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I don't know the details for Android, but iOS will most definitely not allow you to directly access the fingerprint data, let alone upload it. By handling all biometric encryption/decryption in a separate processor (the 'Security Enclave'), that data is basically locked down to the physical device. To quote Apple Developer Documentation: To maximize ...


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I don't think it's bad design. In the following scenario, I think it is appropriate. class IControl { public: virtual void draw() = 0; }; class IButton: public IControl { pulic: virtual void click() = 0; }; class WinButton: public IButton { public: void draw() { cout<<"Windows button drawn"<<endl; } void click() { cout<<"...


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