US 11,973,862 B2
Authentication methods and apparatus for generating digital signatures
Daniel V. Bailey, Pepperell, MA (US); John G. Brainard, Sudbury, MA (US); Ari Juels, Brookline, MA (US); and Burton S. Kaliski, Jr., McLean, VA (US)
Assigned to EMC IP Holding Company LLC, Hopkinton, MA (US)
Filed by EMC IP Holding Company LLC, Hopkinton, MA (US)
Filed on Feb. 5, 2021, as Appl. No. 17/168,910.
Application 17/168,910 is a division of application No. 15/882,503, filed on Jan. 29, 2018, granted, now 10,958,632.
Application 15/882,503 is a division of application No. 13/961,319, filed on Aug. 7, 2013, granted, now 9,923,718, issued on Mar. 20, 2018.
Application 13/961,319 is a continuation of application No. 11/671,264, filed on Feb. 5, 2007, granted, now 9,137,012, issued on Sep. 15, 2015.
Claims priority of provisional application 60/764,826, filed on Feb. 3, 2006.
Prior Publication US 2021/0185028 A1, Jun. 17, 2021
Int. Cl. H04L 9/08 (2006.01); H04L 9/32 (2006.01); H04L 9/40 (2022.01); H04W 12/06 (2021.01); H04W 12/50 (2021.01)
CPC H04L 9/0861 (2013.01) [H04L 9/0877 (2013.01); H04L 9/088 (2013.01); H04L 9/0891 (2013.01); H04L 9/0897 (2013.01); H04L 9/3226 (2013.01); H04L 9/3228 (2013.01); H04L 9/3234 (2013.01); H04L 63/0492 (2013.01); H04L 63/068 (2013.01); H04L 63/08 (2013.01); H04W 12/06 (2013.01); H04W 12/50 (2021.01); H04L 63/0838 (2013.01); H04L 2209/805 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising the steps of:
generating authentication information in a first processing device;
receiving data to be signed from a second processing device;
generating a digital signature in the first processing device by signing the received data utilizing at least a portion of the authentication information;
wherein the step of generating the digital signature in the first processing device further comprises generating the digital signature only after the first processing device receives out-of-band verification of the data to be signed;
wherein receiving the data to be signed from the second processing device comprises:
selectively activating a radio of the first processing device to enable bidirectional communication between the first processing device and the second processing device; and
utilizing the activated radio of the first processing device to process one or more probe requests from the second processing device, the one or more probe requests comprising at least a portion of the data to be signed; and
wherein the out-of-band verification is based at least in part on capturing, utilizing a camera of the first processing device, an image of data displayed on a screen of the second processing device.