Simple library for the "right" defaults for AES key generation, encryption,
and decryption using 128-bit AES, CBC, PKCS5 padding, and a random 16-byte IV
with SHA1PRNG.
Fixes for the RNG as per
http://android-developers.blogspot.com/2013/08/some-securerandom-thoughts.html
This software is provided 'as-is', without any express or implied
warranty.