>You'd have to figure out some kind of secure key sharing mechanism between phones, tablets, web browsers, and e-readers.Yeah, it's not like Amazon can afford security experts to work on this or anything.
>Or, you can trust that a position in a book (bookmarks, notes, etc.) is not sensitive information that really needs to be encrypted.
This is an ignorant position that has been proven wrong over, and over, and over again. Private data should be secure by default, because otherwise eventually someone will figure out how to abuse it. This is a lesson form bazillion fraud schemes and social engineering hacks everyone in tech should have learned by now.
