The library uses AES-128-CBC encryption and does not use HTTPS at all which has several advantages:
- - Less resource intensive approach than using SSL
- No need to hard code the SHA1 fingerprint of a SSL certificate (which would change after some time)
- No possibility for service providers like Google or Simplepush to intercept data
The library can be found here and an example can be found here.
You can get the Android app on https://simplepush.io.
The app will cost a small one-time fee after the trial period has expired.