I am new to Boxcryptor and barely installed it. I heard and read about it and it sounds awesome, however I have some concerns before I start using it. How safe are the keys? lets say I use this for my linux laptop and my windows desktop, and some how my laptop HDD got destroyed. Do I loose access to the keys for my files? what if somehow BOTH computers fail and I loose all my boxcryptor files, do I loose all my keys to decrypt my files permanently? Basically, if I use it on a device and that device brakes, how can I get my files back from being encrypted. Is there a way to backup the keys or???