code: @Deprecated
      public void AddProtected(HeaderKeys label, byte[] value) throws CoseException {
          addAttribute(label, value, PROTECTED);
      }
docs: Set an attribute in the protect bucket of the COSE object
  
  @param label CBOR object which identifies the attribute in the map
  @param value byte array of value
  
  @deprecated As of COSE 0.9.0, use addAttribute(HeaderKeys, byte[], Attribute.PROTECTED);
  @exception CoseException COSE Package exception