摘要:
Method and apparatus enabled by computer (or equivalent) hardware and software for protection of content such as audio and video to be downloaded or streamed over a computer network such as the Internet. The content is provided to the user via streaming or downloads in encrypted form. The encryption is such that the content key decryption information is transmitted so that it itself is encrypted to be both device and session unique. That is, the key information can be used only to extract the content decryption key for a particular session and for a particular client device such as an audio or video consumer playing device. This prevents any further use or copying of the content other than in that session and for that particular client. The specificity is accomplished by using a device unique identifier and antireplay information which is session specific for encrypting the content key. A typical application is Internet streaming of audio or video to consumers.
摘要:
Some embodiments of the invention provide a content-distribution system. In some embodiments, the content-distribution system distributes device-restricted content and device-unrestricted content. Device-restricted content is content that can only be played on devices that the system associates with the particular user. Device-unrestricted content is content that can be played on any device without any restrictions. However, for at least one operation or service other than playback, device-unrestricted content has to be authenticated before this operation or service can be performed on the content. In some embodiments, the system facilitates this authentication by specifying a verification parameter for a piece of device-unrestricted content. The content-distribution system of some embodiments has a set of servers that supply (1) media storage structures that store content, (2) cryptographic keys that are needed to decrypt device-restricted content, and (3) verification parameters that are needed to verify device-unrestricted content.
摘要:
Some embodiments of the invention provide a content-distribution system for distributing content under a variety of different basis. For instance, in some embodiments, the content-distribution system distributes device-restricted content and device-unrestricted content. Device-restricted content is content that can only be played on devices that the system associates with the particular user. Device-unrestricted content is content that can be played on any device without any restrictions. However, for at least one operation or service other than playback, device-unrestricted content has to be authenticated before this operation or service can be performed on the content. In some embodiments, the system facilitates this authentication by specifying a verification parameter for a piece of device-unrestricted content. The content-distribution system of some embodiments has a set of servers that supply (1) media storage structures that store content, (2) cryptographic keys that are needed to decrypt device-restricted content, and (3) verification parameters that are needed to verify device-unrestricted content. In some embodiments, the device that receives the media storage structure inserts the received cryptographic key or verification parameter in the received media storage structure. In some embodiments, the set of servers also supply cryptographic content keys for the device-unrestricted content. These keys are used to decrypt the content upon arrival, upon first playback, or at some other time. However, some embodiments do not store these cryptographic keys in the media storage structures for the device-unrestricted content.
摘要:
Some embodiments of the invention provide a content-distribution system for distributing content under a variety of different basis. For instance, in some embodiments, the content-distribution system distributes device-restricted content and device-unrestricted content. Device-restricted content is content that can only be played on devices that the system associates with the particular user. Device-unrestricted content is content that can be played on any device without any restrictions. However, for at least one operation or service other than playback, device-unrestricted content has to be authenticated before this operation or service can be performed on the content. In some embodiments, the system facilitates this authentication by specifying a verification parameter for a piece of device-unrestricted content. The content-distribution system of some embodiments has a set of servers that supply (1) media storage structures that store content, (2) cryptographic keys that are needed to decrypt device-restricted content, and (3) verification parameters that are needed to verify device-unrestricted content. In some embodiments, the device that receives the media storage structure inserts the received cryptographic key or verification parameter in the received media storage structure. In some embodiments, the set of servers also supply cryptographic content keys for the device-unrestricted content. These keys are used to decrypt the content upon arrival, upon first playback, or at some other time. However, some embodiments do not store these cryptographic keys in the media storage structures for the device-unrestricted content.
摘要:
Method and apparatus enabled by computer (or equivalent) hardware and software for protection of content such as audio and video to be downloaded or streamed over a computer network such as the Internet. The content is provided to the user via streaming or downloads in encrypted form. The encryption is such that the content key decryption information is transmitted so that it itself is encrypted to be both device and session unique. That is, the key information can be used only to extract the content decryption key for a particular session and for a particular client device such as an audio or video consumer playing device. This prevents any further use or copying of the content other than in that session and for that particular client. The specificity is accomplished by using a device unique identifier and antireplay information which is session specific for encrypting the content key. A typical application is Internet streaming of audio or video to consumers.
摘要:
Some embodiments of the invention provide a content-distribution system. In some embodiments, the content-distribution system distributes device-restricted content and device-unrestricted content. Device-restricted content is content that can only be played on devices that the system associates with the particular user. Device-unrestricted content is content that can be played on any device without any restrictions. However, for at least one operation or service other than playback, device-unrestricted content has to be authenticated before this operation or service can be performed on the content. In some embodiments, the system facilitates this authentication by specifying a verification parameter for a piece of device-unrestricted content. The content-distribution system of some embodiments has a set of servers that supply (1) media storage structures that store content, (2) cryptographic keys that are needed to decrypt device-restricted content, and (3) verification parameters that are needed to verify device-unrestricted content.
摘要:
In the fields of data security and system reliability and qualification, this disclosure is of a method, system and apparatus for verifying or authenticating a device to a host using a zero-knowledge based authentication technique which includes a keyed message authentication code such as an HMAC or keyed cipher function and which operates on secret information shared between the host and the device. This is useful both for security purposes and also to make sure that a device such as a computer peripheral or accessory or component is qualified to be interoperable with the host.
摘要:
Disclosed herein are systems, methods, and non-transitory computer-readable storage media for key space division and sub-key derivation for mixed media digital rights management content and secure digital asset distribution. A system practicing the exemplary method derives a set of family keys from a master key associated with an encrypted media asset using a one-way function, wherein each family key is uniquely associated with a respective client platform type, wherein the master key is received from a server account database, and identifies a client platform type for a client device and a corresponding family key from the set of family keys. The system encrypts an encrypted media asset with the corresponding family key to yield a platform-specific encrypted media asset, and transmits the platform-specific encrypted media asset to the client device. Thus, different client devices receive device-specific encrypted assets which can be all derived based on the same master key.
摘要:
Disclosed herein are systems, methods, and non-transitory computer-readable storage media for key space division and sub-key derivation for mixed media digital rights management content and secure digital asset distribution. A system practicing the exemplary method derives a set of family keys from a master key associated with an encrypted media asset using a one-way function, wherein each family key is uniquely associated with a respective client platform type, wherein the master key is received from a server account database, and identifies a client platform type for a client device and a corresponding family key from the set of family keys. The system encrypts an encrypted media asset with the corresponding family key to yield a platform-specific encrypted media asset, and transmits the platform-specific encrypted media asset to the client device. Thus, different client devices receive device-specific encrypted assets which can be all derived based on the same master key.
摘要:
Disclosed herein are systems, methods, and non-transitory computer-readable media for enforcing application usage policies. As part of an application purchase transaction, the application distributor creates a unique proof of purchase receipt. This receipt can be bundled with the application and delivered to the purchaser. Each machine can maintain an authorization file that lists the users authorized to use applications on that machine. A system configured to practice the method verifies that a user is authorized to use an application on a machine based on an application proof of purchase receipt and the authorization file. If the application proof of purchase receipt and the authorization file are both valid, the system checks if the user account identifier in the receipt is contained in the authorization file. If so, the user can be considered authorized to use the application on the machine.