title: protection of apk against transfer to another phone
body: <p>How to make protection for paid applications Google Play against transfer to another android phone? I tried to embed RSA code that Google Play gives, in my application as follows: <br> <code>public class MainActivity extends Activity 
  private static final String BASE64_PUBLIC_KEY = "MIIBIjANBgkqhkiG ... "; 
  ...
  }</code><br>
  as it is <a href="http://developer.android.com/google/play/licensing/adding-licensing.html" rel="nofollow">written here</a>, but it is still possible to transfer application.<br>
  In other words prohibit copying apk.</p>