Identity request and Identity response

15:11:12.122 [NAS] DL 0001 EMM: Identity request
        Protocol discriminator = 0x7 (EPS Mobility Management)
        Security header = 0x0 (Plain NAS message, not security protected)
        Message type = 0x55 (Identity request)
        Identity request message identity = 1 (IMSI)
15:11:12.123 [RRC] DL 0001 00 DCCH: DL Information Transfer
        {
          message c1: dlInformationTransfer: {
            rrc-TransactionIdentifier 0,
            criticalExtensions c1: dlInformationTransfer-r8: {
              dedicatedInfoType dedicatedInfoNAS: '075501'H
            }
          }
        }

15:11:12.142 [RRC] UL 0001 00 DCCH: UL Information Transfer
        {
          message c1: ulInformationTransfer: {
            criticalExtensions c1: ulInformationTransfer-r8: {
              dedicatedInfoType dedicatedInfoNAS: '174D1646C10A0756084906110000000010'H
            }
          }
        }

15:11:12.142 [NAS] UL 0001 EMM: Identity response
        Protocol discriminator = 0x7 (EPS Mobility Management)
        Security header = 0x1 (Integrity protected)
        Auth code = 0x4d1646c1
        Sequence number = 0x0a
        Protocol discriminator = 0x7 (EPS Mobility Management)
        Security header = 0x0 (Plain NAS message, not security protected)
        Message type = 0x56 (Identity response)
        Mobile identity:
          IMSI = 460110000000001