Sony Corporation

Matsushita Electric Industrial Co., Ltd.

Yoshio Osakabe

Makoto Sato

Hisato Shima

Tomoyuki Asano

Yoshitomo Osawa

Ryuji Ishiguro

Hiroshi Yamazaki

Noriko Kotabe

Shigeo Tanaka

Yasuo Kusagaya

Akira Katsuyama

Kouichi Sugiyama

Takehiko Nakano

Gen Ichimura

Yumiko Ohnuki

Yasushi Takahashi

Koichi Sugiyama

Yoshiyuki Takaku

Koji Iwamoto

Shigeru Maki

Yoko Souma

Toshihiro Imaura

Tadao Suzuki

Harumi Kawamura

Takaaki Yamada

Koichi Ishizaka

Hisafumi Yamada

Yukio Tsuda

Takao Itabashi

Yasuyuki Yamamoto

Masayuki Miyagawa

Kouich Sugiyama

Sumio Satoh

The invention provides an enciphering apparatus and method, a deciphering apparatus and method and an information processing apparatus and method by which illegal copying can be prevented with certainty. Data enciphered by a 1394 interface of a DVD player is transmitted to a personal computer and a magneto-optical disk apparatus through a 1394 bus. In the magneto-optical disk apparatus with which a change to a function is open to a user, the received data is deciphered by a 1394 interface. In contrast, in the personal computer with which a change to a function is open to a user, the enciphered data is deciphered using a time variable key by a 1394 interface, and a result of the decipherment is further deciphered using a session key by an application section.

Enciphering apparatus and method, deciphering apparatus and method as well as information processing apparatus and method

In order to satisfactorily transmit audio data of various formats through a transmission line, when data having a predetermined data length as a unit is transmitted by a predetermined format between devices connected to a predetermined transmission line, label data indicating a system of transmitted audio data is located at a starting portion of the data having the predetermined data length, sub-label data is located at an interval behind label data if necessary and data accompanying with audio data is located and transmitted, whereby a side which receives this data can easily identify a system of audio data or the like.

Transmission method, transmission apparatus and transmission system

The invention provides an enciphering apparatus and method, a deciphering apparatus and method and an information processing apparatus and method by which illegal copying can be prevented with certainty. Data enciphered by a 1394 interface of a DVD player is transmitted to a personal computer and a magneto-optical disk apparatus through a 1394 bus. In the magneto-optical disk apparatus with which a change to a function is not open to a user, the received data is deciphered by a 1394 interface. In contrast, in the personal computer with which a change to a function is open to a user, the enciphered data is deciphered using a time variable key by a 1394 interface, and a result of the decipherment is further deciphered using a session key by an application section.

Utilizing a key for enciphering and deciphering that is modified during enciphering and deciphering

The present invention makes it possible to readily judge details of data transmitted through a bus line, such as channel structure, at a receiver's end. When data is transmitted in a predetermined format with units having a predetermined data length among devices linked to a bus line, the data is transmitted by setting up a section for transmitting auxiliary data of transmission data in a unit having the predetermined data length, and placing identification data related to spatial placement of the transmission data in a first section within the section for transmitting the auxiliary data, and data related to set-up of the transmission data in a second section within the transmitting section.

Transmitting method and apparatus

An information processing apparatus and an information processing method capable of preventing information from being copied illegally. where a hash function and a service key are stored in advance in an EEPROM of a DVD player serving as a source. In an BEPROM of a personal computer (PC) serving as a sink, on the other hand, its ID and a license key are stored beforehand. The DVD player requests the PC to transmit the ID. The DVD player then applies the hash function to data resulting from concatenation of the lID with the service key to generate a license key (=hash (ID &#x2225;service_key)). Subsequently, the DVD player generates a source side common session key and encrypts the session key by using the generated license key. Then, the DVD player transmits the encrypted source side common session key to the PC. The PC decrypts the encrypted source side common session key by using the license key stored in its EEPROM to produce a sink side common session key which has a value equal to that of the source side common session key.

Information processing apparatus, information processing method, information processing system and recording medium

Transmission method, transmission device, and transmission system

An information processing apparatus and an information processing method are capable of preventing information from being copied illegally. To put it in detail, a hash function and a service key are stored in advance in an EEPROM of a DVD player serving as a source. In an EEPROM of a personal computer (PC) serving as a sink, on the other hand, its ID and a license key are stored beforehand. The DVD player requests the PC to transmit the ID. The DVD player then applies the hash function to data resulting from concatenation of the ID with the service key to generate a license key (=hash (ID&#x2225;service_key)). Subsequently, the DVD player generates a source side common session key and encrypts the session key by using the generated license key. Then, the DVD player transmits the encrypted source side common session key to the PC. The PC decrypts the encrypted source side common session key by using the license key stored in its EEPROM to produce a sink side common session key which has a value equal to that of the source side common session key.

A data transmission system in which a function block is housed in a subunit in a unit to enable communication among the unit, subunit and the function block. To this end, the data transmission system includes a digital STB , a DTV , and an audio amplifier . Within the DTV is housed a video monitor subunit within which are housed a decoder function block and a feature function block . Within the audio amplifier is housed an audio sub-unit within which a decoder function block and a feature function block , that can be endowed with functions in common with the decoder function block and the feature function block , respectively, and a processing function block , are housed.

Data transmission control apparatus and data transmission method

Growing community of inventors

Kanagawa, Japan

Yoshio Osakabe