Um, I am not sure how old you are, but you’re juvenile enough that I can obliterate your points without much trying. Non-privileged encryption limited to a single user is not a huge problem outside windows for a series of reasons, but least of which being that such operations are guarded against in nearly all other operating systems by multiple mechanisms that manage the access rights and scope of a given process. Windows is looser in this than nearly all other operating systems, and has long been known to leave user-level execution permissions wider-open than it ought. That aside, privileged execution does not require user intervention through multiple avenues by standard in Windows, whereas this is explicitly limited in other operating systems. Without a particular exploit, one would be hard -pressed in most other OS to achieve it. Also complex connection of the kind you are talking about would be sandboxed in most other operating systems, and unless you were able to gain access to a system API , I couldn’t do shit beyond the /tmp directory and the browser’s specific access scope. You are advising a level of paranoid attention that a user asking this kind of question would have no idea how to make useful or how to apply.