Research on data encryption techniques for distributed interactive simulation network

Along with the extension of DIS network application, information security issue has become more and more important. In this paper, we first analyzed the characteristics of data and security problems in DIS network. For the real-time interactive data in DIS network, a stream cipher algorithm based on Logistic chaotic map (Logistic-EA) was presented. In this algorithm, the key stream was generated by Logistic chaotic map. The ciphertext was gotten by executing XOR operation of plaintext and key stream. Logistic-EA has high security level and high encryption speed. For the non-real-time data, a hybrid encryption algorithm based on the chaos theory and AES (Chaos-AES) was presented. In this algorithm, the initial key and round key were generated by logistic chaotic map. Chaos-AES increased key space and implemented one-time pad. So that the ciphertext encrypted by this algorithm is harder to break. The experiment results indicate that the algorithms above are effective in the DIS network.