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      Posts by Samuel Hopstock - Software Engineer

      What Testing 150 Banking Apps Taught Us About Mobile App Security

      8 minute read | April 15, 2025

      "It takes 20 years to build a reputation and five minutes to ruin it. If you think about that, you’ll do things differently.", Warren Buffett

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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