Passwords and online file sharing can be a major security risk. That's why it's important to add an authentication layer to your online conversion process. Some possible solutions include using services like Dropbox or Google Drive. You can create private document folders and only share the folder contents with specific people. You can also encrypt your file with a password or use a secure PDF creation tool like Adobe Acrobat Pro or SumoMe PDF Creator. There are multiple ways to password protect your conversion files, so find the one that suits your needs and make sure to always use a strong password!