Information interaction method and device

Abstract

The invention discloses an information interaction method and device. The method comprises the steps that terminal equipment transmits attachment request information to core network equipment and receives attachment acceptance information of the core network equipment, and the attachment acceptance information comprises a first integrity check code; The terminal device obtains a second integrity check code based on the attachment acceptance information; And if the first integrity check code is the same as the second integrity check code, the terminal device obtains a third integrity check codebased on the encrypted attachment completion information, and transmits the encrypted attachment completion information added with the third integrity check code to the core network device. Accordingto the scheme disclosed by the embodiment of the invention; Only the attachment request information, the attachment receiving information and the attachment completion information need to be transmitted between the terminal equipment and the core network equipment, so that the data interaction process is reduced, the data size of the interaction information is reduced, the time consumption of theinformation interaction process between the terminal equipment and the core network equipment is reduced, and the power consumption cost of the terminal equipment can be reduced.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to an information interaction method and device. Background technique [0002] At present, some communication systems are provided with terminal equipment and core network equipment, and information exchange can usually be performed between the terminal equipment and the core network equipment. For example, a terminal device can transmit information to a radio access network device, and then the radio access network device transmits the information to a core network device, so as to realize information interaction between the terminal device and the core network device. [0003] In addition, in order to ensure the security of the communication system, when information is exchanged between the terminal device and the core network device, it is necessary to authenticate the identity of the other party and perform data protection on the exchanged information. In...

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Problems solved by technology

[0004] However, the inventor found in the research process of this application that although the existing technology can guarantee the security of the communication system, the identity authentication can be completed only after multiple information exchanges between the terminal equipment and the core network equipment, and the information used for data protection can be determined. Integrity algorithm and encryption and decryption algorithm, the number of information interactions is large, and the amount of information data exchanged is large, resulting in the problems of long time-consuming information interaction process and high power consumption of terminal equipment in the existing technology

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