def __init__(self, encryption_algorithm, protocol):
_validate_not_none('<STR_LIT>', encryption_algorithm)<EOL>_validate_not_none('<STR_LIT>', protocol)<EOL>self.encryption_algorithm = str(encryption_algorithm)<EOL>self.protocol = protocol<EOL>
:param _EncryptionAlgorithm encryption_algorithm:
    The algorithm used for encrypting the message contents.
:param str protocol:
    The protocol version used for encryption.