초록 ▼

The invention provides a method, system, and computer program product to control the access, copying, and/or transfer of a digital asset by mobile, wireless devices using a digital voucher. The digital voucher references a primary content that contains all of the expression for that particular asset

The invention provides a method, system, and computer program product to control the access, copying, and/or transfer of a digital asset by mobile, wireless devices using a digital voucher. The digital voucher references a primary content that contains all of the expression for that particular asset and a secondary content that contains information that can be distilled out as a preview. The information in the primary content can be limited to a specified duration or a specific number of viewings. The author, owner, or possessor of the digital asset specifies the terms and conditions for distribution of the digital asset. The digital voucher authorizes the mobile, wireless device to access a specified primary or secondary content that may be located elsewhere in the network. The mobile, wireless device can download a copy of portions or all of the content depending on the terms specified in the voucher.

대표청구항 ▼

We claim: 1. A system, comprising: a plurality of content servers in a network, including a first content server storing a copy of a digital asset containing content encrypted with a content key; a plurality of voucher servers in the network coupled to said plurality of content servers, including a

We claim: 1. A system, comprising: a plurality of content servers in a network, including a first content server storing a copy of a digital asset containing content encrypted with a content key; a plurality of voucher servers in the network coupled to said plurality of content servers, including a first voucher server in a first domain of the network, the first voucher server having registered said content by encrypting said content with said content key and having included with said encrypted content, a network address for said first voucher server, which it has returned to said content servers, and generating a voucher including said content key enabling access to said content in response to a request; a plurality of payment servers in the network, including a first payment server in a first domain of the network coupled to said first voucher server and a second payment server in a second domain of the network coupled to said first voucher server, either said first or said second payment server sending a request for said voucher using said network address to said first voucher server in response to a payment from a requestor in said first or said second domains, respectively, and forwarding the voucher to the requestor; a first wireless device having a first device ID, sending a request to the network while in said first domain for said content and receiving from said first content server the digital asset including a content ID, said encrypted content, said network address for said first voucher server, and information on obtaining rights to the content, which is expressed in a voucher generated by said first voucher server in the network; a second wireless device having a second device ID; said first wireless device performing super-distribution of the content to said second wireless device via messaging by sending said encrypted content and said network address for said first voucher server; said second wireless device sending while in said second domain to said second payment server an authorization for payment for access to said content, said network address for said first voucher server, and a request for said voucher; said second payment server using said network address for said first voucher server, requesting said voucher from said first voucher server and forwarding the voucher including said content key to said second wireless device. 2. A method, comprising: registering content with a first voucher server of a plurality of voucher servers, in a first domain of a network by encrypting said content with a content key and including with said encrypted content, a network address for said first voucher server; storing a copy of a digital asset containing said content encrypted with said content key and said network address for said first voucher server, in a plurality of content servers, including a first content server, in a network; generating a voucher including said content key enabling access to said content in response to a request to said first voucher server; sending a request to the network for said content from a first wireless device while in said first domain, and receiving in said first wireless device from said first content server the digital asset including a content ID, said encrypted content, and said network address for said first voucher server, requesting said voucher with a first payment server of a plurality of payment servers, in a first domain of the network by sending a request to said first voucher server for said voucher using said network address of said first voucher server in response to a payment from said first wireless device and forwarding the voucher to said first wireless device; performing super-distribution of the content from said first wireless device to a second wireless device via messaging by sending said encrypted content and said network address for said first voucher server; sending to a second payment server of the plurality of payment servers, in a second domain of the network an authorization for payment for access to said content, said network address for said first voucher server, and a request for said voucher, from said second wireless device while in said second domain; requesting said voucher from said first voucher servers-by said second payment server using said network address for said first voucher server, and forwarding the voucher including said content key to said second wireless device. 3. A program product, comprising: a computer readable medium; code in the computer readable medium for registering content with a first voucher server of a plurality of voucher servers, in a first domain of a network by encrypting said content with a content key and including with said encrypted content, a network address for said first voucher server; code in the computer readable medium for storing a copy of a digital asset containing said content encrypted with said content key and said network address for said first voucher server, in a plurality of content servers, including a first content server, in a network; code in the computer readable medium for generating a voucher including said content key enabling access to said content in response to a request to said first voucher server; code in the computer readable medium for sending a request to the network for said content from a first wireless device while in said first domain, and receiving in said first wireless device from said first content server the digital asset including a content ID, said encrypted content, and said network address for said first voucher server, code in the computer readable medium for requesting said voucher with a first payment server of a plurality of payment servers, in a first domain of the network by sending a request to said first voucher server for said voucher using said network address of said first voucher server in response to a payment from said first wireless device and forwarding the voucher to said first wireless device; code in the computer readable medium for performing super-distribution of the content from said first wireless device to a second wireless device via messaging by sending said encrypted content and said network address for said first voucher server; code in the computer readable medium for sending to a second payment server of the plurality of payment servers, in a second domain of the network an authorization for payment for access to said content, said network address for said first voucher server, and a request for said voucher, from said second wireless device while in said second domain; code in the computer readable medium for requesting said voucher from said first voucher server by said second payment server using said network address for said first voucher server, and forwarding the voucher including said content key to said second wireless device.