US 11,956,357 B2
Traceable key block-chain ledger
Michael J. T. Chan, Cupertino, CA (US); Sean R. Embry, San Jose, CA (US); Derek A. Chamorro, Austin, TX (US); Anuj Kaul, San Jose, CA (US); Sahil Chadha, San Jose, CA (US); and Nikhil Firke, San Jose, CA (US)
Assigned to eBay Inc., San Jose, CA (US)
Filed by eBay Inc., San Jose, CA (US)
Filed on Jul. 7, 2023, as Appl. No. 18/219,144.
Application 18/219,144 is a continuation of application No. 17/388,873, filed on Jul. 29, 2021, granted, now 11,736,288.
Application 17/388,873 is a continuation of application No. 16/842,690, filed on Apr. 7, 2020, granted, now 11,108,554, issued on Aug. 31, 2021.
Application 16/842,690 is a continuation of application No. 15/858,949, filed on Dec. 29, 2017, granted, now 10,715,323, issued on Jul. 14, 2020.
Prior Publication US 2023/0353357 A1, Nov. 2, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 9/08 (2006.01); G06F 21/64 (2013.01); H04L 9/00 (2022.01); H04L 9/06 (2006.01); H04L 9/14 (2006.01); H04L 9/30 (2006.01); H04L 9/32 (2006.01)
CPC H04L 9/0894 (2013.01) [G06F 21/64 (2013.01); H04L 9/002 (2013.01); H04L 9/0637 (2013.01); H04L 9/08 (2013.01); H04L 9/0819 (2013.01); H04L 9/0861 (2013.01); H04L 9/0891 (2013.01); H04L 9/14 (2013.01); H04L 9/30 (2013.01); H04L 9/3247 (2013.01); H04L 9/50 (2022.05)] 20 Claims
OG exemplary drawing
 
1. A computer-implemented method comprising:
generating a first block on a blockchain, the first block corresponding to a cryptographic key;
securely modifying the first block to include metadata describing a key source for the cryptographic key;
generating a second block on the blockchain, the second block corresponding to a first key transaction with the cryptographic key;
linking the second block to the first block; and
securely modifying the second block to include metadata describing the first key transaction with the cryptographic key.