Tranxfer is a company that develops a web-based file transfer service intended to enable users to send and receive files via virtual mailboxes. Every file uploaded goes through an automatic virus scan and then is encrypted with a key, which is unknown even to the administrators of Tranxfer. A security code is generated and sent to the recipient in the form of an SMS or an email to view the file. The integrated download manager of Transxfer enables users to resume downloads that are interrupted in between.