Research on substation information secure technologies based on chaotic sequence

Along with increasing development of the network involved IEC 61850 standards, information security has become a important problem in the stability of power systems. Taking consideration of possible insecure factors, secure mechanisms for data communications of the IEC 61850 series substation automation system by making research on IEC 62351 is put forward. According to the data and communication security standard IEC 62351 in power systems, authentication is one of the most important security measures. In remote control environment of substation, it is required that the authentication scheme can not only satisfy the authentication demand for substation communication security, but also ensure minimum calculation workload and transport expenses. Using the sensitivity of initial condition of chaotic theory, a new password authentication method based on Logistic chaotic mapping is presented in this paper. The digital chaotic sequence is taken as identity mark sequence. Unlike the general OTP authentication, the chaotic authentication system needn´t to maintain the entire sequence in its storage. The authentication between IEDs in substation automation is taken as an example, and the concrete authentication process between IEDs is designed.