Patent ID: 9092608
Filing Date: 2015-07-28
Classification: G06F,H04L

Abstract:
1. A method for dynamically changing a random card identification code associated with a smartcard in a system having a card reader system interacting with the smartcard comprising: providing a current random card identification code associated with the smartcard from the smartcard to the card reader system at the beginning of an interaction between the smartcard and the card reader system; verifying whether the current random card identification code is valid in the card reader system; and providing a new random card identification code from the card reader system to the smartcard if the current random card identification code is valid; wherein the smartcard comprises a state machine that operates to replace the current random card identification code with the new random card identification code in a non-secure memory of the smartcard when the new random card identification code is provided to the smartcard; wherein the current random card identification code and the new random card identification code are card identification codes that are used in an anti-collision process to distinguish between multiple smartcards and the current and new random card identification codes are used to encrypt contents of a secure memory of the smartcard.