Sony Corporation

Sony Electronics Inc

Motomasa Futagami

Motohiko Nagano

Youji Kawamoto

Ryuji Ishiguro

Tatsumi Sakaguchi

Yoji Kawamoto

Masato Horiguchi

Keiko Tada

Hirofumi Kawamura

Hiroshi Ikeda

Mitsuhiro Nakamura

Eric J Swenson

Pierre Chavanne

Ralph D Hill

John P Hwa

Seiichi Adachi

Carl E Quinn

Keiko Saeki

Lakshmana Pamarthy

Atsushi Mituszawa

A streaming system includes an authoring unit, a stream server and a client terminal. The authoring unit generates a file composed of encrypted contents data and the ancillary information at least containing the packetizing control information for generating an RTP packet, a non-encrypted codec dependent header made up of the information pertinent to encoded contents data, and the encryption information for decrypting the encrypted contents data form packet to packet. The streaming server packetizes the encrypted contents data along with at least the codec dependent header and distributes the resulting data as a stream. The client terminal refers to the codec dependent header of the received packet, re-assembles the packet, and decrypts the encrypted contents data of the re-assembled packet to generate contents data.

Streaming system and method

This invention relates to provide a communication network system, a gateway, and a data communication method, in which the gateway has an advanced functionality. A person who issues an access request can retrieve a desired access destination easily by the following configuration: functions of routing information providing and authentication processing are added to a gateway that performs protocol conversion between two different communication networks; when an access request is issued from a public communication network such as Internet to a terminal in a local (private) communication network connected to the gateway, a request terminal is authenticated to enable prevention of unauthorized data writing and reading; and an access request user who succeeded in the authentication is provided with an active terminal list comprising accessible terminal information, or with a user condition table.

Communication network system, gateway, data communication method and program providing medium

A streaming system includes an authoring unit (), a stream server () and a client terminal (). The authoring unit generates a file composed of encrypted contents data and the ancillary information at least containing the packetizing control information for generating an RTP packet, a non-encrypted codec dependent header made up of the information pertinent to encoded contents data, and the encryption information for decrypting the encrypted contents data form packet to packet. The streaming server packetizes the encrypted contents data along with at least the codec dependent header and distributes the resulting data as a stream. The client terminal refers to the codec dependent header of the received packet, re-assembles the packet, and decrypts the encrypted contents data of the re-assembled packet to generate contents data.

Streaming system and streaming method

A management apparatus includes a registering unit configured to issue a first key corresponding to a first service in response to a request for registration with the first service from a first information processing apparatus; a storage unit configured to store an apparatus ID of the first information processing apparatus, the first key, and a second key corresponding to a second service while associating the apparatus ID, the first key, and the second key with each other; and a composite license issuing unit configured to issue a composite license including a first license and a second license, the first license including first encrypted data, which is a content key that is used to decrypt the encrypted content and that is encrypted with the first key, and the second license including second encrypted data, which is the content key that is encrypted with the second key.

Management apparatus, information processing apparatus, management method, and information processing method

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

Information of a terminal equipment used by a user among the pieces of terminal equipment connected to a network is registered in prescribed registering means and a transmission path from the terminal equipment of a transmitter to the terminal equipment of a receiver is determined based on the registered information of the terminal equipment, so that the user can assuredly transmit the information to the terminal equipment of the receiver in the transmission path suitable for the information without any consciousness of the user. The information of the terminal equipment used by a user and the terminal equipment connected to the terminal equipment used by the user among the pieces of terminal equipment connected to the network is registered in prescribed registering means together with information for identifying the user as available environmental information, and provided information is transmitted to the terminal equipment specified by the registered available environmental information.

Communication system, network system, information controller and terminal equipment

Methods and systems of distributing digital content governed by a digital license are provided. In one aspect, the license has identification data for licensed content and is transmitted to a client device. A first item of content is transmitted to the client after receipt by the client of the license. The first item of content has first content identification data, and at least a portion of the first item of content is in encrypted form. A second item of content is transmitted to the client after receipt by the client of the license. The second item of content has second content identification data that is different from the first content identification data. At least a portion of the second item of content is in encrypted form. The encrypted portion of the first item of content is decrypted if the first content identification data corresponds to the identification data for licensed content. Similarly, the encrypted portion of the second item of content is decrypted if the second content identification data corresponds to the identification data for licensed content. The identification data for licensed content remains unchanged after the license is transmitted to the client.

Method and system for providing a content subscription service

The present invention is directed to a streaming system for encrypting encrypted data such as music and image, etc. to perform stream distribution thereof. Client terminals () used in this system structure leaves of the hierarchical tree structure, and hold a key set consisting of a route key, node keys and the own leaf key on a path of this tree structure, whereby SDP file is transmitted from a stream server (). In the SDP file, there is stored encrypted information consisting of EKB including data encrypted by selection key that only specific client terminal holds and encrypted contents key data in which contents key has been encrypted. Only specific client terminal having selection key in key set (selected client terminal) decodes contents key from selection key to decode encrypted contents data caused to undergo stream distribution into contents data to perform real time reproduction thereof.

Streaming system for distributing encrypted data, and streaming method therefor

The present invention relates to an information processing apparatus and method and to a program for reliably preventing unauthorized use of content even in the case of a low-throughput content storage device. A CPU selects content to be stored on a content storage device. In step S, the CPU verifies a first digital signature added to the content. A storage unit stores a usage right. In step S, the CPU searches the storage unit for the usage right. In step S, the CPU verifies a second digital signature added to the usage right. The CPU generates alteration detecting data on the basis of information included in the usage right. In step S, when the content and the usage right are unaltered, the CPU outputs the usage right, the alteration detecting data, and the content to the content storage device. The present invention is applicable to clients in a DRM system.

Growing community of inventors

Kanagawa, Japan

Motomasa Futagami