The Lightweight Group Key Management Protocol For Body Area Network

As Body Area Network collects and transmits health data which is sensitive and private information, allowing only authorized entities to access. Therefore, with research and development of BAN, the security of BAN should be priority. Group communication makes sure that message is transmitted efficiently in the network, which improves network resource utilization, and it is an important means of communication. Secure group communication needs the support of the group key management techniques. A management mechanism for the group key is proposed for BAN in this thesis.This paper firstly introduces body area network and its security issues. Then describes several existing sensor network group key management scheme and analysis them. In order to decreasing the computing, storage, and communication overhead, this paper presents a hierarchy group key management scheme based on the logic key tree. Before group communication, the control unit needs the authentication to a member which joins in to the group communication and negotiates a secret session key. The paper firstly describes the authentication mechanism based on biometric encryption technology for the body area network. In the mechanism, biological encryption technology is used for the user to complete authentication. While generating the shared encryption key between the sink node and sensor nodes, to prepare for group communication protocol to communicate securely.Based on the real topology of BAN, the hierarchy architecture is used to divide users into small subgroups and the system into two layers. The key update is more light-weighted due to the cooperation between the group unique management and subgroup management. The analysis of security protocols and performance comparison demonstrate that the group can be maintained by utilizing the multicast key management protocol with less computation, less communication and less storage.