iOS Internals · Course 1
Inside iOS
How an iPhone is built, signed, sandboxed and kept up to date.
- 1How iOS Is Built12 min · Meet the layers inside an iPhone and the chain of trust that starts it up.
- 2Code Signing & the App Store12 min · See why every iPhone app must carry a signature, and who checks it.
- 3The Sandbox & Entitlements13 min · Look inside an app's container and the signed permissions that open extra doors.
- 4Updates & Jailbreaks13 min · Learn why updates matter, how long iPhones get them, and what a jailbreak breaks.
- 5Challenge: The Free Gems Offer15 min · Check a website's free-gems offer for your cousin and explain what it would break.
Hands-on
Do it on the simulated phone
Every lesson has a lab you can try in your browser, plus questions that earn points toward the Core Diver badge.
Start lesson 1