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Is there any scenario where the Tracking area update request sent be the ue will not be integrity protected?

+2 votes
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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 .?

posted Aug 26, 2016 by Lavanya L

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