rsa-crypto-android

Demonstration of the RSA cryptography on various versions of the Android. It covers following operations:

• Key pair generation
• Encryption
• Decryption
• Key derivation

Why RSA?

We closed RSA 2048 because it seems to be supported on the most versions of the Android.

Overview of the relevant Android API changes

API 18

Android Keystore provider feature that was introduced in Android 4.3 (API level 18).

API 19

Supports other than 2048bit RSA keys in generateKeyPair().

API 23

Keystore redesign in Android M (fingerprint authorization introduced etc.)