Patent ID: 11966912
Assignee: AUCTANE, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 16:
17. One or more non-transitory computer-readable media comprising instructions that, when executed by one or more processors, cause operations comprising:
obtaining a customer private key associated with a customer from a secure local storage at a customer computer system;
obtaining a first vendor digital signature derived from a first postage transaction record, the first postage transaction record relating to a previously executed transaction;
responsive to a purchase request, completing a current purchase transaction for a product associated with the postage vendor and store information associated with the purchase transaction as at least part of a second postage transaction record, the completing being performed without communicating with a vendor computer system;
creating a customer digital signature using (i) the customer private key, (ii) the first vendor digital signature, and (iii) the second postage transaction record; and
providing validation of the completed current purchase transaction to the vendor computer system associated with the postage vendor by transmitting the customer digital signature to the vendor computer system; and
responsive to transmitting the customer digital signature, obtaining a second vendor digital signature from the vendor computer system, the second vendor digital signature being different from the first vendor digital signature and being created using (i) a vendor private key associated with the postage vendor and (ii) the customer digital signature; and
storing the second vendor digital signature to be used in a subsequent transaction.