Hi friends, I would like to ask a question.
What are the encrypted interfaces in IMS/2G/3G/4G/5G? Which are mandatory and which are optional?
S1MME, GB, IUPS, SGI, GM-C, GM-U… others?
For example, GM interface is encrypted with IPSEC.
Any comments will be welcome, because I am trying to understand all the interfaces that needs to be encrypted/ciphered or integrity protected for security purposes.