Sony Corporation

Sony Electronics Inc

Ryuji Ishiguro

Tomoyuki Asano

Yoshitomo Osawa

Yuichi Ezura

Makoto Sato

Hisato Shima

Itaru Kawakami

Yoshio Osakabe

Tateo Oishi

Teruyoshi Komuro

Mitsuru Tanabe

Munetake Ebihara

Atsushi Mitsuzawa

Ichiro Sato

Motohiko Nagano

Keiko Tada

Takumi Okaue

Koichi Tanaka

Makoto Yamada

Ryuta Taki

Yoji Kawamoto

Motomasa Futagami

Takehiko Nakano

Eric J Swenson

Pierre Chavanne

Masafumi Minami

Yoshimichi Kitaya

Hirokazu Kawahara

Yoshisuke Kuroda

Teppei Yokota

Nobuyuki Kihara

Toshihiro Ishizaka

Norifumi Goto

Tateo Ooishi

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

A cipher key is generated by first information shared in secrete between a data transmitting unitand a data receiving unit, second information derived from duplication control information of transmit data and third information which is time change information shared between the data transmitting unit and the data receiving unit to cipher data by a CPUby using the above-mentioned cipher key to transmit, from the data transmitting unitto the data receiving unit, transmit data in which the duplication control information and the time change information are added to the ciphered data.

Data transmission system

To provide a copyright protection storage medium in which copyright protected contents are recorded by an information recording apparatus connected to a content server providing copyright protected contents and a license server handling licenses concerning recording/playback of the copyright protected contents through a network, in which the copyright protected contents are written by a simple copy-and-paste when the information recording apparatus is possessed by a prescribed user, and the copyright protected contents are written by combining a domain model which assures playback in the apparatus and a media-bind model when the information recording apparatus is possessed by another user.

Copyright protection storage medium, information recording apparatus and information recording method, and information playback apparatus and information playback method

A personal library on a network enables content to be distributed in a manner that is able to be regulated to prevent users from violating copyright law yet allows user to use the content on more than one device. The personal library receives content from a store and/or contains content and then provides the content including a content management implementation to user devices.

Personal library on net

Methods and systems for controlling the distribution of digital content are provided. A license holder acquires protected content and an original digital license to the protected content from a content provider system. The license holder in turn delegates all or part of the grants in that original license to other qualified devices or clients. The content remains in its original, protected or encrypted form while it is delivered from the license holder to the client along with a digital sublicense that the client receives from the original license holder, whereupon the content can then be rendered. The original digital license defines or governs the conditions under which such delegation occurs, and includes terms under which such delegation is permitted to continue in order to enforce the intent of the content provider.

Article of manufacture for controlling the use of content by providing for the delegation of rendering rights

The present invention is directed to a streaming system for encrypting compression-encoded image data to distribute it via network of a predetermined transport protocol, and a streaming server used in this system transmits, to a client terminal, on the RTP packet basis, stream data encrypted so that encryption is performed every encryption block size from the leading portion of each GOP without encrypting the last data having less than encryption block size. In this instance, portions of prior and/or posterior stream data are stored into an extended area of RTP header so that size of stream data transmitted every RTP packet is integral multiple of encryption block size. Further, size information of added prior additional data and/or posterior additional data are also stored into the extended area. This streaming server suppresses increase in size by encryption to have ability to support both real time production and down-load reproduction without replacement of encryption.

Streaming system for distributing encrypted compressed image data, and streaming method therefor

The present invention relates to an information processing apparatus, an information processing method, a recording medium, and a program for importing and exporting a content with information missing controlled. A CPU extracts a sound track contained in the content in step S, and converts a format of the extracted sound track into a format compatible with a memory stick in step S. The CPU generates a predetermined file from data contained in the content and excluding the sound track in step S. In step S, the CPU attaches reference information of the sound track to the file. In step S, the CPU controls the writing of the sound track in the converted format and the file to the memory stick. The present invention is applied to clients of a DRM system.

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

A system is provided for preventing recorded data from being illicitly read out and analyzed. An Internet connection interface transmits a program executed by an adapter to an authentication station, while receiving the program in an encrypted form from the authentication station. A hard disc records the encrypted program, received from the authentication station. An interface transmits the program recorded on the horizontal direction on the adapter.

Information processing system

An information processing system and method using an encryption key block sets sub-trees classified based on data processing ability of the devices (capability) in a key tree in which respective keys are corresponded to a root, nodes and leaves of a tree in which a plurality of devices are constituted as the leaves, generates a sub-enabling key block which is effective for an entity in a managing subject of each sub-tree (entity), and generates an enabling key block decodable only by the entities having common capability. Also, an information processing system and method using an encryption key block manages a partial tree of a key tree (sub-tree), generates a sub-enabling key block based only on a key set corresponding to nodes or leaves included in the sub-tree, and generates an enabling key block decodable only by selected entities by using the sub-enabling key block. Thus, it is possible to generate and distribute an enabling key block corresponding to data processing ability of a device and to manage devices by dividing a hierarchical key tree structure.

Information processing system and method using encryption key block

Growing community of inventors

Tokyo, Japan

Ryuji Ishiguro