US 11,997,214 B2
Separating the authorization of content access and content delivery using multiple cryptographic digital signatures
Colin Whittaker, Newton, MA (US)
Assigned to Google LLC, Mountain View, CA (US)
Appl. No. 17/598,188
Filed by Google LLC, Mountain View, CA (US)
PCT Filed Mar. 26, 2019, PCT No. PCT/US2019/024103
§ 371(c)(1), (2) Date Sep. 24, 2021,
PCT Pub. No. WO2020/197545, PCT Pub. Date Oct. 1, 2020.
Prior Publication US 2022/0166633 A1, May 26, 2022
Int. Cl. H04L 9/32 (2006.01); G06F 21/10 (2013.01)
CPC H04L 9/3247 (2013.01) 20 Claims
OG exemplary drawing
 
1. A method, comprising:
receiving, by a processing device, a first request for content from a client device, wherein the first request comprises a resource locator provided by an authorizing data service to authorize the client device to obtain the requested content, the resource locator identifying a first server of a content distribution network (CDN) to deliver the requested content to the client device, and comprising a first digital signature associated with authorization of the client device to access the requested content, and a second digital signature associated with authorization of delivery of the requested content for access by the client device;
identifying an occurrence of an event that indicates a change in the delivery of the requested content for access by the client device;
responsive to identifying the occurrence of the event, generating a third digital signature associated with a changed delivery of the requested content for access by the client device; and
providing a new resource locator to the client device, the new resource locator comprising the first digital signature associated with authorization of the client device to access the requested content and the third digital signature associated with the changed delivery of the requested content for access by the client device, wherein the client device is operative to access the content using the new resource locator.