Interesting. I haven't seen these sorts of problems in my company. At least nothing that couldn't be fixed quickly for data sharing. We even deal with passing data externally. Usually the setup is something like a dedicated FTP server that is configured to allow SFTP for whitelisted IPs, credentials for the file creators/consumers which only give them limited access to a single folder. I think there's a couple other steps in there. Also, this is B2B, and wouldn't be a good B2C model.