With the continuous advancement of 5G, the system architecture of the network needs to be highly adaptable to serve new and legal cases while meeting the requirements of users for higher security of communications. This paper proposes a SDN/NFV-based core network slicing for secure mobile communication. This slicing provides a solution to the problem of unencrypted user data with strong connectivity, security and scalability. On the one hand, it is compatible with the existing network architecture and suitable for 5G networks. In addition, it uses symmetric keys corresponding to the user and the network to encrypt user data, which is different from VPN. Moreover, core network slicing based on SDN/NFV is the key to satisfying the complex and diverse scenarios of 5G, with future-oriented scalability and flexibility.
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