| 摘要 |
An information providing method, comprises receiving a receiver identifier and an encrypted transmitter identifier from a receiver receiving the encrypted transmitter identifier from a transmitter by a relay equipment, decrypting the encrypted transmitter identifier by the relay equipment, determining an information providing equipment providing transmitter information with respect to the transmitter based on a decryption result of the encrypted transmitter identifier by the relay equipment, requesting the transmitter information from the information providing equipment by the relay equipment, receiving the transmitter information from the information providing equipment by the relay equipment, and transmitting the transmitter information to the receiver by the relay equipment.
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