I'm an iOS hacker / security researcher from Switzerland.
I spend my time reverse engineering Apple's code, tearing apart security mitigations, writing exploits for vulnerabilities, or building tools that help me with that. Sometimes I speak about it at conferences, sometimes I do lengthy blog posts with all the technical details, sometimes my work becomes part of a jailbreak, and sometimes it never sees the light of day.


For anything important, please email me:
siguza@siguza.net (PGP key)

For casual chatter, hit me up on:
Mastodon: @siguza
Discord: siguza
Wire: @Siguza


Big list of iOS hacking resources: ios-resources
Build scripts for iOS-related things: ios-build
arm64 IOKit class dumper: iometa
iOS OTA firmware link tool: pallas.sh
iOS DeviceTree dumper/library: dt
Bits and pieces: dotfiles & shell aliases, bag of CLI tools

Web Presence

Please don't use these to reach out to me.
Just listing them to verify my identity.

GitHub: Siguza
Twitch: Siguza
Reddit: /u/Siguza
Stack Overflow: Siguza
Twitter: @s1guza

Checkra1n Logo


A semi-tethered BootROM jailbreak for A7-A11 on iOS 12.0 and up.
Biggest project I've ever been a part of, and by far the best team I've ever worked with.

Get it at checkra.in »

Hack Different Logo

Hack Different

A Discord server about all kinds of hacking, reversing and developing on and around Apple platforms. Relaxed atmosphere, plenty of cool people to hang out with. No tech support.

Join the Discord »

unc0ver Logo


An app-based jailbreak for all devices running iOS 11.0 through 14.3.
I'm not an active developer there, but I wrote the kernel exploit for iOS 13.0-13.5.

Website »

Spice Logo


An (unfinished) untether for iOS 11 by the Jake Blair team.

Source code »
Presentation » (by littlelailo)
acorn » (reimplementation by xerub)

TNS Logo

Totally Not Spyware

A web-based jailbreak for all 64-bit devices on iOS 10. Can be saved to webclip for offline use.
Created by Jake Blair, design by Foxlet.

Website » (Epillepsy warning!)
Source code »

Phœnix Logo


A jailbreak for all 32-bit devices on iOS 9.3.5. Created by tihmstar and myself.

Download » (requires a computer)
Exploit source (32-bit) »
Exploit source (64-bit) »

Bukkit Logo

Bukkit plugins

A long time ago, when Bukkit was still alive and I still had time to play games, I wrote some Minecraft server plugins. Maybe one day I'll find the time to rewrite them for a new mod API.

Individual project pages »

TWLan Logo


An even longer time ago, when browser games were hot, I was on the development team of the (fan-made) LAN-version of the browser game Tribalwars.

TWLan Forum »