An information recording method for recording content information in a
recording medium having at least re-readable area, comprising converting,
based on a first conversion rule .phi.1, first information including a
first component for obtaining content control information, converting,
based on a second conversion rule .phi.2, second information including a
second component for obtaining the first information, and writing the
converted first information and the converted second information into the
re-recordable area of the recording medium.