Privacy Enhancement Method for Mobile Communication Sessions Based on Physical Layer Security

Abstract

The invention relates to a method for enhancing the privacy of a mobile communication session based on physical layer security, comprising the following steps: a terminal sends an initial access request, a base station allocates a dedicated key negotiation channel for the terminal; the base station and the terminal respectively extract channel characteristics of the channel, And use the channel characteristics to generate a consistent key; the base station allocates a dedicated service channel for the terminal, and releases the dedicated key negotiation channel; the terminal and the base station use the generated key to encrypt the communication session on the dedicated service channel; regularly measure and extract The channel characteristics of the dedicated traffic channel, and use the channel characteristics to update the key. By adopting the above method, the present invention binds encryption and wireless channels at the signal level, establishes a physically isolated secure communication channel from the beginning of communication, and prevents the leakage of sensitive information such as user identification in existing mobile communication, thus effectively solving the problem of mobile communication. The problem of insecure transmission of sensitive information in the process.

Description

technical field [0001] The invention relates to a method for enhancing the privacy of mobile communication sessions based on physical layer security. Background technique [0002] In the general mobile communication system, the encryption mechanism is used to ensure the security of user communication. However, the premise of the encryption mechanism is that the network obtains the corresponding encryption key according to the received user identity information, which makes the process from terminal access to authentication negotiation Encryption protections cannot be enabled during this process. Taking the LTE system signaling process as an example, the basic signaling interaction process between UE, eNodeB and MME is as follows: figure 1 shown. from figure 1 It can be concluded that during the process from the UE requesting access to the authentication negotiation, the terminal needs to submit sensitive information such as the identity IMSI to the network to complete the...

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Problems solved by technology

from figure 1 It can be concluded that during the process from the UE requesting access to the authentication negotiation, the terminal needs to submit sensitive information such as the identity IMSI to the network to complete the authentication process, which leads to the risk of leaking sensitive information such as the user identity in the system

Authentication and key agreement (AKA) in the process of UE accessing the network is the basis of LTE system security, but the sensitive information exposed before the key agreement is still not well resolved, so the clear text transmission of user identity information is easy to leak Therefore, it is urgent to study the corresponding encryption mechanism and formulate corresponding security measures.

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