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Posts by Samuel Hopstock - Software Engineer

When Restricted Doesn’t Mean Secure: Google API Keys in Mobile Apps

10 minute read | February 3, 2026

Whether you are building a food delivery service using the Google Maps API, making your app ready for the AI age with the Gemini API, or taking advantage of the vast analytics and reporting capabilities provided by Firebase – third-party cloud APIs...

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    About Samuel Hopstock - Software Engineer

    3 min read | December 10, 2024

    Improve Your Mobile App Security in Less Than 5 Minutes

    Android iOS Technical AppSweep
    5 min read | November 15, 2022

    Call Graphs: The Bread and Butter of Program Analysis

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

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

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

    How to Securely Implement TLS Certificate Checking in Android Apps

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

    Insecure TLS Certificate Checking in Android Apps

    Android Technical Protection Dexguard
    When Restricted Doesn’t Mean Secure: Google API Keys in Mobile Apps https://www.guardsquare.com/blog/google-api-key-restirctions-mobile-app-security
    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