Abstract: As the core infrastructure for the efficient and secure utilization of renewable energy sources, the energy internet is the important strategic resource and embodiment of the comprehensive national strength. The security of energy internet has attracted more serious attentions. In this work, first, the structure of internet was analyzed from logical and network topological structure aspects. Second, the existing research methods are classified into three classes, the security demand-driven method, security model-driven method and the system-theoretical method; and the existing researches are analyzed and compared using the Technique for Order Preference by Similarity to Ideal Solution (TOPSIS). Finally, to solve the problem of vulnerability of isolation and lack of integrated solution in existing security mechanism, a new security mechanism based on Trusted Platform Module (TPM) is proposed. The security model and consuming layer protocol are put forward and security analysis is carried out. The results show that the proposed security mechanism can satisfy the security requirements of the energy internet.

Key words: communication, energy internet, trust platform module(TPM), security mechanism, technique for order preference by similarity to ideal solution(TOPSIS), trustworthy computing