How to prevent my APK from decompiling? I have enabled proguard but still, I can decompile APK. Is there any way to build APK that cannot be decompiled? Or any way to store the constant value that cannot be identified when APK is decompiled?
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It's not possible. If the attacker has access to the compiled code, they can decompile it. What you can do, is make it a client/server app, and keep the secret parts on the server side. – S.L. Barth is on codidact.com Nov 14 '17 at 10:54
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Then how to transfer encryption keys safely? – Nandha Kumar Nov 14 '17 at 10:56
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Hm... maybe [this question](https://stackoverflow.com/q/14570989/812149) can help. For the encryption, consider a public-key encryption scheme. Communication between the app and a server should be secured using SSL/TLS, which has public-key encryption built in. – S.L. Barth is on codidact.com Nov 14 '17 at 10:59
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1Ok. I will try some key exchange patterns. – Nandha Kumar Nov 14 '17 at 11:04