Patent ID: 11888894
Assignee: ORACLE INTERNATIONAL CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. A method for mitigating network function (NF) update and deregister attacks, the method comprising:
at an NF repository function (NRF) implemented by at least one processor:
receiving, from an NF, an NFRegister request including a hash of a first authentication string, an NF instance identifier, and an NF profile;
storing the hash of the first authentication string;
registering the NF by storing the NF profile in an NF profile database;
receiving a first NFDeregister request including the NF instance identifier; and
using the stored hash of the first authentication string to validate or reject the first NFDeregister request, wherein receiving the first NFDeregister request includes receiving the first NFDeregister request including an authentication string that is different from the first authentication string and wherein using the stored hash of the first authentication string to validate or reject the first NFDeregister request includes computing a hash of the authentication string from the first NFDeregister request, comparing the hash of the authentication string from the first NFDeregister request to the stored hash of the first authentication string, determining that the hash of the authentication string from the first NFDeregister request does not match the stored hash of the first authentication string, and, in response, rejecting the first NFDeregister request.