Patent ID: 7457512

Claim:
An information recording device comprising: an input unit entering input data; a transmission unit sending the data entered by the input unit; a reception unit receiving information data; a received data management unit adding a flag indicating the received information data to the information data received by the reception unit; a recording unit recording the information data received by the reception unit and the flag; a control unit controlling the information data recorded by the recording unit to be changed to overwritable data in accordance with the flag recorded by the recording unit; an imaging unit taking an image; and a transmitted data management unit adding a device-inherent ID to the video data of the image taken by the imaging unit when the video data is transmitted by the transmission unit, the device-inherent ID indicating that the video data was taken by the information recording device, wherein, when the reception unit receives first data and second data attached with the device-inherent ID, the control unit controls to provide a priority for the second data rather than the first data in overwriting both the first and second data.