I have data that, while not in an of itself sensitive, I would like to share securely with research colleagues. What is the best way to go about this? There are at least three options that I can think of scp (over ssh), ftp/sftp http/https. I'm reasonably Unix-savy, but not Apache savy. I'd like access to the data to be password protected. It won't be accessed by a large number of people, but I don't want to create accounts for each person that needs access. What is the simplest and most (reasonably) secure way to do this? If I set up a user account how do you provide the password to someone? Over e-mail? FYI data sets are frequently greater than 100MB and sometimes ~5-6GB. Thoughts?