http://portecle.sourceforge.net/

http://www.bouncycastle.org/latest_releases.html

http://docs.oracle.com/javase/8/docs/technotes/guides/security/crypto/CryptoSpec.html#KeystoreImplementation
http://docs.oracle.com/javase/8/docs/technotes/guides/security/crypto/CryptoSpec.html
http://docs.oracle.com/javase/8/docs/technotes/guides/security/crypto/HowToImplAProvider.html