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Posts by Jan Seredynski - Security Researcher & Pentester

Bypassing the Key Attestation API with Remote Devices

15 minute read | January 27, 2026

If you are a frequent reader or a Guardsquare customer, you probably have realized by now the difficulty of detecting in deterministic ways when a device has potentially gone rogue. These can include when a user manipulates a device with the goal of...

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    About Jan Seredynski - Security Researcher & Pentester

    4 min read | October 10, 2023

    Device Binding for Enhanced Mobile App Authentication

    AppSweep Security testing Thought leadership General
    4 min read | March 21, 2023

    How to Protect the Android Accessibility Service

    Android Technical Dexguard Security research
    6 min read | November 2, 2022

    How Development Skills Translate to Reverse Engineering: Using LLDB to Reverse Engineer an Android App

    Android Technical
    3 min read | September 28, 2022

    What is TrollStore? Mitigations for iOS Applications

    iOS iXGuard Thought leadership
    9 min read | August 10, 2021

    Demystifying Typical Mobile Game Hack

    iOS Protection iXGuard Security research Gaming
    4 min read | March 15, 2021

    Cheat Prevention: How to Stop Mobile Game Memory Tampering

    iOS Technical Protection iXGuard Gaming
    2 min read | March 15, 2021

    How hackers use LLDB to cheat with non-jailbroken devices

    iOS Technical Protection iXGuard Gaming
    5 min read | February 1, 2021

    Protection Against Multiplayer Game Hacking

    Technical Security research Gaming
    Attestation on Android and iOS Is Not as Secure as You Think https://www.guardsquare.com/blog/android-and-ios-app-attestation
    Device Binding for Enhanced Mobile App Authentication https://www.guardsquare.com/blog/mobile-device-binding
    How to Protect the Android Accessibility Service https://www.guardsquare.com/blog/protecting-against-android-accessibility-services-threats
    How Development Skills Translate to Reverse Engineering: Using LLDB to Reverse Engineer an Android App https://www.guardsquare.com/blog/how-development-skills-translate-to-reverse-engineering
    What is TrollStore? Mitigations for iOS Applications https://www.guardsquare.com/blog/trollstore-mitigations-for-your-ios-application
    Demystifying Typical Mobile Game Hack https://www.guardsquare.com/blog/demystifying-typical-mobile-game-cheats
    Cheat Prevention: How to Stop Mobile Game Memory Tampering https://www.guardsquare.com/blog/cheating-easy-how-prevent-mobile-game-memory-tampering
    How hackers use LLDB to cheat with non-jailbroken devices https://www.guardsquare.com/blog/how-hackers-use-lldb-cheat-non-jailbroken-devices
    Protection Against Multiplayer Game Hacking https://www.guardsquare.com/blog/attacking-network-layer-multiplayer-games