Data transmission apparatus and method for management of user identification data allocated to image data

A data transmission apparatus provided in a data processing device connected to a storage management device via a transmission line, for transmitting image data, captured by the data processing device, to the storage management device via the transmission line together with user identification data allocated to the image data, comprising:

• a user identification selection unit which selects a specific operator ID for an operator who uses the data processing device to process the image data to be copied or transmitted, and selects specific owner IDs for owners who are authorized to access the image data;
• and
• an authorized user management unit which stores user identification data, inclusive of operator IDs and owner IDs correlated to the data processing device, in a storage device each time image data is captured, and manages allocation of the stored user identification data to each of the image data by reading items of the user identification data from the storage device in response to the selections by the user identification selection unit and displaying the user identification data items.