Hmm there are a few other threads about this subject. It is also related to authentication about which we have also some threads.

One problem with cryptography (don't call it 'encryption') is that it only works if you trust it. In order to trust it, you have to understand it. While making it as less complex as possible is a good aim, many people won't understand how cryptography works. So a solution which handles this must keep that in mind. (See for example how Mozilla Firefox deals with SSL and the various implications of this.)

Some related threads:
http://talk.maemo.org/showthread.php...689#post381689
http://talk.maemo.org/showthread.php?t=32672
http://talk.maemo.org/showthread.php?t=33304