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

Claim 22:
23. A method for managing secure key exchange electronic transactions without transmitting cleartext keys, the method comprising:
transmitting, by a first entity computing system, a hash-based message authentication code (HMAC) key cryptogram and a transaction scheme to a database encryption key management system;
receiving, by the first entity computing system, a seed generated by the database encryption key management system based on the HMAC key cryptogram and the transaction scheme;
decrypting, by the first entity computing system, the seed;
based on the seed, deriving, by the first entity computing system, a transaction key (Tk);
causing the database encryption key management system to determine that a second entity computing system has been whitelisted to use the transaction scheme; and
causing the database encryption key management system to transmit the seed to the second entity computing system for derivation of the Tk by the second entity computing system based on the seed.