AMF as a core network component in 5G, is responsible for managing 5G terminal equipment (UE) access and mobility management and interacting with other network functional units (e.g., UPFs, SMFs, and AUSFs); during this time, multiple secure encryption and key interaction processes are performed, and its security number is abbreviated as ASN.
I. Definition and Function In 5G(NR) mobile communication system ASN (Access and Mobility Management Function Security Number) is the security number of AMF (Access and Mobility Management Function).The AMF security number-ASN is an important part of the security architecture of 5G(NR) network. Especially, it plays a crucial role in 5G core (5GC) network; its specific applications and characteristics are as follows;
The AMF security number is a unique identifier assigned to the access and mobility management functions; it plays a crucial role in protecting the communication between the user (UE) and the 5G (NR) network, due to the fact that the AMF is specifically responsible for access management, mobility management, and security in 5G networks.
The ASN is used as a security parameter used in the authentication and key negotiation process between the terminal (UE) and the AMF. These procedures are essential for establishing secure connections and ensuring the confidentiality and integrity of communications between the terminal (UE) and the 5G (NR) network.
II.ASN application during the initial establishment of the connection the terminal (UE) and the AMF authenticate each other; the ASNs are involved in this process to verify each other's identities in order to contribute to the generation and exchange of security keys; and these keys will be used to encrypt and decrypt the data exchanged between the terminal (UE) and the network.
III.ASN Characteristics AMF Security Numbering is used to enhance the overall security posture of a 5G network by providing a unique identifier for each AMF. This ensures that authentication and key negotiation procedures are performed securely, preventing unauthorized access and protecting user data.
ASN in 5G (NR) is a key security parameter associated with access and mobility management functions. It helps to ensure communication between user devices and the 5G core network, contributing to strong and secure connectivity in 5G deployments.
