| 摘要 |
A method for controlling access to a telecommunicable data file provided by a content provider to one or more authorized recipients; comprising the steps of: encrypting the data file, associating with the encrypted data file a toll server software device; the toll server software device comprising; means for receiving authorization data from a potential recipient means for communicating the authorization data to a toll server for validation, and means for decoding the data file if authorization is validated, uploading the encrypted data file and toll server software device to a communications network accessible by recipients, downloading the encrypted data file and toll server device to a recipient requiring access to the data file, requesting authorization data from the recipient and communicating the authorization data to a toll server for validation, and, on successful validation, downloading a decryption key suitable for decrypting the data file from the toll server to the toll server device, and decrypting the data file. Optionally, the validation of authorization data may incorporate completion of a financial transaction, this may be effected through use of premium rate telephone lines using the novel method and system of the invention. |
