关键词: 混沌序列, 密匙序列, 节点调度, 医院无纸化办公, 改进背包算法, 网络自适应加密

Abstract:

Affected by the stability of the hospital network, the data of paperless office network data is vulnerable to attack. Therefore, an adaptive encryption algorithm based on chaotic sequence is proposed. The key is automatically generated by random numbers, and the chaotic sequence is generated by three-dimensional chaotic system to generate the scrambled and grouped key sequence. Based on the service expectation, a node scheduling algorithm is designed to schedule the nodes of hospital paperless office network to ensure that the key encryption can be scheduled to the appropriate network nodes. Through cloud storage and improved knapsack algorithm, the adaptive encryption of hospital paperless office network is realized. In the paperless office network of a hospital, text data, image data and video data are selected for testing. The test result shows that the encrypted ciphertext presents a digital state, which is not easy to attract the attention of attackers. The mean square error between the ciphertext and plaintext of the three kinds of data is large, up to 258. 63. The data correlation of the three kinds of data after encryption is greatly weakened, which shows that the design algorithm can destroy the original correlation of the data and has good network data encryption ability.

Key words: chaotic sequence, key sequence, node scheduling, hospital paperless office, improved knapsack algorithm, network adaptive encryption