US 11,997,201 B2
Systems and methods for generation of the last obfuscated secret using a seed
Phillip H Griffin, Raleigh, NC (US); and Jeffrey J. Stapleton, O'Fallon, MO (US)
Assigned to Wells Fargo Bank, N.A., San Francisco, CA (US)
Filed by Wells Fargo Bank, N.A., San Francisco, CA (US)
Filed on Apr. 19, 2023, as Appl. No. 18/136,810.
Application 18/136,810 is a continuation of application No. 17/558,558, filed on Dec. 21, 2021, granted, now 11,646,881.
Application 17/558,558 is a continuation of application No. 16/393,621, filed on Apr. 24, 2019, granted, now 11,218,307.
Prior Publication US 2023/0261861 A1, Aug. 17, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 9/32 (2006.01); H04L 9/06 (2006.01); H04L 9/08 (2006.01)
CPC H04L 9/0869 (2013.01) [H04L 9/0643 (2013.01); H04L 9/085 (2013.01); H04L 9/32 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for securely sharing and authenticating a last secret, the method comprising:
generating, by a cryptographic module on a first network node, a seed and an envelope around the seed, the seed configured for deriving or recovering a last secret being a last cryptographic element controlling access to a secure entity; and
transmitting, by the cryptographic module, the seed to a computing system on a second node different than the first node, the computing system being configured to decrypt the envelope of the enveloped seed to recover the seed, and obtain the last secret based on the seed,
wherein the cryptographic module is prevented from deriving the last secret.