Patent ID: 7493491

Claim:
A server connected with a terminal apparatus via a network, the server comprising: a first memory configured to store original data without a water-mark; a second memory configured to store a first water-mark associated with a folder ID of a folder which includes the original data associated with a document ID and with a first user ID indicating a predetermined user, and to store a second water-mark associated with the same folder ID as the first water-mark and with a second user ID indicating a plurality of users including the predetermined user; and a controller configured, when the user requests the server to display the original data on a display of the terminal apparatus by inputting the document ID and the first user ID, to determine whether the first water-mark and the second water-mark are stored in the second memory with respect to the document ID and the first user ID, to transform the original data into image data, to select the first water-mark as a priority with respect to the second water-mark when the first water-mark and the second water-mark are stored in the second memory with respect to the folder ID and the first user ID, to add the selected first water-mark to the image data, and to transmit the image data with the selected first water-mark to the terminal apparatus and when the first watermark is determined to not be store in the second memory with respect to the document ID and the first user ID, to obtain the folder ID of the folder which includes the original data associated with the document ID.