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Is there any scenario/network topology when network enables integrity protection for data radio bearers as well ?

+1 vote
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Is there any scenario/network topology when network enables integrity protection for data radio bearers as well ?
posted Sep 13, 2015 by Vikram Singh

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+2 votes

Now and days, various technology options are coming out which can be used to improve LTE throughput as well as LTE capacity. LTE-U/LAA, LWA are well known options. Would operators prefer to have different charging fro different access or the user will be charged same whether it is receiving data through any access (i.e. LTE-U/LAA or LWA) ?

+2 votes

I know that once the security has been established for the NAS signalling connection, the MME will not process any NAS signalling messages unless they have been successfully integrity checked by the NAS. Is there any scenario where the Tracking Area Update Request sent by the ue will not be integrity protected but still it is processed at the mme and a proper response is given to ue .?

+1 vote

I was going through the security specification of 5G network and stopped at a point where it was mentioned that UE shall support integrity protection of user data along with the integrity protection of RRC and NAS-Signalling. Section 5.1.3.1 also mentions that integrity protection of the user data between UE and gNB is optional to use.
I want to know that for which cases/scenarios, it would be needed to enable integrity protection for user data between UE and gNB ?
Enabling both integrity and ciphering for the user data would be an overhead, therefore I started thinking about scenarios/cases.

+2 votes

In LTE, if a NAS packet is going to be sent, the encryption is followed by integrity protection in NAS layer, but in RRC/PDCP layer, When RRC messages are being sent, they are integrity protected first and then encrypted before being sent, unlike NAS messages were. Why the integrity and encryption protection order is different in NAS and AS layer?

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