A method for management of access history according to the embodiment
includes: storing a write command including write time and a write
address of write access and a write payload in a storage unit of write
access history when the write access occurs; storing a read command
including read time and read address of read access in a storage unit of
read access history when the read access to the target storage unit
occurs; and extracting the read command related to request time included
in a read access acquisition request from the storage unit of read access
history when the read access acquisition request occurs, extracting the
write payload associated with the write time soonest before the request
time and the read address included in the extracted read command from an
appending section of write access history, and outputting read access
information generated from the extracted read command and the extracted
write payload.