Well, I can't even get used to entering a password to my list of passwords by using pysafe or password safe or whatever they are called. My hands are too big, the keys are a bit to small and even a weak password only containing letters, no numbers or signs, is quite hard to enter every time I need another password. A mobile device like this is best secured when it is physically locked away or in your pocket and when an encryption is set to the whole filesystem. Everything else is just obscurity and no security. And for obscurity, I can even just delete the shortcut for conversations from my desktop.