SYSTEM AND METHOD FOR DEFINING PROGRAMMABLE PROCESSING STEPS APPLIED WHEN PROTECTING THE DATA
First Claim
1. A client device for using encrypted data comprising:
- an input data interface module for receiving protected data;
a memory for storing a plurality of decryption functions and sequencer data that defines a sequence of selected ones of the plurality of decryption functions; and
a processor coupled to the input data interface module and the memory and arranged to sequentially apply the selected ones of the plurality of the decryption functions to the protected data in the sequence defined by the sequencer data.
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Accused Products
Abstract
Systems and methods for protecting data being sent between a client and a server include the capability of defining programmable processing steps that are applied by the server when protecting the data and the same steps are applied by the client when unprotecting the data. The programmable processing steps can be defined uniquely for each client, and the programmable processing steps are selected from a number of functions using sequencing data that defines the processing steps. The programmable processing steps allow for each client to process encrypted data in a different manner and the programmable processing steps are defined by what is called a digital rights management (DRM) Sequencing Key, and as such the system and method introduces a key-able DRM whereby each DRM message can be processed in a unique (or pseudo unique) manner.
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Citations
20 Claims
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1. A client device for using encrypted data comprising:
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an input data interface module for receiving protected data; a memory for storing a plurality of decryption functions and sequencer data that defines a sequence of selected ones of the plurality of decryption functions; and a processor coupled to the input data interface module and the memory and arranged to sequentially apply the selected ones of the plurality of the decryption functions to the protected data in the sequence defined by the sequencer data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of protecting data to be transmitted to client devices, the method comprising:
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receiving input data to be protected; for each of the client devices, mapping sequencer data that describes an order in which selected ones of plurality of protection functions will be applied to the input data, the mapping based on a mapping used by the respective client device for selecting the protection functions from the sequencer data, wherein each of the client devices has a unique mapping for selecting protection functions from sequencer data; generating protected output data for each of the client devices by executing a software program to sequentially apply the selected protection functions to the input data according to the order described by the corresponding mapped sequencer data; and transmitting the respective protected output DRM data to each of the client devices. - View Dependent Claims (19)
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20. A method of protecting data to be transmitted to client devices, the method comprising:
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receiving input data to be protected; generating protected output data by executing a software program to sequentially apply selected ones of a plurality of protection functions to the input data according to an order described by sequencer data; transmitting the protected output data to the client devices; mapping the sequencer data for each of the client devices based on a mapping used by the respective client device for selecting the protection functions from the sequencer data, wherein each of the client devices has a unique mapping for selecting protection functions from sequencer data; and transmitting the corresponding mapped sequencer data to each of the client devices.
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Specification