ATMKeyDwnldRspn
                Mandatory
                Hdr
                Mandatory
                PrtctdATMKeyDwnldRspn
                Optional
                ATMKeyDwnldRspn
                Optional
                SctyTrlr
                Optional
                CnttTp
                Mandatory
                AuthntcdData
                Optional
                Vrsn
                Optional
                Rcpt
                Repetition (1..n)
                KeyTrnsprt
                Choice
                KEK
                Choice
                Vrsn
                Optional
                KEKId
                Mandatory
                Key Identification
KeyId
                Mandatory
                Definition: Identification of the cryptographic key.
Type: Max140Text (String)
Restrictions:
- MinLength: 1
- MaxLength: 140
KeyVrsn
                Mandatory
                SeqNb
                Optional
                DerivtnId
                Optional
                KeyNcrptnAlgo
                Mandatory
                NcrptdKey
                Mandatory
                KeyIdr
                Choice
                MACAlgo
                Mandatory
                NcpsltdCntt
                Mandatory
                MAC
                Mandatory
                SgndData
                Optional