def _set_confidentiality_offset(self, v, load=False):
    """
    Setter method for confidentiality_offset, mapped from YANG variable /macsec/mka/policies/policy/state/confidentiality_offset (macsec-types:confidentiality-offset)
    If this variable is read-only (config: false) in the
    source YANG file, then _set_confidentiality_offset is considered as a private
    method. Backends looking to populate this variable should
    do so via calling thisObj._set_confidentiality_offset() directly.

    YANG Description: The confidentiality offset specifies a number of octets in an Ethernet