Method for using communication channel round-trip response time for digital asset management
First Claim
1. A method for preventing distribution of digital content to a receiving device located within a predetermined distance of a sending device, the method comprising the steps of:
- at said sending device, receiving a request for digital content from said receiving device;
in response to receiving said request, requesting an acknowledgement from said receiving device;
in response to receiving said request for said acknowledgement, sending said acknowledgement to said sending device;
in response to receiving said acknowledgement at said sending device;
determining an actual round-trip response time for said request for said acknowledgement; and
using said actual round-trip response time to determine if said receiving device is located within said predetermined distance of said sending device.
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Accused Products
Abstract
The present method for using communication channel round-trip response time for digital asset management utilizes a predetermined distance between a sending device and a receiving device to prevent unauthorized receipt of digital content when the unauthorized receiving device is located beyond the predetermined distance. When the receiving device requests digital content from the sending device, the sending device replies with a request for an acknowledgement. The receiving device sends the requested acknowledgement. The time between sending the request for an acknowledgement and receipt of the acknowledgement is the actual round-trip response time. The actual round-trip response time is compared to a predetermined response time limit for the predetermined distance and if the actual response time is within the predetermined response time limit, the request for digital content is granted and if the actual round-trip response time is not within the predetermined response time limit, the request for digital content is denied.
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Citations
11 Claims
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1. A method for preventing distribution of digital content to a receiving device located within a predetermined distance of a sending device, the method comprising the steps of:
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at said sending device, receiving a request for digital content from said receiving device;
in response to receiving said request, requesting an acknowledgement from said receiving device;
in response to receiving said request for said acknowledgement, sending said acknowledgement to said sending device;
in response to receiving said acknowledgement at said sending device;
determining an actual round-trip response time for said request for said acknowledgement; and
using said actual round-trip response time to determine if said receiving device is located within said predetermined distance of said sending device. - View Dependent Claims (2, 3, 4, 5)
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6. A method for detecting a request for digital content from an unauthorized receiving device, the method comprising the steps of:
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establishing a predetermined reference between a sending device and an authorized receiving device, said predetermined reference having a corresponding predetermined response time;
receiving said request for digital content at said sending device from said unauthorized receiving device;
in response to receiving said request for digital content, sending a request for an acknowledgement to said unauthorized receiving device;
in response to receiving said request for acknowledgement, sending said acknowledgement to said sending device;
in response to receiving said acknowledgement at said sending device, determining an actual round-trip response time; and
comparing said actual round-trip response time to said predetermined response time, wherein if said actual round-trip response time exceeds said predetermined round-trip response limit for said authorized receiving device, said unauthorized receiving device is not authorized to receive said digital content. - View Dependent Claims (7, 8, 9, 10)
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11. A method for preventing distribution of digital content from a source device to an unauthorized destination device located outside of a predetermined geographical area, the method comprising the steps of:
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receiving a request from a destination device for said digital content from said source device;
in response to receiving said request for digital content, requesting an acknowledgement from said destination device;
substantially simultaneously to sending said request for said acknowledgement, recording a first time denoting the time that said request for acknowledge was sent to said destination device;
in response to receiving said acknowledgement request from said source device, sending an acknowledgement from said destination device to said source device;
receiving said acknowledge at said source device from said destination device;
substantially simultaneously to receiving said acknowledge at said source device, recoding a second time denoting the time that said acknowledgement from said destination device was received at said source device;
calculating a difference between said first time and said second time to determine a round-trip response time; and
comparing said round-trip response time to a predetermined response limit representing said predetermined geographical area, if said round-trip response time exceeds said predetermined response limit, denying said request for digital content and if said round-trip response time does not exceed said predetermined response limit, granting said request for said digital content.
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Specification