After the update of the certificate of LtcRabbit.com(active from Apr 9 2014) it's resolved as not trusted on Android.
It seems the certificate is issued from a trusted authority but for some reason Android doesn't accept it.
You can check this by opening the Chrome on your Android device (Chrome is using the device certificates) and open the https://ltcrabbit.com.
If you can open the link without any warnings so you are fine and the LTCRabbit Monitor app will also works on your device.
If you cannot you need to continue reading.
There is a way to fix this without waiting for Android to add the new root certificate into the trusted certificates.
Here is the list of the public keys that should be installed to add the latest certificate chain.
Here you can find the exported certificates (Use right click->"Save as" on PC):
They have to be installed in the order above to work.
If you read this on the device (I'm doing it with Chrome) clicking on the links above directly try to import the certificate so it's much easier than the steps bellow with saving of the files.
How to install on Android 4.0 and above:
- Save the three certificates on the device.
- Go to Settings -> Security ->Install from storage
- Select the certificate and you will see dialog that asks for certificate name. Enter some name. Credential use should be "VPN and apps".
- Click "OK"
- Repeat this for all certificates.
Keep in mind that there is a Android 4.4 (KitKat) bug which is reporting that "A third party is capable of monitoring your network activity, including emails, apps, and secure websites. A trusted credential installed on your device is making this possible.".
Here is the bug reported - https://code.google.com/p/android/issues/detail?id=62076
You will see this notification after installing the "PositiveSSL CA 2".
If you want to export the certificates on your own you can open this window following these steps (Firefox):
Click on the locker in front of the address and in the showed dialog click on "More Information".
You will see the page info dialog opened and need to click on the "View Certificate".
You will see the certificate viewer window. Click on "Details" tab.
Numbers bellow are showing the order that the exported certificates should be imported in Android.
You can see the Export button highlighted. This is what you need to use to export the certificates.