NETWORK SYSTEM, TRANSMISSION/RECEPTION METHOD, TRANSMITTER, RECEIVER AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To safely transmit data to a called party independently of the skill of an end user or the like. SOLUTION: A data managing means 1b of a transmitter 1 unitarily manages data stored in a storage device 1a or 3. When the transmission of data is requested from terminal equipment not shown in Figure connected to the transmitter 1, a data collecting means 1c collects the desired data while referring to the data managing means 1b. A security processing means 1d performs security processing corresponding to the secrecy level of collected data. A specified information adding means 1e adds specified information for specifying the security processing to data. A transmission means 1f transmits data, to which security processing is performed, through a network 4 to a receiver 5. A reception means 5a of the receiver 5 receives data from the transmitter 1. A specified information extracting means 5b extracts the specified information added to the data. While referring to the specified information, a security processing releasing means 5c releases security processing applied to the data.