关键词: 物联网, 多路传输, 安全通信, DiffieHellman算法, 密钥协商

Abstract: Due to the unique characteristics in IoT, such as heterogeneous and processing capacity limited terminals, complex information transmission process and diverse applications, communication security is much more complicated compared with the Internet. Moreover, the existing singlepath transportation security methods can not ensure safety and reduce computation complexity at the same time, which makes these methods not suitable for the IoT. In view of the above issues, this thesis proposes an endtoend secure communication method for the IoT, combining encryption and authentication technology with multipath transportation. The basic idea was as follow: both terminals carried on key agreement scheme based on the DiffieHellman algorithm. Then, the sender used the session key obtained in the above stage and the symmetric encryption algorithm to encrypt data and split the encrypted data into segments, which were then sent to the receiver through multiple independent paths. Theoretical analysis shows that this method can be better against security threats such as maninthemiddle attack, key crack, with reduced computing complexity to a certain extent compared with the singlepath transportation secure method.

Key words: Internet of Things, multipath transportation, secure communication, DiffieHellman algorithm, key agreement