5G is now in full deployment with numerous services available across the globe, especially for time-sensitive applications. 5G provides a range of improvements over existing 4G Long-Term Evolution (LTE) mobile networks with regard to capacity, speed and latency. It also provides better security. Nevertheless, security risks still remain and these need to be addressed quickly to ensure that 5G can address all of the target applications that drove original specifications.

One of the concerns is about the many optional O-RAN security specifications that were not being implemented, because they are optional. One would assume there are valid reasons for operators not to implement these measures, for example due to processing cost or complexity. But this is where MACsec could be a potential solution, and it also serves as a complement to other security measures and protocols.

Security Domains with attacker