👨‍💻 speedyfriend67

Hey, I'm Jian. I like breaking iOS security mitigations and building weird tools with Swift.

My main focus right now is the Apple Security Bounty program—hunting logic bugs, kernel issues, and writing PoCs. If I'm not in a debugger, I'm probably rewriting a tool in Rust or C if possible

Recent Security Research

• CVE-2025-46280 (Assigned Dec 2025)
  • Impact: [Soon]
  • Description: [Soon]

The Tech Stack

• Reversing: IDA Pro, Ghidra, Hopper Disassembler
• Dev: Swift (SwiftUI), C
• Focus: No-JIT hooking, Mach-O parsing, Sideloading iPA

Projects

• IPASigner – Sign & inject tweaks into .ipa files on the fly.
• ReDyne – Attempting to build a proper native decompiler for iOS.
• APKRunner – iOS app for running native APKs (Work in Progress).
• UniGram – Simple app to scrape and push university notifications.

---

Contact: DM me on Discord, Twitter (@Speedyfriend433) or email speedyfriend433@gmail.com.

Note: I break things to learn how to fix them. No piracy, just research.

🇰🇷 / 🇺🇸