The Application Of Software-defined Networking In Hospital And Its Safety Research

Objective: Traditional hospital network adopts the separation mode of internal and external networks to protect hospital information security.However,with the advancement of medical information,the internal and external network interconnection of hospitals has become a trend.How to make use of the new technology and algorithm to strengthen the data protection and save the network resources when opening internal and external networks is the problem faced by the hospital network update.Method: The Software-defined networking(SDN)is applied to hospital,and the virtual tenant network(VTN)is created by combining network virtualization.The network equipment is modified and configured by using graphical user interface(GUI)through Open Flow protocol.Aiming at the risk of distributed denial of service(DDo S)attacks,based on the characteristics of centralized control of the controller,we count the characteristics of the destination IP address of the incoming packets,calculate the entropy value and compare it with the threshold value by using the detection algorithm based on information entropy,so as to determine whether the SDN has been attacked or not.Then,based on the attack detection,we propose a SDN node hazard assessment method based on Beta distribution-Beta RA,which can calculate the risk coefficient of the nodes through the Beta distribution,and make a reasonable risk assessment for the host nodes in the topology.Results: The virtual network of each department is relatively independent,and outsiders could not access the data information of the department,which strengthens the security of hospital network,making the network more flexible and centralized control.Our algorithm can successfully detect DDo S attacks and make a reasonable risk assessment for unknown nodes.Nodes with higher levels of risk are more vulnerable to attack in the future,which is equivalent to predicting their future.Conclusion: The application of hospital network of SDN satisfies the hospital network construction principles,guarantees the hospital's data security,adapts to new business development,and makes the hospital network more flexible and centralized control while focusing on protecting data security.Our algorithm improves the security of the hospital network using SDN by detecting and predicting DDo S attacks.