Different types of keystore in Java
JKS
DKS
JCEKS
PKCS12
PKCS11
http://www.pixelstech.net/article/1408345768-Different-types-of-keystore-in-Java----Overview
android keystore type
.keystore vs .jks in android
Difference between .keystore file and .jks file
AndroidKeyStore
https://developer.android.com/training/articles/keystore.html