Patent ID: 11936776
Assignee: WELLS FARGO BANK, N.A.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 20:
21. A first entity computing system comprising at least one processor and a memory storing computer-executable instructions thereon, the computer-executable instructions, when executed by the at least one processor, causing the first entity computing system to:
transmit a hash-based message authentication code (HMAC) key cryptogram and a transaction scheme to a database encryption key management system, the HMAC key cryptogram is generated by the database encryption key management system, the database encryption key management system is associated with a hardware security module (HSM), the HMAC key cryptogram is received by the first entity computing system from the HSM;
receive a seed generated by the database encryption key management system based on the HMAC key cryptogram and the transaction scheme;
decrypt the seed; and
based on the seed, derive a transaction key (Tk) by using the seed as an input to a key derivation algorithm (KDF), the KDF is not known to the HSM.