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AndroidKeystore API 4.1

I am using AndroidKeystore as a provider in my current project to securely store private keys. Now I want to make my application available for older versions of Android up to version 4.1 (API version 16). Therefore, I need to find an alternative for AndroidKeystore , but it is hardly possible to find any suitable solution. Is there any recommendation on implementing / emulating / replacing AndroidKeystore functionality in these older versions?

In addition, KeyPairGeneratorSpec is available since v18. What will be the correct replacement in older versions?

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android security android-keystore android-developer-api
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I finally found a working solution. For Android 4.x, there is a credential storage service that can contain various secrets. The best description I've found so far is here

http://nelenkov.blogspot.de/2012/05/storing-application-secrets-in-androids.html

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