iOS Application Security

Because the main executable is FairPlay-encrypted on disk, marked with cryptid 1 in its Mach-O header. The kernel only decrypts it in memory at launch, so the on-disk bytes are ciphertext. You must dump the decrypted image from a running process on a jailbroken device before static analysis works.

No. A client-side bypass is only a door opener. The real finding is whatever the backend lets you do once the check is flipped. If the server re-enforces the same decision, the bypass is cosmetic; if it does not, you have a genuine authorization gap to report.

Not to learn the methodology. This course teaches the full decrypt-observe-verify loop and the real commands without any device of your own. The course lab runs on a real jailbroken cloud iOS device that is coming soon, so you can practise even without owning jailbreakable hardware.

In the Keychain with an appropriate protection class. For a token that must not sync to iCloud or survive a backup, use kSecAttrAccessibleWhenUnlockedThisDeviceOnly. Storing tokens in NSUserDefaults or a bundle plist leaves them in plaintext and recoverable.

OWASP MASVS (Mobile Application Security Verification Standard) and its companion testing guide, the MASTG. Findings in this course map to MASVS areas such as STORAGE, NETWORK, CRYPTO, AUTH, PLATFORM and RESILIENCE so your reports speak the language reviewers expect.