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      Posts by Samuel Hopstock - Software Engineer

      Attack of the Clones: Preventing Fake Mobile App Proliferation

      6 minute read | April 29, 2025

      Somewhere in the world, you might have an evil twin that steals money, abuses the innocent, and brings shame to your name. But while most ordinary citizens don’t have to worry about this seemingly far-fetched dilemma, the “evil twin” problem is an...

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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