摘要:
A method for securely receiving a multimedia content by a client device operated by one or more operator(s) involving a dedicated provisioning server of a security provider managing symmetric secrets used by the client devices and operators license servers. The provisioning server provides to the client device one or more generations of operator specific unique device secrets, which are then exploited by the various operators' license servers to deliver licenses such that authorized client devices can consume protected multimedia contents.
摘要:
A method is provided for delivering a streaming media asset to a client device. For the method, a request is received over a communication network from a client device for playing a media asset in accordance with a streaming media technique. Prior to fully authorizing the client device to play the media asset, the client device is provided with access to a first cryptographic key that decrypts a subset of the media asset so that the client device is able to render the subset of the media asset before completion of the authorization. The subset of the media asset is less than all of the media asset. Subsequent to successfully fully authorizing the client device to play the media asset, the client is provided with access to at least one additional cryptographic key that decrypts a remainder of the media asset.
摘要:
Multi-resolution encoded files are stored on a plurality of disk drives using systematic network coded storage. In some embodiments, the stored files are used to provide video streaming services for users.
摘要:
This invention relates to a method and a system of digital right management on a computer system. Protected video content is decrypted where encoded frames of data are buffered and overwritten after decoding to prevent the unauthorized copying. The system includes a software client that has a user identifiable key for tracing any unauthorized copying of the client and decrypted video file.
摘要:
A method to bind the use of a digital audio / video service data receiver to a network on which at least one services provider broadcasts access controlled and free digital audio / video services streams,, the method is characterized by steps of: receiving by the receiver a periodic signal transmitted by a conditional access system server via the network, said periodic signal being processed by a run time software embedded in the receiver to check legitimacy of the network, displaying services available on the network only if said run time software recognizes the periodic signal as indicating network legitimacy, checking operability of the run time software and if necessary taking actions to enforce limitation of using the receiver on the network checked as legitimate. The invention further discloses a receiver bound to a specific network configured to perform the method.
摘要:
In one embodiment, the present invention includes a method for accessing content subscription information from a secure storage of a mobile device, communicating the content subscription information to an authorization service of a content provider with a request to receive content, receiving in the mobile device an authorization from the content provider which includes a time bound identifier corresponding to a time bounded authorization to receive the content during a time bounded window, and receiving and outputting the content from the mobile device during the time bounded window. Other embodiments are described and claimed.
摘要:
Methods and apparatus are provided for providing a DRM service by a user terminal apparatus consuming DRM content in a service environment that provides the DRM content using a plurality of incompatible DRM systems. A license corresponding to the DRM content is acquired from a service providing apparatus that provides the DRM content. It is determined whether the license is a common license having a common DRM interface format. The common DRM interface format of the common license is converted to a format of a first DRM system installed in the user terminal apparatus, when the license is the common license. The license having the format of the first DRM system is applied in reproducing the DRM content. The common license is provided from the service providing apparatus to the user terminal apparatus through a common DRM interface when the service providing apparatus does not support the first DRM system.
摘要:
Systems and methods are disclosed for performing anti-piracy countermeasures in order to prevent unauthorized access of protected content. A conditional access system may be modified to include a counter. The counter is incremented every time the conditional access system receives a request that is a potential indication of pirate activity. The counter may also be decremented every time the conditional access system receives a request indicative of legitimate activity. If the conditional access system receives a management message containing a key required to access content keys, the conditional access system checks the counter. If the counter is below a threshold value, the conditional access system obtains the key. However, if the counter is above the threshold value, the conditional access system disregards the key contained in the management message, thereby losing access to protected content.