I've noticed that password protection isnt an option at present. I understand that in a way each document is mildly protected due to each user requiring a google account with a login procedure (password). 

However I work in the medical industry where sensitive information is being communicated and displayed. The physiotherapy world is governed by the CSP (Chartered Society of Physiotherapy) and the HPC (Health Professionals Council) who strictly stipulate that all data/docs must be individually encrypted. Google docs is an awesome tool to keep communication with coaches etc on injury status and booking time slots etc - however at present the security is not high enough to use it within our industry. If a "password protect" function was enabled this would revolutionise the way physios in sport could work.

Are there plans to password encrypt/protect? As already stated google docs is not robust enough yet to meet CSP & HPC standards - however if this simple function was added it would meet the necessary criteria and save so much hassle for the medical world ie. emailing excel protected sheets amongst ourselves (yawn).

Please please please can you add this at some point?

Many thanks, Oli