Research On Authentication And Key Agreement Based On Multi Group

With the rapidly development of technology of mobile communication,business type becomes more and more rich,the mobile services range from voice,data to mobile shopping,car,ticket etc,the traditional cellular network system has being faced unprecedented challenges,such as,bad congestion of network.Also,large amounts of prvacy-sensive data transmiss in wireless channels,which greatly restricts the development of communication technology in the future.Therefore,group communication and terminals are allowed to communicate directly with each other has become a new research focus recently in the field of wireless communications.D2 D communication brings a lot of benefits as well as promising prospects such as offloading of base station in cellular networks,expansion of communication range,increasement of transmission rate,etc.It is challenging and important to protect the security of data and user's privacy in communication.Thus,this thesis focus on network congestion and security during communication,consider the features of MTC and D2 D devices,based on encryption technology,we proposed the schemes that contain valid security authentication and key agreement.The main contributions work are as follows:(1)Firstly,we analyzed the characteristic of several group-based authentication and key agreement in 4G group communication and summarized the advantages and disadvantages of group-based communication comparing with the traditional cellular communication in large scale MTC devices access to the core network simultaneously.At the same time,cryptography,mathematical theory and certificateless authentication mechanism.Following the features of D2 D communication,security threats and security requirement were illustrated,which laid the foundation for the later theoretical research.(2)Then,we researched the multi group-based and device side key distribution secure authentication and key agreement.There are several problems in the existing methods with limited devices being handled during 4G group-based authentication and lack of security.For these defects,we studied the strategy based on multi group-based and device side key distribution secure authentication and key agreement,combine aggregate signature technology,realize authentication message aggregation,data confidentity and integrity.Besides,we also considered deliberately,attack node damage behavior existing the 4G communication system.Theoretical analysis and simulation results show that,the proposed strategy can effective reduce the consumption of bandwidth,alleviate the congestion of the core network,the security of constituting 4G link.(3)Finally,we researched the secure group-based authentication based on ECC certificateless in D2 D communication.The existing methods of secure group communication do not fully consider the large scale D2 D devices group communication and the processing ability of user devices.Thus,we analyzed D2D-based secure group communication underlying cellular networks.It can adaptively work as one of two technolygy cetificateless authentication and elliptic curve cryption.In order to avoid the dynamic join or leave of D2 D user,D2 D group need to carry out re-key generation.Our study has important theoretical significance and practical value on solving the problem of increasing network congestion and ensuring secure authentication and key agreement.