To build-up trust in the encryption-algorithm, you can verify the encrypted data-files with GnuPG (http://www.gnupg.org) for example.
Just call
$> gpg –-list-packets <datafile>
on command line or test de- and encrypting directly:
$> gpg --decrypt <datafile> > tmp $> gpg --symmetric --armor --cipher-algo AES tmp $> java -jar kiskis.jar -file tmp.asc $> rm -i tmp*