Android Question Prevent APK from Unauthorised Reading

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DawningTruth

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Licensed User
To my understanding an Android APK is inherently insecure and can be read by anyone.

This is problematic as we want to keep our code secret as it uses some clever tricks we do not want copied. Further, we need to embed encryption keys in our APK which we don't want read.

Any thoughts on how best to protect the APK in 2020?
 
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KZero

Active Member
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Longtime User
there is many ways to protect your APK against manipulations

the easiest way is to use Obfuscation in B4A when releasing your APK
that will make the function and variable names harder to trace and understand

you can perform an integrity check to check if the APK is modified using this code
https://www.b4x.com/android/forum/threads/clasess-dex-integrity-check.40133/

if you are looking for a harder way you can encrypt your classes with a professional app such as DexProtector (a bit expensive) , it's compatible with B4A apps
 
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DawningTruth

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Thx @KZero, that DexProtector tool looks very powerful. In your experience, how hard is it for a hacker to crack the standard Obfuscation in B4A?
 
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AnandGupta

Expert
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Longtime User
This may help.

ProBundle

ProBundle contains all the following libraries: - ArchiverPlusZip v1.13 Based on the Zip4j library, this library allows to add, extract, update and remove files from a zip archive. It supports encryption and decryption (standard and AES), Zip64 format and split zip archives. It is compatible...
www.b4x.com

Regards,

Anand
 
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DawningTruth

Active Member
Licensed User
Thx @AnandGupta that clarifies
 
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DawningTruth

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Licensed User
Thx @AnandGupta that clarifies
 
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