I know that android.utils.Base64 is only available as of API level8, but I’ve also heard of this Bouncy Castle Base64(org.bouncycastle.util.encoders.Base64).
Is this part of the android jar?
and if so what API level is it for?
Finally at what API is javax.crypto.* first used in android?
This is not an Android API, but you can take it from here: http://www.bouncycastle.org/java.html