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Lukas Arnold

@lukasarnld.bsky.social
192 followers 140 following 13 posts

Researching iOS' Cellular Protocol Stack @ SEEMOO Studying CS @tuda.bsky.social 🌍 lukasarnold.de

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Lukas Arnold @lukasarnld.bsky.social · 08/04/2026
The fourth iteration of the „Objective for the We“ event will be held in Berlin at the end of July. Apply to join us for two days of free trainings and talks that teach Apple security research in a beginner-friendly way.
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Lukas Arnold @lukasarnld.bsky.social · 27/10/2025
I just published the slides of my #OBTS v8.0 talk about Apple's #C1 baseband. Our C1 #binja loader is now available on GitHub, and you can find a recording on YouTube. lukasarnold.de/posts/obtsv8...
lukasarnold.de
OBTS v8.0: Diving into C1
Learn more about my talk “What’s at the Bottom of the Sea, One Baseband? - Diving into the C1” at eight edition of the Objective by the Sea conference.
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Lukas Arnold @lukasarnld.bsky.social · 16/10/2025
Thanks for joining my #OBTSv8 talk about Apple's novel #C1 & #C1X basebands. I'm glad to be back at this awesome conference. We'll release the slides and tooling in the coming days.
My first talk slide. It has the title "What’s at the Bottom of the Sea, One Baseband?". The talk was held by Lukas Arnold on the 16th September 2025. The slide includes decorative emojis of the sea floor.
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Lukas Arnold @lukasarnld.bsky.social · 24/07/2025
I‘m glad to be back at #OBTS v8.0 with a talk about Apple‘s #C1 baseband and carrier profiles objectivebythesea.org/v8/talks.htm...
objectivebythesea.org
#OBTS v8.0: Talks
Conference Talks
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Lukas Arnold @lukasarnld.bsky.social · 14/06/2025
We've released CellGuard 1.6.0, our iOS app, to make use of the iPhone's internal baseband communication. The update enhances support for dual SIM, adds new #C1 packet types, automatic navigation to sysdiagnoses, and more: cellguard.seemoo.de/docs/changel...
cellguard.seemoo.de
Changelog
Changelog # 1.6.0 # CellGuard now supports dual SIM setups. When two SIM cards are activated simultaneously, the app can distinguish between their connected cells and packets. We’re working on extract...
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Lukas Arnold @lukasarnld.bsky.social · 28/12/2024
Jiska's first lighting talk at #38c3 will show you how to get started with CellGuard to detect fake base stations
Detecting Fake Base Stations with CellGuard on iOS

Jiska Classen
Joined work with Lukas Arnold, Matthias Hollick, and the CellGuard Team

@neahrdine.bsky.social

Hasso Plattner Institut - Technische Universität Darmstadt - ATHENE (National Research Center for Applied Cybersecurity) - Open6GHub
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Reposted by Lukas Arnold
jiska @naehrdine.bsky.social · 06/12/2024
It's great seeing students I've had the privilege to supervise deliver amazing talks at #OBTS - and for Lina it's even her first conference talk! Check out their recordings on YouTube: youtube.com/@objectiveseefoundation
Lukas Arnold - Trace the BaseLina Wilske - Unraveling Time
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Lukas Arnold @lukasarnld.bsky.social · 06/12/2024
Thanks for joining my talk about iPhone basebands at #OBTS #OBTSv7. It’s an awesome experience in Maui, and I’m looking forward to the rest of the conference. You can find the slides at lukasarnold.de/pdfs/obts7-t...
Objective by the Sea v7.0  Trace the Base: Unraveling the iPhone’s Baseband Architecture to Defend Agalnst Cellular Attacks  Lukas Arnold - December 5th 2024
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