부산대학교 도서관

The secure transmission of data in IoTs enable communicating device is facing a challenging task due to the open wireless channel. The open wireless channel communication devices cannot occupy the network interface process, so always compromised with security threats. This paper proposed a secret key generation algorithm based on the discrete wavelet packet transform. The discrete wavelet packet transform performs here two tasks preprocessing and quantization. The function of the algorithm reduces some steps of conventional secret key generation methods. The conventional key generation methods applied the five steps for the process of key generation. The proposed algorithm derives the characteristic of channel reciprocity of signals such as RSSI. The characteristic of channel estimate in terms of energy and entropy in from of quantization and bit represents. The proposed algorithm encapsulates with IEEE802.11 wireless protocol to exchange information applied public-key cryptography algorithm such as a cyclic key. The approach of cyclic key increases the value of the randomness factor; the increased value of randomness reduces the possibility of security threats. The algorithm's overall process reduces the computational overhead of the secrete key generation process for IoTs enable devices.