Patent ID: 8626207

Claim:
A method of checking for modification of a message transmitted by a transmitting mobile terminal, the method comprising: transmitting, by the transmitting mobile terminal, an original message to a receiving mobile terminal via a message server; receiving, from the message server, a first delivery report or read report when the original message has been delivered to the receiving mobile terminal without any modification to the original message, wherein the first delivery report or read report does not include an encoded adaptation field; receiving, from the message server, a second delivery report or read report when a modified message, which is a message modified by the message server based upon the original message, has been delivered to the receiving mobile terminal, the second delivery or read report comprising an encoded adaptation field to report information about modification of the original message; parsing the first delivery report or read report and second delivery report or read report; recognizing that the original message delivered to the receiving mobile terminal has not been modified from the original message when the encoded adaptation field is not included in the parsed first delivery report or read report; recognizing that the modified message delivered to the receiving mobile terminal has been modified from the original message when the encoded adaptation field is included in the parsed second delivery report or read report; obtaining the information about the modification of the original message by decoding at least one field value, which is encoded in a bit or character string form in the encoded adaptation field, and retrieving the information from a memory storing detailed information about various field values based on the decoded at least one field value when it is determined that the encoded adaptation field exists in the second delivery report or read report; and displaying the obtained information about the modification of the original message, wherein the original message comprises a multimedia message and the information about the modification of the original message is obtained by decoding the at least one field value in the encoded adaptation field of the received read report that comprises information about whether the modified message has been read by the receiving mobile terminal.