A motion picture distribution system, the system including a central computer, an exhibitor computer, a communication channel, and a back channel. The central computer is located at a central site and configured to distribute a digital version of the motion picture. The exhibitor computer is located at an exhibitor location that is remote from the central site. The exhibitor computer is configured both to receive the digital version of the motion picture from the central computer, and to display the motion picture. The communication channel is configured to facilitate the electronic transfer of the digital version of the motion picture from the central computer to the exhibitor computer. The back channel is coupled between the central computer and the exhibitor computer, and configured to allow for the transfer of information between the exhibitor computer and the central computer.

A method for auditing an advertisement impression in which a first advertisement was presented in conjunction with first media content is disclosed. The method generally comprises transmitting to a plurality of second computing devices a plurality of randomly generated first cryptographic proofs; receiving, a first message from a second computing device indicating that the first advertisement was presented in conjunction with the first media content; and evaluating the first targeting model for the first advertisement based on the at least one media content classifier.

A method for auditing an advertisement impression in which a first advertisement was presented in conjunction with first media content is disclosed. The method generally comprises transmitting to a plurality of second computing devices a plurality of randomly generated first cryptographic proofs; receiving, a first message from a second computing device indicating that the first advertisement was presented in conjunction with the first media content; and evaluating the first targeting model for the first advertisement based on the at least one media content classifier.

A video resource file acquisition method includes: acquiring, by a terminal, a resource decryption key of a target video from a key management server; transmitting, by the terminal, a resource download request for the target video to a resource server of the target video; after receiving the resource download request for the target video, acquiring, by the resource server, a resource encryption key of the target video from the key management server; encrypting, by the resource server, a resource file of the target video by using the resource encryption key and feeding back, by the resource server, the encrypted resource file to the terminal; and after receiving the encrypted resource file, decrypting, by the terminal, the encrypted resource file using the resource decryption key.

A technique for securely transferring content from a first device in a first layer to a second device in a second layer. In one embodiment, the first device is a device in a trusted domain and the second device is outside of the trusted domain. Transfer of protected content to another device may require authentication of the receiving device. A rights file which specifies the rights of the receiving device to use the protected content, according to its security level is also transferred. These rights may concern, e.g., the number of times the receiving device may transfer the protected content to other devices, the time period within which the receiving device may play the protected content, etc. The higher the security level of the receiving device, the more rights accorded thereto. A minimum security level requirement may be imposed in order for protected content to be transferred to a device.

A system, method and apparatus for protecting a media program having a plurality of frames is disclosed. In one embodiment, the method comprises receiving an encrypted plurality of compressed frames in a client device, wherein at least a first portion of the plurality of frames is corrupted before encryption according to one or more corruption operations; decrypting the plurality of compressed frames, decompressing the plurality of compressed frames to recover the plurality of frames, including the first portion of frames corrupted according to the one or more corruption operations, storing the plurality of frames in a frame buffer, extracting the stored plurality of frames from the frame buffer for processing by a graphics processing unit of the client device, at least substantially decorrupting at least some of the corrupted plurality of frames according to one or more decorruption operations in the graphics processing unit, and providing the plurality of frames including the decorrupted plurality of frames for display.

A system and methods are disclosed that enable advertisers, publishers, and consumers to interact to provide well-targeted advertisement impressions, while preserving consumer privacy. Particularly, the system and methods enable accurate and reliable targeting of advertisements without the need for privacy-invasive tracking and collection of consumer information by advertisers or publishers. Instead, the consumer retains complete control of his or her own private information, even while that private information is used for programmatic targeting of advertisements. The system and methods disclosed herein advantageously utilize blockchain as a tool for arbitrating data, which accounts for and helps to eliminate fraud, costly arbitrage, and brand safety concerns by providing the programmatic advertising ecosystem with trust, permanence, transparency, and auditability.

A system and methods are disclosed that enable advertisers, publishers, and consumers to interact to provide well-targeted advertisement impressions, while preserving consumer privacy. Particularly, the system and methods enable accurate and reliable targeting of advertisements without the need for privacy-invasive tracking and collection of consumer information by advertisers or publishers. Instead, the consumer retains complete control of his or her own private information, even while that private information is used for programmatic targeting of advertisements. The system and methods disclosed herein advantageously utilize blockchain as a tool for arbitrating data, which accounts for and helps to eliminate fraud, costly arbitrage, and brand safety concerns by providing the programmatic advertising ecosystem with trust, permanence, transparency, and auditability.

A mechanism by which a secure, privacy preserving query system may be constructed from blockchain technology is disclosed. This system operates on the local differential privacy model through random responses using a private weighted coin protocol. The system specified allows for the ejection of malicious and/or non-interactive participants, minimizes blockchain storage size, and provides a mechanism for forward secrecy. The system specification uses a distributed random beacon to provide a public source of randomness. This randomness is utilized to perform random subset selection from a publicly known list of participating entities. The system uses a homomorphic self-tallying voting protocol under homomorphic encryption to further ensure participant privacy.

A video resource file acquisition method includes: acquiring, by a terminal, a resource decryption key of a target video from a key management server; transmitting, by the terminal, a resource download request for the target video to a resource server of the target video; after receiving the resource download request for the target video, acquiring, by the resource server, a resource encryption key of the target video from the key management server; encrypting, by the resource server, a resource file of the target video by using the resource encryption key and feeding back, by the resource server, the encrypted resource file to the terminal; and after receiving the encrypted resource file, decrypting, by the terminal, the encrypted resource file using the resource decryption key.