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Posts by Samuel Hopstock - Software Engineer

Remove the Constraints of iOS App Attest and DeviceCheck

16 minute read | July 1, 2025

There is an assumption in developer circles that the iOS platform is inherently more secure than Android. Various reasons exist for why this bias persists - Apple’s closed ecosystem, restrictions on user customization, and stringent App store...

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    About Samuel Hopstock - Software Engineer

    13 min read | November 15, 2022

    Call Graphs: The Bread and Butter of Program Analysis

    Android Technical Dexguard ProGuard & R8
    21 min read | May 10, 2022

    Who You Gonna Call? Behind the Scenes of JVM Method Invocations

    Android Technical Dexguard ProGuard & R8
    19 min read | January 18, 2022

    How to Securely Implement TLS Certificate Checking in Android Apps

    Android Technical Protection Dexguard
    15 min read | December 21, 2021

    Insecure TLS Certificate Checking in Android Apps

    Android Technical Protection Dexguard
    Improve Your Mobile App Security in Less Than 5 Minutes https://www.guardsquare.com/blog/improve-mobile-app-security
    Call Graphs: The Bread and Butter of Program Analysis https://www.guardsquare.com/blog/call-graphs-the-bread-and-butter-of-program-analysis
    Who You Gonna Call? Behind the Scenes of JVM Method Invocations https://www.guardsquare.com/blog/behind-the-scenes-of-jvm-method-invocations
    How to Securely Implement TLS Certificate Checking in Android Apps https://www.guardsquare.com/blog/how-to-securely-implement-tls-certificate-checking-in-android-apps
    Insecure TLS Certificate Checking in Android Apps https://www.guardsquare.com/blog/insecure-tls-certificate-checking-in-android-apps