Seiko Epson Corporation

Tamakazu Kitamura

Takashi Takehana

Hisakazu Koyama

Naohiko Koakutsu

Toshihiro Tsukada

A processing device is provided. A first storage unit stores a correspondence table which is indicative of a correspondence relationship between attributes of data and encryption levels for encrypting data. An obtaining unit obtains data. A first determination unit determines an encryption level according to an attribute of the data obtained by the obtaining unit, using the correspondence table stored in the first storage unit. An encryption unit encrypts the data obtained by the obtaining unit in the encryption level determined by the first determination unit. A second storage unit stores the data encrypted by the encryption unit.

Encryption processing device, encryption processing system and control method for encryption processing device

A data processing device with maintenance counters reliably stores the maintenance counter values. A data processing device such as a printer has RAM for storing the maintenance counter values, EEPROM segmented into a nonvolatile maintenance counter area and a temporary maintenance counter storage area, and a CPU for updating the maintenance counter values in RAM based on detection of a state change in the printer. The CPU writes the maintenance counter values accumulated in RAM at a predetermined time to the temporary maintenance counter storage area, and at a predetermined time writes the maintenance counter values from the temporary maintenance counter storage area to the nonvolatile maintenance counter area.

Data processing device having a maintenance counter function

A data processing apparatus and a control method for a data processing apparatus can start up by running a normal boot program the next time the power turns on in the event the power turns off while rewriting the boot program to flash ROM by temporarily providing a plurality of boot sectors instead of always maintaining a plurality of boot sectors in flash ROM. During the memory writing mode the flash ROMis segmented into a boot selector sector, main sector, first boot sector, and a second boot sectorthat is temporarily reserved by overwriting a part of the main sectorin the memory writing mode.

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Nagano, Japan

Tamakazu Kitamura