Certificateless group security authentication method in D2D communication

Abstract

The invention discloses a certificateless group security authentication method in D2D communication. A KGC generates corresponding partial private keys and public keys; then, it is the discovery of UE; a sent message is signed in combination with ECDSA signature formed by ECC and DSA; according to a key graph rule, corresponding D2D equipment forms groups; then, according to LKH, the groups are divided into sub-groups; furthermore, secret keys are generated for each sub-group; simultaneously, each sub-group needs to calculate own secret key; when the processes are completed, security group communication can be carried out; but, because of the dynamic nature of the D2D equipment, dynamic joining and leaving of the D2D equipment need to be correspondingly processed; if the D2D equipment joins dynamically, the secret keys of the groups need to be updated; new joined equipment cannot decrypt data before; if the D2D equipment leaves dynamically, the D2D equipment cannot decrypt existing data by utilizing the secret keys before; and thus, the whole D2D group communication security and effectiveness are ensured.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a group security authentication method based on no certificate in D2D (Device to Device) communication. Background technique [0002] In recent years, with the strong support of 3GPP, D2D communication has achieved great development. At present, only a small number of D2D devices communicate. With the development of the economy and the continuous improvement of people's needs, the application scenarios and scale of D2D will become larger and larger, and a large number of D2D devices will communicate. At present, with the rapid increase in the number of D2D, the demand for secure links in applications is also more frequent, so ProSe Function / HSS will face more severe challenges, the communication link may be overloaded, how to propose effective D2D communication The plan has become a key issue before people. For 4G networks, 3GPP has standardized the D2D mechanism...

AI Technical Summary

Problems solved by technology

However, because the scheme adopts the IBE-based authentication method, the calculation complexity of the system will be relatively high. For D2D devices, the general processing capacity is limited. If the system complexity is large, the performance of D2D devices will be seriously degraded.

[0004] At the same time, the above methods are not ideal in terms of bandwidth consumption performance and complexity calculation

In summary, the performance of existing D2D group-based communication methods is far from meeting the needs of practical applications when a large number of devices access the core network.

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