Communication security method and apparatus of first node and second node communicating based on full duplex communication scheme using near field

摘要

A communication security method and apparatus of a first node and a second node are provided. The first node and the second node communicate with each other based on a full duplex communication scheme using a near field. In the communication security method and apparatus, information to be transmitted may be encrypted based on received information and the encrypted information may be transmitted, in a TX node and an RX node. The communication security method and apparatus prevent an additional node from decrypting the information, and ensure transmission and reception of reliable data. In addition, the communication security method and apparatus prevent information from being decrypted in a physical layer, by periodically or aperiodically exchanging a new encryption key.

主权项

1. A communication security method of a first node, the communication security method comprising:
receiving items of first information from a second node at previous times, the previous times known by the first node and the second node; selecting one of the items of first information based upon information of one of the known previous times; encrypting second information, wherein the second information differs from the first information, using the selected item of first information; and transmitting the encrypted second information to the second node at a next time, wherein the previous times are repeated periodically in advance by a setting between the first node and the second node, or aperiodically determined by an indicator indicating the known previous times.