Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Masanori Mitsuzumi

Takeshi Otsuka

Hideaki Yamashita

Hideaki Kobayashi

A recording medium to be used by being connected to a digital device includes a local bus, a plurality of recording units, an information storage unit, and a communication unit. The local bus has a plurality of switches or bridges. The plurality of recording units are connected to the local bus. The information storage unit stores information indicating a bus configuration of the local bus. The communication unit is used for transferring the information to and from the digital device. After the recording medium is inserted into the digital device, the bus configuration of the local bus is reconstructed based on the information acquired from the communication unit via the information storage unit by the digital device.

Recording medium, adapter, and information processing apparatus

A recording medium includes an encryption/decryption control unit, an authentication control unit, a non-volatile memory, and a volatile memory. The volatile memory stores recorded-position information of data recorded in a data recording area of the non-volatile memory under an unauthenticated condition that an authentication procedure by the authentication control unit has not been performed. The recorded-position information stored in the volatile memory is erased by stopping power supply by detaching the recording medium from the apparatus body, and becomes unavailable in the recording medium even if the power is supplied again to the recording medium so that the data recorded in the data recording area under the unauthenticated condition is not read out.

Recording medium with authentication and encryption/decryption functions

Provided are a recording device, a recording method and a program capable of recording a plurality of types of data files and reproducing, even when data recording is interrupted, data that have been recorded before the interruption. The recording device includes a recording medium control unitfor controlling recording and reproduction of data on a recording mediumincluding a data area in which data rows can be recorded as files and a specific area in which management information for the files can be recorded, and a recording control unitfor time-divisionally recording, through the recording medium control unit, a first data row as a first file and a second data as a second file. The recording control unitreserves an area in the data area and records the first data row in the reserved area in sequence, and when switching from the first data row to the second data row for recording, the recording control unitrewrites the management information corresponding to the end of the first file recorded in the reserved area immediately before the switching such that the first file ends at the end and records the second data row from a location subsequent to the end of the first file in the reserved area.

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Osaka, Japan

Masanori Mitsuzumi