US 12,457,096 B2
Gateway agnostic tokenization
Sivanarayana Gaddam, San Francisco, CA (US); Pratyay Mukherjee, Santa Clara, CA (US); and Gaven Watson, Palo Alto, CA (US)
Assigned to Visa International Service Association, San Francisco, CA (US)
Filed by Visa International Service Association, San Francisco, CA (US)
Filed on Jun. 3, 2024, as Appl. No. 18/732,309.
Application 18/732,309 is a continuation of application No. 17/633,719, granted, now 12,034,837, previously published as PCT/US2020/015797, filed on Jan. 30, 2020.
Claims priority of provisional application 62/894,057, filed on Aug. 30, 2019.
Prior Publication US 2024/0323000 A1, Sep. 26, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04L 9/08 (2006.01); G06Q 20/14 (2012.01); G06Q 20/38 (2012.01)
CPC H04L 9/0822 (2013.01) [H04L 9/0861 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method comprising:
generating, by a token server computer, a token server computer public-private key pair comprising a token server computer public key and a token server computer private key
generating, by the token server computer, a re-encryption key using a gateway computer public key and the token server computer private key;
receiving, by token server computer from a gateway computer, a credential;
producing, by the token server computer, a first ciphertext by encrypting the credential with a cryptographic key;
producing, by the token server computer, a second ciphertext by encrypting the cryptographic key using the token server computer public key; and
transmitting, by the token server computer a data item comprising the first ciphertext and the second ciphertext to the gateway computer, wherein the gateway computer generates a token by hashing the data item, wherein the token is subsequently used by a user associated with the credential to obtain a resource from a resource provider in an interaction, wherein the re-encryption key is configured to re-encrypt the second ciphertext in the interaction.