iOS Application Hardening & Anti-Reversing Defenses: A Technical Reference for arm64/arm64e
Saud Aljaloud · Zenodo (CERN European Organization for Nuclear Research) · 2026
This document is a comprehensive technical reference on hardening iOS applications against reverse engineering, tampering, and dynamic instrumentation on 64-bit (arm64/arm64e) platforms, covering iOS 15 through iOS 26. Building on and substantially expanding the OWASP MASVS-RESILIENCE knowledge articles from the Mobile Application Security Testing Guide (MASTG), it provides an in-depth treatment of Mach-O binary internals, code-signing and trust-chain verification, jailbreak and simulator detection, anti-debugging and anti-hooking techniques, Frida and instrumentation-framework detection, obfuscation strategies, and Apple's hardware-backed security primitives (Pointer Authentication Codes, the Secure Enclave, and AMFI). Each defensive technique is presented with its underlying methodology, implementation guidance in Swift, Objective-C, and assembly, and an honest assessment of its strengths, known bypasses, false-positive risk, and runtime performance cost. The work is intended as both a practitioner's implementation guide and a systematized reference for security researchers, mobile application penetration testers, and reverse engineers studying the current state of iOS anti-tampering defenses.