LTE RRC: Security Mode Failure

Direction: UE => E-UTRAN
Signalling Radio Bearer: SRB1
RLC Mode: AM
Logical Channel: DCCH
Transport Channel: UL-SCH

The SECURITY MODE FAILURE message is used to indicate an unsuccessful completion of a SECURITY MODE COMMAND. i.e., if the SECURITY MODE COMMAND message fails the integrity protection check, then the UE sends SECURITY MODE FAILURE to the eNodeB

Upon sending this message, the UE shall continue using the configuration used prior to the reception of the SECURITY MODE COMMAND message, i.e. neither applies integrity protection nor ciphering

More details about the security architecture and different kinds of keys are explained here

Reference: 3GPP TS 36.331
Posted by KP
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3 comments:

  1. AnonymousAugust 25, 2014 at 12:13 PM

    Hi,

    Is there any other reason why UE should return Security Mode Failure to the eNB?

    Thanks

    ReplyDelete
  2. AnonymousJuly 12, 2017 at 5:16 AM

    No,there is only one reason i,e intigrity check failure

    ReplyDelete
  3. Hardeep SinghSeptember 16, 2017 at 12:48 AM

    This comment has been removed by the author.

    ReplyDelete

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