US 12,452,077 B2
Methods and systems for key generation
Nancy Louise Davoust, Louisville, CO (US); and Kevin Norman Taylor, Parker, CO (US)
Assigned to Comcast Cable Communications, LLC, Philadelphia, PA (US)
Filed by Comcast Cable Communications, LLC, Philadelphia, PA (US)
Filed on Dec. 5, 2023, as Appl. No. 18/529,804.
Application 18/529,804 is a continuation of application No. 16/914,063, filed on Jun. 26, 2020, granted, now 11,888,989.
Application 16/914,063 is a continuation of application No. 14/671,137, filed on Mar. 27, 2015, granted, now 10,735,200, issued on Aug. 4, 2020.
Prior Publication US 2024/0113887 A1, Apr. 4, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 9/32 (2006.01); H04L 9/08 (2006.01)
CPC H04L 9/3242 (2013.01) [H04L 9/0816 (2013.01); H04L 9/0819 (2013.01); H04L 9/0836 (2013.01); H04L 9/0866 (2013.01); H04L 2209/24 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A method comprising:
determining a service for a device, wherein the device is associated with a product class that has a product class identifier;
generating, based on the product class identifier and a second key stored on the device, a first key associated with the device and the product class, wherein the first key is unique to the device relative to other devices within the product class; and
sending, to the device, encrypted information associated with usage of the service, wherein the device decrypts the encrypted information based on the first key and activates the service.