I am using Tresorit on Mac OS X and iPhone.
When I am using it there is always applied client-side encryption before posting the file to cloud. The key used for encryption is AES-256 and CFB mode of operation is used.
But I can't figure out how is the key generated and where is stored. Also how is the key transferred or generated on iOS when you would like to access files from two different OSs.
The only information you are providing in registration is your email and password. There is application Tresorit.app on Mac OS X where I tried to find the clien-side encryption key but with no success (there are only certificates of Tresorit and Starcom).
So how this works? Where I can find my AES-256 key?