You can transfer files without user registration. Uploaded files' filenames and contents are encrypted before being stored on server. No one (even administrator) can know original filenames and contents of stored files.
Uploading the file will generate a temporary URL for download and password. The file can be downloaded from this URL.
Notice The file will be encrypted upon upload. You can download the file up to 8 times. The uploaded file will be deleted after 72 hours.