Method for using communication channel round-trip response time for digital asset management
First Claim
1. A method for distributing digital content from a sending device to an authorized receiving device which is located at a predetermined location and whose authentication data has been compromised by an unauthorized receiving device, the method comprising the steps of:
- determining a predetermined distance from said sending device to said authorized receiving device, where said authorized receiving device is located at a predetermined location that is known to said sending device;
receiving a request for digital content from a device purporting to be said authorized receiving device;
sending, in response to said request for digital content, a request for acknowledgement to said purported receiving device;
receiving an acknowledgement, including device authentication data, from said unauthorized receiving device that corresponds to valid device authentication data from said authorized receiving device;
determining, in response to receiving said acknowledgement from said purported receiving device, an actual round-trip response time for said request for said acknowledgement and the associated acknowledgement; and
using said actual round-trip response time to determine if said purported receiving device is located a distance from said sending device corresponding to said predetermined distance from said sending device to said authorized receiving device.
1 Assignment
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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
13 Claims
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1. A method for distributing digital content from a sending device to an authorized receiving device which is located at a predetermined location and whose authentication data has been compromised by an unauthorized receiving device, the method comprising the steps of:
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determining a predetermined distance from said sending device to said authorized receiving device, where said authorized receiving device is located at a predetermined location that is known to said sending device; receiving a request for digital content from a device purporting to be said authorized receiving device; sending, in response to said request for digital content, a request for acknowledgement to said purported receiving device; receiving an acknowledgement, including device authentication data, from said unauthorized receiving device that corresponds to valid device authentication data from said authorized receiving device; determining, in response to receiving said acknowledgement from said purported receiving device, an actual round-trip response time for said request for said acknowledgement and the associated acknowledgement; and using said actual round-trip response time to determine if said purported receiving device is located a distance from said sending device corresponding to said predetermined distance from said sending device to said authorized receiving device. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for detecting a request for digital content from an unauthorized receiving device which has compromised the authentication of an authorized receiving device, the method comprising the steps of:
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establishing a predetermined reference distance between a sending device and an authorized receiving device, said predetermined reference distance 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; receiving an acknowledgement including device authentication data, from said unauthorized receiving device that corresponds to valid device authentication data from said authorized receiving device; in response to receiving said acknowledgement from said unauthorized receiving device 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 fails to correspond to 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 (8, 9, 10, 11, 12)
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13. 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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establishing a predetermined reference distance between a source device and an authorized receiving device located in said predetermined geographic area, said predetermined reference distance having a corresponding predetermined response time; receiving a request from a destination device for said digital content; said sending device requesting an acknowledgement from said destination device; receiving an acknowledgement, including device authentication data, from said destination device that corresponds to valid device authentication data from said authorized receiving device; recording a first time denoting the time that said request for acknowledgement was sent to said destination 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 said predetermined response time, if said round-trip response time fails to correspond to said predetermined response time, denying said request for digital content and if said round-trip response time corresponds to said predetermined response time, granting said request for said digital content.
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Specification