René Mayrhofer

Android security trade-offs: Lock states I know it has been far too long since my last post in the “series” (not much of a series if it takes over a year between posts) on Android security trade-offs.

This is a confession.

Why This blog post was triggered by a discussion on Twitter (which seems to become a habit these days…).

Why Zoom is the video conferencing solution we currently (summer term 2020) use at JKU Linz for remote teaching while on-premise hosted solutions are being evaluted.

Why For analysing what devices do on a network - specifically the shared medium of a wireless LAN - just packet tracing based on IP address is often not sufficient.

Git commands that are not intuitively found: git log --graph --all --oneline --reflog saves the day then the HEAD reference is lost in a weird merge (e.g. when a submodule wasn’t pushed but the enclosing repo was).

Introduction GadgetBridge for Android is an app that allows syncing locally with various wearable devices such as wristbands and watches, without requiring an account with the respective device manufacturer cloud.

Disclosure of vulnerabilities I generally don’t pitch in on the “responsible PoC disclosure” debate, as I don’t actively contribute to the area and rather let others like https://www.twitter.com/maddiestone, https://www.twitter.com/taviso, https://www.twi…

Android security trade-offs: Rooting “Rooting” has been part of the Android ecosystem pretty much since its creation.

Android security trade-offs The Android ecosystem is highly diverse, complex, and has many different stakeholders typically not visible in the limelight.

Why Tor allows to anonymize Internet traffic through onion routing, typically via 3 separate hops.

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Relate During my time at Lancaster University, I was working on the Relate research project, which produced hard- and software for relative spatial positioning.

Table of Contents Short Summary Context-based authentication The Toolkit Overview Archival copy of old website Short Summary OpenUAT provides combinations of cryptographic primitives and techniques with methods from sensor data analysis to create new auth…

Table of Contents A Framework for Context Prediction Project goal Current status Source code and documentation Approach First Results Publications A Framework for Context Prediction Current mobile devices like mobile phones or personal digital assistants…

Table of Contents Short Summary Project goal Status Source code Publications Demonstration application 1: Send it there: Secure file transfer and chat Demonstration application 2: IPSecME: IPSec Made Ease Short Summary The concrete problem we investigated…

Project goal Gibraltar firewall aims to produce a software firewall package that runs directly off CD-ROM or other read-only media.

Executive summary This project provides an Android application to configure some of the IPv6 kernel settings.