US 12,088,711 B1
Passive encryption rotation keys
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 Dec. 28, 2021, as Appl. No. 17/563,638.
Application 17/563,638 is a continuation of application No. 16/382,106, filed on Apr. 11, 2019, granted, now 11,240,022.
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 9/08 (2006.01); H04L 9/06 (2006.01)
CPC H04L 9/0891 (2013.01) [H04L 9/0643 (2013.01); H04L 2209/24 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for managing cryptographic key rotation, comprising:
rotating, by a key management server, a symmetric key based on a first schedule to generate a rotated symmetric key, wherein rotating the symmetric key comprises performing a bitwise shifting process comprising:
replacing a most significant bits portion with a least significant bits portion; and
generating a new least significant bits portion based on a hash function of the symmetric key; and
providing, by the key management server, the rotated symmetric key to a client server based on a schedule.