Abstract: Aiming at the defects of high energy consumption, large amount of calculation, and low efficiency for traditional identity authentication technology, this paper proposes an IoT(Internet of Things) terminal authentication scheme based on NFC(Near Field Communication)and OTP(One-Time Password). This scheme has the advantages of low cost and simple implementation of one-time password, and applies to terminals with partial storage and weak computing capabilities in the Internet of Things environment. At the same time, both parties of communication use NFC technology to interact, and NFC technology is used to perform conflict detection during device initialization and effectively solve the security problem of plaintext transmission of one-time passwords. Through the analysis of its performance, it can be known that the program can effectively prevent common attacks while ensuring a smaller amount of calculation and higher efficiency, which can be applied to the Internet of Things environment.

Key words:  IoT, identity authentication, NFC, OTP