AdddmInitn
                Mandatory
                Hdr
                Mandatory
                Body
                Optional
                Envt
                Mandatory
                Cntxt
                Optional
                Tx
                Mandatory
                AdddmData
                Mandatory
                PrtctdData
                Repetition (0..n)
                CnttTp
                Mandatory
                EnvlpdData
                Optional
                Vrsn
                Optional
                Rcpt
                Repetition (1..n)
                NcrptdCntt
                Optional
                CnttTp
                Mandatory
                Content Encryption Algorithm
CnttNcrptnAlgo
                Mandatory
                Definition: Algorithm used to encrypt the data.
Type: AlgorithmIdentification25
Algo
                Mandatory
                Param
                Optional
                NcrptdDataElmt
                Repetition (1..n)
                NcrptdData
                Optional
                SplmtryData
                Repetition (0..n)
                SctyTrlr
                Optional