This read-create INTEGER (noAuthNoPriv(1)/authNoPriv(2)/authPriv(3)), defaulting to noAuthNoPriv, specifies, per its source description, the SNMPv3 security level applied to this notification host's messages: no authentication or encryption, authentication only, or both authentication and encryption. Admins raise this to authPriv when notifications must be both verified as authentic and encrypted in transit to the management station, typically over untrusted network paths. For example, setting this to authPriv(3) for a notification host reached over the internet would ensure the trap/inform content is encrypted and its authenticity verified.