Patent ID: 9240891
Filing Date: 2016-01-19
CPC Classification: G06F,G06Q,G07F,H04L

Claim Text:
1. A method comprising: receiving, at an authentication device from a user, wherein the authentication device is a mobile device, a first personal identification number; retrieving a first cryptographic key from a removable memory coupled to the authentication device, wherein the removable memory is a subscriber identity module (SIM) card; generating, at the authentication device, an authentication code based upon the first personal identification number and the first cryptographic key; providing the authentication code to an authentication server; receiving at the authentication device from the authentication server a second personal identification number through an electronic communication interface coupling the authentication device to the authentication server in response to a correct authentication code, wherein the second personal identification number is different from the first personal identification number; and replacing the entire first personal identification number with the second personal identification number at the authentication device, wherein the second personal identification number is later used to authenticate the user.