the University of Maryland, and graduate work at Johns Hopkins University. He majored in Computer Science at both schools.
Stack Overflow
Q&A for professional and enthusiast programmers
Super User
Q&A for computer enthusiasts and power users
Law
Q&A for legal professionals, students, and others with experience or interest in law
Android Enthusiasts
Q&A for enthusiasts and power users of the Android operating system
Personal Finance & Money
Q&A for people who want to be financially literate
Internet of Things
Q&A for builders and users of networked sensors and control devices in the contexts of smart homes, industry automation, or environmental sensors
Meta Stack Exchange
Q&A for meta-discussion of the Stack Exchange family of Q&A websites
Reverse Engineering
Q&A for researchers and developers who explore the principles of a system through analysis of its structure, function, and operation
Raspberry Pi
Q&A for users and developers of hardware and software for Raspberry Pi
Aviation
Q&A for aircraft pilots, mechanics, and enthusiasts
Ask Patents
Q&A for people interested in improving the patent system
DevOps
Q&A for software engineers working on automated testing, continuous delivery, service integration and monitoring, and building SDLC infrastructure
Home Improvement
Q&A for contractors and serious DIYers
Hardware Recommendations
Q&A for people seeking specific hardware recommendations
User Experience
Q&A for user experience researchers and experts
Motor Vehicle Maintenance & Repair
Q&A for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles
Monero
Q&A for developers and users of the secure, private and untraceable cryptocurrency Monero
Science Fiction & Fantasy
Q&A for science fiction and fantasy enthusiasts
History of Science and Mathematics
Q&A for people interested in the history and origins of science and mathematics
Movies & TV
Q&A for movie and TV enthusiasts
Space Exploration
Q&A for spacecraft operators, scientists, engineers, and enthusiasts
Emacs
Q&A for those using, extending or developing Emacs
Database Administrators
Q&A for database professionals who wish to improve their database skills and learn from others in the community
Writing
Q&A for the craft of professional writing, including fiction, non-fiction, technical, scholarly, and commercial writing
Computer Science
Q&A for students, researchers and practitioners of computer science
Network Engineering
Q&A for network engineers
Electrical Engineering
Q&A for electronics and electrical engineering professionals, students, and enthusiasts
Bitcoin
Q&A for Bitcoin users, developers, and enthusiasts
TeX - LaTeX
Q&A for users of TeX, LaTeX, ConTeXt, and related typesetting systems
Tor
Q&A for researchers, developers, and users of Tor